CN108342657B - A kind of high abrasion cermet composite roll set and preparation method thereof - Google Patents

A kind of high abrasion cermet composite roll set and preparation method thereof Download PDF

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Publication number
CN108342657B
CN108342657B CN201810259717.6A CN201810259717A CN108342657B CN 108342657 B CN108342657 B CN 108342657B CN 201810259717 A CN201810259717 A CN 201810259717A CN 108342657 B CN108342657 B CN 108342657B
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composite roll
abrasion
steel
particle
ceramic
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CN201810259717.6A
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CN108342657A (en
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佟伟平
李萍
李笑
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东北大学
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    • CCHEMISTRY; METALLURGY
    • C22METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22CALLOYS
    • C22C38/00Ferrous alloys, e.g. steel alloys
    • C22C38/04Ferrous alloys, e.g. steel alloys containing manganese
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B02CRUSHING, PULVERISING, OR DISINTEGRATING; PREPARATORY TREATMENT OF GRAIN FOR MILLING
    • B02CCRUSHING, PULVERISING, OR DISINTEGRATING IN GENERAL; MILLING GRAIN
    • B02C4/00Crushing or disintegrating by roller mills
    • B02C4/28Details
    • B02C4/30Shape or construction of rollers
    • B02C4/305Wear resistant rollers
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B22CASTING; POWDER METALLURGY
    • B22DCASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
    • B22D19/00Casting in, on, or around objects which form part of the product
    • B22D19/16Casting in, on, or around objects which form part of the product for making compound objects cast of two or more different metals, e.g. for making rolls for rolling mills
    • CCHEMISTRY; METALLURGY
    • C21METALLURGY OF IRON
    • C21DMODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE BY DECARBURISATION, TEMPERING OR OTHER TREATMENTS
    • C21D9/00Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor
    • C21D9/38Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor for roll bodies
    • CCHEMISTRY; METALLURGY
    • C22METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22CALLOYS
    • C22C38/00Ferrous alloys, e.g. steel alloys
    • C22C38/02Ferrous alloys, e.g. steel alloys containing silicon
    • CCHEMISTRY; METALLURGY
    • C22METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22CALLOYS
    • C22C38/00Ferrous alloys, e.g. steel alloys
    • C22C38/18Ferrous alloys, e.g. steel alloys containing chromium
    • CCHEMISTRY; METALLURGY
    • C22METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22CALLOYS
    • C22C38/00Ferrous alloys, e.g. steel alloys
    • C22C38/18Ferrous alloys, e.g. steel alloys containing chromium
    • C22C38/22Ferrous alloys, e.g. steel alloys containing chromium with molybdenum or tungsten
    • CCHEMISTRY; METALLURGY
    • C22METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22CALLOYS
    • C22C38/00Ferrous alloys, e.g. steel alloys
    • C22C38/18Ferrous alloys, e.g. steel alloys containing chromium
    • C22C38/24Ferrous alloys, e.g. steel alloys containing chromium with vanadium
    • CCHEMISTRY; METALLURGY
    • C22METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22CALLOYS
    • C22C38/00Ferrous alloys, e.g. steel alloys
    • C22C38/18Ferrous alloys, e.g. steel alloys containing chromium
    • C22C38/26Ferrous alloys, e.g. steel alloys containing chromium with niobium or tantalum
    • CCHEMISTRY; METALLURGY
    • C22METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22CALLOYS
    • C22C38/00Ferrous alloys, e.g. steel alloys
    • C22C38/18Ferrous alloys, e.g. steel alloys containing chromium
    • C22C38/28Ferrous alloys, e.g. steel alloys containing chromium with titanium or zirconium
    • CCHEMISTRY; METALLURGY
    • C22METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22CALLOYS
    • C22C38/00Ferrous alloys, e.g. steel alloys
    • C22C38/18Ferrous alloys, e.g. steel alloys containing chromium
    • C22C38/36Ferrous alloys, e.g. steel alloys containing chromium with more than 1.7% by weight of carbon
    • CCHEMISTRY; METALLURGY
    • C22METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22CALLOYS
    • C22C38/00Ferrous alloys, e.g. steel alloys
    • C22C38/18Ferrous alloys, e.g. steel alloys containing chromium
    • C22C38/40Ferrous alloys, e.g. steel alloys containing chromium with nickel
    • C22C38/44Ferrous alloys, e.g. steel alloys containing chromium with nickel with molybdenum or tungsten
    • CCHEMISTRY; METALLURGY
    • C22METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22CALLOYS
    • C22C38/00Ferrous alloys, e.g. steel alloys
    • C22C38/18Ferrous alloys, e.g. steel alloys containing chromium
    • C22C38/40Ferrous alloys, e.g. steel alloys containing chromium with nickel
    • C22C38/46Ferrous alloys, e.g. steel alloys containing chromium with nickel with vanadium
    • CCHEMISTRY; METALLURGY
    • C22METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22CALLOYS
    • C22C38/00Ferrous alloys, e.g. steel alloys
    • C22C38/18Ferrous alloys, e.g. steel alloys containing chromium
    • C22C38/40Ferrous alloys, e.g. steel alloys containing chromium with nickel
    • C22C38/48Ferrous alloys, e.g. steel alloys containing chromium with nickel with niobium or tantalum
    • CCHEMISTRY; METALLURGY
    • C22METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22CALLOYS
    • C22C38/00Ferrous alloys, e.g. steel alloys
    • C22C38/18Ferrous alloys, e.g. steel alloys containing chromium
    • C22C38/40Ferrous alloys, e.g. steel alloys containing chromium with nickel
    • C22C38/50Ferrous alloys, e.g. steel alloys containing chromium with nickel with titanium or zirconium
    • CCHEMISTRY; METALLURGY
    • C22METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22CALLOYS
    • C22C38/00Ferrous alloys, e.g. steel alloys
    • C22C38/18Ferrous alloys, e.g. steel alloys containing chromium
    • C22C38/40Ferrous alloys, e.g. steel alloys containing chromium with nickel
    • C22C38/56Ferrous alloys, e.g. steel alloys containing chromium with nickel with more than 1.7% by weight of carbon

Abstract

A kind of high abrasion cermet composite roll set and preparation method thereof, belongs to wear-resistant material technical field.The high abrasion cermet composite roll set, including preset inner sleeve and housing, the material of preset inner sleeve are common middle low carbon steel or low-alloy steel, and housing mould material is that high-wear-resistant alloy and ceramic-metal composite enhance block.Sintering powder bottom is put into using the stainless steel part of inverted " t " type, ceramic-metal composite is enhanced and has more the tip portion for carrying out T-shape in block by designated position insertion sand mold, then enhances in ceramic-metal composite and pours into high-wear-resistant alloy liquid among block and preset inner sleeve.By subsequent heat treatment, integral composite performance boost, obtained composite roll set interface cohesion is preferable, the gross imperfections such as no hole, segregation, crackle.This method preparation process is simple, it is easily operated, be convenient for industrialization large-scale production.

Description

A kind of high abrasion cermet composite roll set and preparation method thereof

Technical field

The invention belongs to wear-resistant material technical fields, and in particular to a kind of high abrasion cermet composite roll set and its preparation Method.

Background technique

Crushing is in the widely applied basic work of all conglomeraties such as mine, medicine, building materials, machinery, environmental protection, papermaking Skill plays a crucial role in the development of national economy.High-pressure roller mill, vertical mill are wear-proof techniques currently on the market The two kinds of disintegrating apparatus mainly used in field, roll surface mainly have antifriction alloy roller by years of researches and exploitation at present Face, wear-resistant material hardfacing roll surface, hexagon powder metallurgy roll surface and hard alloy stud inlay four kinds of roll surface.Antifriction alloy roll surface Using relatively broad, but there is a problem of that wearability is insufficient in actual application;The production work of wear-resistant material hardfacing roll surface Skill is that two layers of different material is welded on wear resistant roll matrix, is chiefly used in cement industry, this kind of roll surface can repeatedly opposite grinding loss Normal use after the roll surface of effect is repaired, but weld and compound bed boundary are easily cracked and lead to material in use Material falls off;For hexagon powder metallurgy roll surface at present also in the experimental stage, the problem of being primarily present is that brittleness is larger, crushed Stress is easily generated in journey to concentrate and crack initiation;Hard alloy stud inlays the unique design that roll surface has its relatively advanced, but Roll surface failure is since the wearability and compression strength of basis material are insufficient mostly, and the selection of matrix roll surface material is into one Step improves the key of its service performance and service life.

Under numerous working conditions, it is desirable that material wearability with higher, while requiring material that there is good fracture Toughness.It is met the requirements in general, single material is more difficult, therefore compound using the progress of the bimetallic of higher abrasion resistance and preferable toughness Casting, using the method for centrifugal casting, produces a kind of not only wear-resisting but also Resisting fractre metal roller, can significantly promote the resistance to of material Mill property, but the wear resistant roll set of such method preparation is applied to there are problems that metallurgical bonding, easily there is hole in faying face, cracking lacks It falls into, the service life for covering composite roll substantially reduces;Simultaneously using such preparation method there are centrifugal casting apparatus higher cost, The problem of technical matters complexity.

Summary of the invention

In view of the deficiencies of the prior art, the invention proposes a kind of high abrasion cermet composite roll set and its preparation sides Method, the high abrasion cermet composite roll set be it is a kind of using common middle low carbon steel or low-alloy steel as the preset inner sleeve of high tenacity, with Ceramic-metal composite enhancing block and high-wear-resistant alloy material are cast into the composite roll set of housing.The technology of preparing is with reasonable Structure design, the preparation process of simple and flexible, make cermet composite roll cover wear-resisting property with higher, mechanical tenacity and Impact resistance.

The present invention uses common middle low carbon steel or low-alloy steel to be placed in sand mold designated position for preset inner sleeve, and housing is gold Belong to ceramic composite enhancing block and high-wear-resistant alloy is poured and forms integrated composite roll set.Cermet is multiple in housing Condensation material is enhanced block and is prepared using temperature programmed control sintering method, which simple process, can be effectively controlled The ceramic particle homogeneous distribution of high-volume fractional.In the preparation, sintering powder bottom is put into using the stainless steel part of inverted " t " type, Ceramic-metal composite is enhanced and has more the tip portion for carrying out T-shape in block by designated position insertion sand mold, then in metal High-wear-resistant alloy liquid is poured among ceramic composite enhancing block and preset inner sleeve.By subsequent heat treatment, whole composite wood Expect performance boost, obtained composite roll set interface cohesion is preferable, the gross imperfections such as no hole, segregation, crackle.

A kind of high abrasion cermet composite roll set of the invention, including preset inner sleeve and housing, the material of preset inner sleeve For common middle low carbon steel or low-alloy steel, housing mould material is that high-wear-resistant alloy and ceramic-metal composite enhance block; Housing wall thickness is that high abrasion cermet composite roll covers the 1/5~1/2 of whole wall thickness;

Wherein, the impact flexibility of the common middle low carbon steel or low-alloy steel is 21~100J/mm2

The mass percent of ingredient and each ingredient that the high-wear-resistant alloy contains are as follows: C:1.0%~3.5%, Mo: 2.0%~10.0%, Mn:0.5~1.0%, Cr:2.0~16%, V:0~10.0%, Ni:0~1.0%, W:0~20%, Nb:0~3%, Ti:0~20%, Si:0.1%~1%, P:0~0.02%, S:0~0.01%, remaining is for Fe and unavoidably Impurity;

The ceramic-metal composite enhancing block includes enhancing particle, and wear resistant alloy powders and stainless steel part are fixed Part;The enhancing particle is as reinforced phase, and the wear resistant alloy powders are as matrix, in mass ratio, enhances particle: wear-resisting Alloy powder=1:(1~4);The stainless steel part fixing piece is preferably that T-shape stainless steel part is fixing piece;

The enhancing particle is ceramic oxide particle and/or carbide ceramic particles;

Wherein, ceramic oxide particle are as follows: Al2O3White fused alumina particle, Al2O3Brown Alundum particle, ZrO2-Al2O3Particle (ZTA);Carbide ceramic particles are as follows: WC particle, SiC particulate, TiC particle, VC particle, B4C particle, Mo2C particle, ZrC particle, Cr3C2Particle.Enhancing particle is one such or several mixing, and average particle size range is 0.1~5mm.

In the ceramic-metal composite enhancing block, the matter of ingredient and each ingredient that wear resistant alloy powders contain Measure percentage are as follows: C:1~6%, Si:0.1~1.0%, Cr:4~16%, Mo:0~10%, Mn:0~20%, Ti:0~ 10%, Ni:0~20%, V:0~10%, Nb:0~3%, W:0~20%, P:0~0.02%, S:0~0.01%, remaining is Iron and inevitable impurity.

The common middle low carbon steel or low-alloy steel are particularly preferred as Q235,20 steel, 20Cr steel, 40Cr steel, 40CrMo One of steel, 42CrMoV steel, 40 steel or 45 steel.

The T-shape stainless steel part is preferably 316L type.

The described ceramic-metal composite enhancing bulk shape is preferably cylindrical body, tetragonal body, in six arris cylinders It is a kind of.

High abrasion cermet composite roll set prepared by the present invention, housing ceramic-metal composite enhance the base in block Body hardness is 700~900HV, and ceramic particle hardness is 1400~2400HV, and interface hardness is 980~1300HV, composite roll set Impact flexibility is 4~8J/mm2, the shear strength between preset inner sleeve and housing is 500~650MPa.

High abrasion cermet composite roll set prepared by the present invention is in high-pressure roller mill or vertical mill.

The preparation method of high abrasion cermet composite roll set of the invention, specifically includes the following steps:

Step 1, the preparation of ceramic-metal composite enhancing block:

(1) according to the ratio, enhancing particle and wear resistant alloy powders is weighed, is put into mixed powder machine and mixes powder, mixing time is 2~ 4h obtains mixed material;

(2) part of the mixed material is put into crucible bottom, T-shape stainless steel part upside down uses mixture in crucible Material fills up crucible, obtains the crucible for filling up material;

(3) it will be filled with the crucible of material using temperature programmed control sintering process, ceramic-metal composite, which is made, enhances block;

Step 2, high abrasion cermet composite roll covers preset inner sleeve casting:

(1) common middle low carbon steel or low-alloy steel are selected, is poured according to common pouring technology, size requirement is obtained The preset inner sleeve of high abrasion cermet composite roll set;

(2) surface of the preset inner sleeve of high abrasion cermet composite roll set is surface-treated, it is accurate obtains size The preset inner sleeve of the smooth high abrasion cermet composite roll set in surface;

Step 3, prepared by sand mold:

(1) sand mold raw material is weighed according to proportion, after mixing, manufactures sand mold, sand mold uses prefabricated wood pattern molding, and moulding finishes Afterwards, filling CO 2 gas is solidified, and is then taken out prefabricated wooden model, the sand mold after obtaining moulding;

The size of sand mold and the size of the high abrasion cermet composite roll of preparation set match, specifically: sand mold it is interior Diameter is the outer diameter of high abrasion cermet composite roll set, and the height of sand mold is higher by 5 than the height that high abrasion cermet composite roll covers ~15%, meanwhile, the circle of size identical as the preset inner sleeve outer diameter that high abrasion cermet composite roll covers is arranged in the bottom of sand mold Cylindrical groove, the depth of groove are the 3~8% of preset inner sleeve height, according to high abrasion cermet on the type cavity wall of sand mold Composite roll set ceramic-metal composite enhancing block be arranged T-shape stainless steel trough, T-shape stainless steel trough it is big Small and shape is determined according to T-shape stainless steel part;

(2) it by the sand mold mold cavity surface brush fireproof coating after moulding, after igniting is dry, then is placed in baker and dries, it is cold But after, cooling sand mold is obtained;

Step 4, high abrasion cermet composite roll set housing casting:

(1) cermet prepared in step 1 enhancing block is uniformly inserted into the inner wall surrounding of sand mold;

(2) the preset inner sleeve for the high abrasion cermet composite roll set that step 2 casting obtains is placed in what step 3 manufactured In groove in sand mold, it will be preheated in whole push-in blast furnace, the casting mold after being preheated;Wherein, preheating temperature is 200~600 DEG C, preheating time is 2~6h;

(3) in 1500~1700 DEG C of progress meltings, highly wear-resisting alloy steel molten steel is obtained, casting of coming out of the stove;The high abrasion The mass percent of chemical component and each chemical component that steel alloy molten steel contains are as follows: C:1.0%~3.5%, Mo:2.0% ~10.0%, Mn:0.5~1.0%, Cr:2.0~16%, V:0~10.0%, Ni:0~1.0%, W:0~20%, Nb:0~ 3%, Ti:0~20%, Si:0.1%~1%, P:0~0.02%, S:0~0.01%, remaining for Fe and inevitably it is miscellaneous Matter;

(4) after highly wear-resisting alloy steel molten steel is come out of the stove, using gravity-assist pouring, pouring temperature is 1400~1600 DEG C, is poured into In casting mold after preheating, it is cooled to room temperature, carries out sand removal processing, and ceramic-metal composite is enhanced to " T " of block The part of type stainless steel part insertion sand mold is cut off, and high abrasion cermet composite roll set after cooling will be obtained;

Step 5, high abrasion cermet composite roll set heat treatment:

(1) high abrasion cermet composite roll after cooling is covered in push-in high temperature furnace and is carried out at integral high-temperature diffusion annealing Reason, air-cooled, the high abrasion cermet composite roll set after being annealed;Wherein, annealing temperature is 1050~1400 DEG C, when annealing Between be 10~12h;

(2) the high abrasion cermet composite roll set after annealing is quenched, obtains quenched high abrasion metal pottery Porcelain composite roll set;Wherein, hardening heat is 900~1000 DEG C, keeps the temperature 9~10h;

(3) quenched high abrasion cermet composite roll set is tempered, obtains high abrasion cermet composite roll Set;Wherein, tempering temperature is 350~550 DEG C, keeps the temperature 9~12h.

In the step 1 (2), the crucible is preferably corundum crucible, and the shape of crucible is made pottery according to the metal of preparation Porcelain composite material enhances depending on the shape of block.

In the step 1 (3), the temperature programmed control sintering process, specifically: the crucible that will be filled with material is put into atmosphere It is sintered in protection stove, protective atmosphere is argon gas, and sintering temperature is 1100~1500 DEG C, and sintering time is 6~20h, is obtained Ceramic-metal composite enhances block;The protection stove is first to vacuumize, and then passes to argon gas, forms argon gas and protects gas Atmosphere.

In the step 2 (1), the common middle low carbon steel or low-alloy steel, toughness are 21~100J/mm2, tool Body is preferably one of Q235,20 steel, 20Cr steel, 40Cr steel, 40CrMo steel, 42CrMoV steel, 40 steel or 45 steel.

In the step 2 (2), the surface treatment, specifically: high abrasion metal is removed using machining process Ceramic Composite roller covers the surface scale of preset inner sleeve, is cleaned to clean surface with alcohol or acetone soln, and guarantee height The dimensional accuracy of the preset inner sleeve workpiece of wear-proof metal ceramic composite roll set.

In the step 3 (1), the mass percent of raw material and each raw material that the sand mold includes are as follows: molding sand: 75 ~80%, clay: 10~14%, surplus is water, and molding sand is the mixing of one or more of zircon sand, emergy, chromite sand.

In the step 3 (2), the fireproof coating is alumina powder, and the drying, temperature is 300~700 DEG C, the time is 2~8h.

In the step 4 (3), preferably, the melting, carries out in electric arc furnaces.

In the step 4 (3), before highly wear-resisting alloy steel molten steel is come out of the stove, refining deterioration agent is added, to highly wear-resisting alloy steel Molten steel carries out Metamorphism treatment.

After tested, the matrix hardness of high abrasion ceramic-metal composite enhancing block in the above way obtained >= 700HV, high-wear-resistant alloy pouring area hardness >=800HV, preset inner sleeve hardness >=200HB, composite roll set impact flexibility be >= 4J/mm2, shear strength >=500MPa between preset inner sleeve and housing, and ceramic particle Hardness loss is smaller, ceramic particle with Basal body interface is apparent metallurgical bonding, and casting high-wear-resistant alloy liquid is combined closely with reinforcement and preset inner sleeve interface, whole The generation of end discovery crackle after heat treatment, the high abrasion cermet composite roll set meet the use item that wear-resistant material crushes field Part.

A kind of high abrasion cermet composite roll set of the present invention and preparation method thereof, compared to the prior art, has as follows Feature:

(1) preparation process of the present invention it is simple, it is easily operated, be convenient for industrialization large-scale production;

(2) present invention prepares composite roll set using preset inner sleeve method, after high temperature diffusion annealing is handled, preset inner sleeve and outer Set is metallurgical bonding, does not occur hole, crack defect;

(3) present invention employs a variety of ceramic particle reinforced metal base composites, since used ceramic particle has There are higher hardness, usually the 2~10 of conventional metals wear-resistant material hardness times, be applied to composite roll set housing surface layer, The service life of roller set workspace is improved to greatest extent;Furthermore the enhancing block in the present invention is that sintering method is made, can Individually reach wear-resisting use condition, it can be preferably multiple with highly wear-resisting alloy steel molten steel (potting syrup) in the casting process of step 4 Merging is not broken up.

(4) wear-resisting workspace of the present invention is the 1/5~1/2 of whole roller set, effective saving wear-resistant material Cost, and its preset inner sleeve is built-in high tenacity middle low carbon steel or low-alloy steel, can be recycled and re-works use;

(5) high-pressure roller mill or vertical mill high abrasion cermet composite roll set prepared by the present invention, high abrasion close The casting region of golden steel molten steel enhances with preset inner sleeve and cermet and generates effective metallurgical bonding between block, no hole, Cracking phenomena;

(6) high abrasion cermet composite roll of the invention set after heat treatment, exists a large amount of in the tissue of housing pouring area MC, M2C-type carbide, both equally distributed carbide can be used as the main wear phase of housing pouring area;Outside workspace Metallurgical bonding occurs for coating metal Ceramic Composite block and workspace matrix, and ceramic particle is uniformly distributed in block, volume Score controlled range is in 25~50% (wt%), since ceramic high hard, high abrasion characteristic makes the wearability of its roll surface workspace It greatly promotes.

Detailed description of the invention

Fig. 1 is the long crucible structure schematic diagram that the present invention enhances block for sintering metal ceramic composite;

(a) enhance the crucible structure of block for being sintered cylinder metal ceramic composite for the embodiment of the present invention 1 Perspective view;

(b) enhance block from Fig. 1 (a) A-A cross-section structure for the cylinder metal ceramic composite of the embodiment of the present invention 1 Figure;

(c) enhance the sectional structure chart of block for the cuboid ceramic-metal composite of the embodiment of the present invention 3;

(d) enhance the sectional structure chart of block for six arris cylinder ceramic-metal composites of the embodiment of the present invention 4;

The structural schematic diagram of preset inner sleeve in Fig. 2, the embodiment of the present invention 3;

Enhance block in Fig. 3, the embodiment of the present invention 3 and is inserted into schematic diagram;

Housing is poured schematic diagram in Fig. 4, the embodiment of the present invention 3;

The high abrasion cermet composite roll set diagrammatic side-view cross-sectional structural schematic diagram prepared in Fig. 5, the embodiment of the present invention 3;

The high abrasion cermet composite roll set prepared in Fig. 6, the embodiment of the present invention 3 overlooks schematic cross-sectional view;

Vertical mill prepared by Fig. 7, the embodiment of the present invention 1 covers diagrammatic side-view cross-sectional structural representation with high abrasion cermet composite roll Figure;

High-pressure roller mill prepared by Fig. 8, the embodiment of the present invention 5 high abrasion cermet composite roll covers metal in housing and makes pottery Porcelain block interface electron probe picture;

The preset inner sleeve and housing that vertical mill prepared by Fig. 9, the embodiment of the present invention 2 high abrasion cermet composite roll covers Interface electron probe picture;

In attached drawing, 1 enhances block for cermet, and 1-1 is T-shape stainless steel part, and 1-2 is enhancing particle, and 1-3 is enhancing Wear resistant alloy powders in block, 2 be preset inner sleeve, and 3 be sand mold, and 4 be T-shape stainless steel trough, and 5 be groove, and 6 be housing Pouring area.

Specific embodiment

Below with reference to embodiment, the present invention is described in further detail.

Embodiment 1

A kind of high abrasion cermet composite roll set is a kind of compound tapered vertical grinding roll cover of high abrasion cermet, is used for In vertical mill comprising preset inner sleeve 2 and housing, the material of preset inner sleeve are 20 steel, and housing mould material is high-wear-resistant alloy Enhance block with ceramic-metal composite;Housing wall thickness is that high abrasion cermet composite roll covers the 1/2 of whole wall thickness;

The described ceramic-metal composite enhancing block 1 include enhancing particle 1-2, Cr, C wear resistant alloy powders 1-3 and T-shape stainless steel part 1-1;The WC particle is as reinforced phase, and Cr, C wear resistant alloy powders are as matrix, by quality Than WC particle: wear resistant alloy powders=1:4;The T-shape stainless steel part is fixing piece, specially 316L type;

The basis material of the described ceramic-metal composite enhancing block, ingredient that wear resistant alloy powders contain and each The mass percent of ingredient are as follows: C:1.0%, Si:1.0%, Cr:16%, Mo:0.5%, Ti:1.0%, W:4.0%, P: 0.02%, S:0.01%, remaining is iron and inevitable impurity.

It is tungsten-cobalt series hard alloy (WC+Co) that WC, which enhances particle, and chemical component is by weight percentage are as follows: WC:94%, Co:6.0%.

The mass percent of 20 steel of preset interior cover material, chemical component and each ingredient is C:0.02%, and surplus is Iron and inevitable impurity.

A kind of preparation method of high abrasion cermet composite roll set, specifically includes the following steps:

Step 1, the preparation of ceramic-metal composite enhancing block:

(1) ceramic-metal composite enhancing block used by enhancing ceramic phase particle be WC particle, partial size be 2~ 4mm, bending strength 1850MPa, hardness 92HRA.By weight, enhance particle: wear resistant alloy powders=1:4, weigh Enhance particle and wear resistant alloy powders, be put into mixed powder machine and mix powder, mixing time 2h obtains mixed material;

(2) part of the mixed material is put into cylindrical corundum crucible bottom, the T-shape stainless steel part bottom (316L) is Φ The disk of 40mm × 5mm, top are Φ 3mm × 120mm cylinder, and upside down uses mixture in Φ 50mm × 80mm crucible Material fills up crucible, the crucible for filling up material is obtained, as shown in Fig. 1 (a);

(3) crucible that will be filled with material, which is put into, first to be vacuumized, then passes in atmosphere protection stove of the argon gas as protection gas It is sintered, sintering temperature is 1100 DEG C, sintering time 8h, obtains ceramic-metal composite enhancing block, prepared Ceramic-metal composite enhances shown in block such as Fig. 1 (b).

Step 2, high abrasion cermet composite roll covers preset inner sleeve casting:

(1) 20 steel are selected, according to common pouring technology, the preset inner sleeve for carrying out high abrasion cermet composite roll set is poured Note, having a size of upper surface outer diameter 0.5m, internal diameter 0.4m, lower surface outer diameter 0.4m, internal diameter 0.3m, preset inner sleeve height 0.9m.

(2) oxide skin that high abrasion cermet composite roll covers preset inner sleeve surface is removed using machining mode, used Alcohol or acetone soln cleaning, the high abrasion cermet composite roll for obtaining size requirement cover preset inner sleeve.

Step 3, prepared by sand mold:

(1) internal diameter of sand mold is the outer diameter of high abrasion cermet composite roll set, and the height of sand mold is made pottery than high abrasion metal The height of porcelain composite roll set is high by 15%, meanwhile, bottom setting and the high abrasion cermet composite roll of sand mold cover outside preset inner sleeve The cylinder shape groove of the identical size of diameter, the depth of groove are the 5% of preset inner sleeve height.Use emergy, chromite sand, clay And suitable quantity of water, mixing, sand mold 3 is manufactured, sand mold uses prefabricated wood pattern molding, the quality hundred of raw material and each raw material that sand mold includes Divide ratio are as follows: molding sand: 75%, clay: 14%, surplus is water, and filling CO 2 gas solidifies after moulding, then takes wooden model Out.

The size of sand mold will be matched with the preset inner sleeve size in step 2, and sand mold internal diameter is 0.65m, thickness 0.3m, bottom Portion is reserved with the cylinder shape groove 5 of size identical as inner sleeve preset in step 2 lower surface outer diameter, and the depth of groove 5 is 0.045m.

Block is enhanced according to the ceramic-metal composite of high abrasion cermet composite roll set on the type cavity wall of sand mold T-shape stainless steel trough 4 is set, and the size and shape of T-shape stainless steel trough is determined according to T-shape stainless steel part.

(2) after sand mold makes, mold cavity surface brush oxygenerating aluminium fireproof coating, drying of lighting a fire, then be placed in baker and dry, Drying temperature is 300 DEG C, time 8h, stand-by after its cooling.

Step 4, high abrasion cermet composite roll set housing casting:

(1) WC particle enhancing Cr, C cermet enhancing block in step 1 is uniformly inserted into the designated position of sand mold.

(2) the preset inner sleeve for the high abrasion cermet composite roll set that step 2 casting obtains is placed in what step 3 manufactured In groove in sand mold, it will be preheated in whole push-in blast furnace, the casting mold after being preheated;Wherein, preheating temperature is 200 DEG C, preheating time 6h;

(3) with electric arc furnaces in 1500 DEG C of melting highly wear-resisting alloy steel molten steel, the chemical component of molten steel is according to weight percent Are as follows: C:1.0%, Mo:2.0%, Mn:0.5%, Cr:8.0%, V:3.0%, Si:1%, P:0.02%, S:0.01%, remaining is Fe and inevitable impurity carry out Metamorphism treatment to high alloy molten steel using refining deterioration agent before coming out of the stove.

(4) it after highly wear-resisting alloy steel molten steel is come out of the stove, is burnt and is infused using gravity, pouring temperature is 1400 DEG C, after being poured into preheating Casting mold housing pouring area 6 in, be cooled to room temperature, carry out sand removal processing, and ceramic-metal composite enhances block T-shape stainless steel part insertion sand mold part cut off, high abrasion cermet composite roll set after cooling will be obtained;

Step 5, the heat treatment of tapered Vertical Mill high abrasion cermet composite roll set:

(1) high abrasion cermet composite roll after cooling is covered in push-in high temperature furnace and is carried out at integral high-temperature diffusion annealing Reason, air-cooled, the high abrasion cermet composite roll set after being annealed;Wherein, annealing temperature is 1050 DEG C, and annealing time is 10h;

(2) composite roll set is quenched, hardening heat is 900 DEG C, air-cooled after heat preservation 9h;

(3) composite roll is covered and carries out tempering, tempering temperature is 550 DEG C, air-cooled after heat preservation 9h.

The high abrasion cermet composite roll set prepared through above-mentioned technique, as shown in fig. 7, housing cermet composite wood The matrix hardness of material enhancing block is 706HV, and ceramic particle hardness is 1509HV, and interface hardness is 1000HV, pouring area hardness 960HV, it is 4J/mm that composite roll, which covers impact flexibility,2, the shear strength between preset inner sleeve and housing is 500MPa.In this temperature Lower casting infiltration works well, and casting seeps region without end casting.The wear-resisting working region thickness of this high abrasion composite wood is controllable, ceramics Grain is evenly distributed, and improves the wearability of tapered vertical mill roller set to greatest extent, can reach vertical grinding roll cover under adverse circumstances Use condition.

Embodiment 2

A kind of high abrasion cermet composite roll set is a kind of high abrasion cermet roller sleeve of high pressure roller grinder, for height In pressure roller grinding machine comprising preset inner sleeve and housing, the material of preset inner sleeve are 20 steel, and housing mould material is high-wear-resistant alloy Enhance block with ceramic-metal composite;Housing wall thickness is that high abrasion cermet composite roll covers the 1/3 of whole wall thickness;

The ceramic-metal composite enhancing block includes enhancing particle, and Cr, Mn wear resistant alloy powders and T-shape are not Become rusty steel part;The ZTA ceramic particle is as reinforced phase, and Cr, Mn wear resistant alloy powders are as matrix, in mass ratio, ZTA ceramic particle: wear resistant alloy powders=1:4;The T-shape stainless steel part is fixing piece, specially 316L type;

The basis material of the described ceramic-metal composite enhancing block, ingredient that wear resistant alloy powders contain and each The mass percent of ingredient are as follows: C:6.0%, Si:0.1%, Cr:4.0%, Mo:10%, Ti:3.0%, W:2.0%, P: 0.02%, S:0.01%, remaining is iron and inevitable impurity.

Ceramic particle is selected as ZTA ceramic particle, and partial size is 10 mesh, the quality percentage of chemical component and each ingredient Than are as follows: Al2O3For 55~60%, ZrO2It is 35~39%, inevitable impurity≤1%.

The mass percent of 20 steel of preset interior cover material, chemical component and each ingredient is C:0.02%, and surplus is Iron and inevitable impurity.

A kind of preparation method of high abrasion cermet composite roll set, specifically includes the following steps:

Step 1, the preparation of ceramic-metal composite enhancing block:

(1) enhancing ceramic phase particle used by ceramic-metal composite enhancing block is ZTA ceramic particle, and partial size is 2~4mm, bending strength 1850MPa, hardness 92HRA.By weight, ZTA ceramic particle: wear resistant alloy powders=1: 2, enhancing particle and wear resistant alloy powders are weighed, is put into mixed powder machine and mixes powder, mixing time 3h obtains mixed material;

(2) part of the mixed material is put into cylindrical corundum crucible bottom, the T-shape stainless steel part bottom (316L) is Φ The disk of 40mm × 5mm, top are Φ 3mm × 120mm cylinder, and upside down uses mixture in Φ 50mm × 80mm crucible Material fills up crucible, obtains the crucible for filling up material;

(3) crucible that will be filled with material, which is put into, first to be vacuumized, then passes in atmosphere protection stove of the argon gas as protection gas It is sintered, sintering temperature is 1500 DEG C, sintering time 6h, obtains ceramic-metal composite enhancing block.

Step 2, high abrasion cermet composite roll covers preset inner sleeve casting:

(1) 20 steel are selected, according to common pouring technology, carry out pouring for the preset inner sleeve of high abrasion cermet composite roll set Note, having a size of outer diameter 0.5m, inner sleeve 0.4m, preset inner sleeve height 0.9m.

(2) oxide skin that high abrasion cermet composite roll covers preset inner sleeve surface is removed using machining mode, used Alcohol or acetone soln cleaning, the high abrasion cermet composite roll that specified size is made cover preset inner sleeve.

Step 3, prepared by sand mold:

(1) internal diameter of sand mold is the outer diameter of high abrasion cermet composite roll set, and the height of sand mold is made pottery than high abrasion metal The height of porcelain composite roll set is high by 10%, meanwhile, the bottom setting and the preset inner sleeve of high abrasion cermet composite roll set of sand mold The cylinder shape groove of the identical size of outer diameter, the depth of groove are the 3% of preset inner sleeve height.Using emergy, chromite sand, glue Soil and suitable quantity of water, mixing manufacture sand mold, and sand mold uses prefabricated wood pattern molding, the quality of raw material and each raw material that sand mold includes Percentage are as follows: molding sand: 80%, clay: 10%, surplus is water, and filling CO 2 gas solidifies after moulding, then by wooden model It takes out.

The size of sand mold will be matched with the preset inner sleeve size in step 2, and sand mold internal diameter is 0.65m, thickness 0.3m, bottom Portion is reserved with the cylinder shape groove of size identical as inner sleeve preset in step 2 lower surface outer diameter, and the depth of groove is 0.027m.

Block is enhanced according to the ceramic-metal composite of high abrasion cermet composite roll set on the type cavity wall of sand mold T-shape stainless steel trough is set, and the size and shape of T-shape stainless steel trough is determined according to T-shape stainless steel part.

(2) after sand mold makes, mold cavity surface brush oxygenerating aluminium fireproof coating, drying of lighting a fire, then sand mold is placed in baker Middle drying, drying temperature are 700 DEG C, time 2h, stand-by after its cooling.

Step 4, high abrasion cermet composite roll set housing casting:

(1) ZTA particle enhancing Cr, Mn cermet enhancing block in step 1 is uniformly inserted into the designated position of sand mold.

(2) the preset inner sleeve for the high abrasion cermet composite roll set that step 2 casting obtains is placed in what step 3 manufactured In groove in sand mold, it will be preheated in whole push-in blast furnace, the casting mold after being preheated;Wherein, preheating temperature is 600 DEG C, preheating time 2h;

(3) with electric arc furnaces in 1700 DEG C of melting highly wear-resisting alloy steel molten steel, the chemical component of molten steel is according to weight percent Are as follows: C:1.0%, Mo:2.0%, Mn:0.5%, Cr:16%, W:2.0%, Si:1.0%, P:0.02%, S:0.01%, remaining For Fe and inevitable impurity, Metamorphism treatment is carried out to high alloy molten steel using refining deterioration agent before coming out of the stove.

(4) it after highly wear-resisting alloy steel molten steel is come out of the stove, is burnt and is infused using gravity, pouring temperature is 1600 DEG C, after being poured into preheating Casting mold housing pouring area in, be cooled to room temperature, carry out sand removal processing, and ceramic-metal composite enhancing block The part of T-shape stainless steel part insertion sand mold is cut off, and high abrasion cermet composite roll set after cooling will be obtained;

Step 5, the heat treatment of high abrasion cermet composite high pressure roller mill roller set:

(1) high abrasion cermet composite roll after cooling is covered in push-in high temperature furnace and is carried out at integral high-temperature diffusion annealing Reason, air-cooled, the high abrasion cermet composite roll set after being annealed;Wherein, annealing temperature is 1400 DEG C, and annealing time is 10h;

(2) composite roll set is quenched, hardening heat is 1000 DEG C, air-cooled after heat preservation 10h;

(3) composite roll is covered and carries out tempering, tempering temperature is 450 DEG C, air-cooled after heat preservation 12h.

The high-pressure anti-wear machine composite roll set prepared through above-mentioned technique, housing ceramic-metal composite enhance the base of block Body hardness is 701HV, and ceramic particle hardness is 1400HV, and interface hardness is 980HV, and pouring area hardness is 920HV, composite roll set Impact flexibility is 8J/mm2, the shear strength between preset inner sleeve and housing is 650MPa.The gained composite wood after high temperature casting is seeped Material end is cracked, and enhancing ZTA particle and FeMnCr basal body interface in block is apparent metallurgical bonding, as the electronics of Fig. 9 is visited Shown in needle picture, therefore the roller sleeve of high pressure roller grinder that the method is prepared meets the use condition that high abrasion crushes.

Embodiment 3

A kind of high abrasion cermet composite roll set is a kind of high abrasion cermet composite high pressure roller mill roller set, is used In high-pressure roller mill comprising preset inner sleeve and housing, the material of preset inner sleeve are 20 steel, and housing mould material is high abrasion Alloy and ceramic-metal composite enhance block;Housing wall thickness is that high abrasion cermet composite roll covers the 1/4 of whole wall thickness;

The ceramic-metal composite enhancing block includes enhancing particle, and Cr, Mo wear resistant alloy powders and T-shape are not Become rusty steel part;The Al2O3White fused alumina+Al2O3Brown Alundum is as reinforced phase, and Cr, Mo wear resistant alloy powders are as base Body, in mass ratio, Al2O3White fused alumina: Al2O3Brown Alundum: wear resistant alloy powders=0.5:0.5:4;The T-shape stainless steel Part is fixing piece, specially 316L type;

The basis material of the described ceramic-metal composite enhancing block, ingredient that wear resistant alloy powders contain and each The mass percent of ingredient are as follows: C:1.5%, Si:0.5%, Cr:10%, Mo:10%, Ti:1.0%, Nb:3.0%, P: 0.02%, S:0.01%, remaining is iron and inevitable impurity.

Ceramic particle is selected as Al2O3White fused alumina+Al2O3Brown Alundum particle, partial size are 1~3mm, and chemical component is Al2O3: 99wt.% or more contains a small amount of iron oxide, silica etc. and inevitable impurity.

The mass percent of 20 steel of preset interior cover material, chemical component and each ingredient is C:0.02%, and surplus is Iron and inevitable impurity.

A kind of preparation method of high abrasion cermet composite roll set, specifically includes the following steps:

Step 1, the preparation of ceramic-metal composite enhancing block:

(1) enhancing ceramic phase particle used by ceramic-metal composite enhancing block is Al2O3White fused alumina+Al2O3Palm fibre Corundum in granules, partial size are 0.5~2mm, 3.6~3.8gcm of bulk density-3, elastic bullet amount be 350~370 × 106MPa, Fracture toughness is 1~5.0MPaM1/2, hardness be 1800~2000HV, thermal expansion coefficient is 7.0~8.4 × 10-6.By weight Than Al2O3White fused alumina: Al2O3Brown Alundum particle: wear resistant alloy powders=0.5:0.5:1 weigh enhancing particle and antifriction alloy Powder, is put into mixed powder machine and mixes powder, and mixing time 4h obtains mixed material;

(2) part of the mixed material is put into Noah's ark corundum crucible bottom, the T-shape stainless steel part bottom (316L) is 100mm The square piece of × 60mm × 5mm, top are Φ 3mm × 120mm cylinder, and upside down is used in 120mm × 80mm × 40mm crucible Mixed material fills up crucible, obtains the crucible for filling up material;

(3) crucible that will be filled with material, which is put into, first to be vacuumized, then passes in atmosphere protection stove of the argon gas as protection gas It is sintered, sintering temperature is 1200 DEG C, sintering time 20h, obtains ceramic-metal composite enhancing block, prepared Ceramic-metal composite enhances shown in block sectional structure chart such as Fig. 1 (c).

Step 2, high abrasion cermet composite roll covers preset inner sleeve casting:

(1) 20 steel are selected, carry out pouring for the preset inner sleeve of high abrasion cermet composite roll set according to common pouring technology Note, having a size of outer diameter 0.5m, internal diameter 0.4m, preset inner sleeve height 0.9m.

(2) oxide skin that high abrasion cermet composite roll covers preset inner sleeve surface is removed using machining mode, used Alcohol or acetone soln cleaning, prepared high abrasion cermet composite roll cover preset inner sleeve structural schematic diagram, such as Fig. 2 It is shown.

Step 3, prepared by sand mold:

(1) internal diameter of sand mold is the outer diameter of high abrasion cermet composite roll set, and the height of sand mold is made pottery than high abrasion metal The height of porcelain composite roll set is high by 5%, meanwhile, outside the preset inner sleeve that the bottom setting of sand mold is covered with high abrasion cermet composite roll The cylinder shape groove of the identical size of diameter, the depth of groove are the 8% of preset inner sleeve height.Use emergy, chromite sand, clay And suitable quantity of water, mixing, sand mold is manufactured, sand mold uses prefabricated wood pattern molding, the quality hundred of raw material and each raw material that sand mold includes Divide ratio are as follows: molding sand: 78%, clay: 12%, surplus is water, and filling CO 2 gas solidifies after moulding, then takes wooden model Out.

The size of sand mold will be matched with the preset inner sleeve size in step 2, and sand mold internal diameter is 0.65m, thickness 0.3m, bottom Portion is reserved with the cylinder shape groove of size identical as inner sleeve preset in step 2 lower surface outer diameter, and the depth of groove is 0.072m, such as Shown in Fig. 3.

Block is enhanced according to the ceramic-metal composite of high abrasion cermet composite roll set on the type cavity wall of sand mold T-shape stainless steel trough is set, and the size and shape of T-shape stainless steel trough is determined according to T-shape stainless steel part.

(2) after sand mold makes, mold cavity surface brush oxygenerating aluminium fireproof coating, drying of lighting a fire, then sand mold is placed in baker Middle drying, drying temperature are 500 DEG C, time 4h, stand-by after its cooling.

Step 4, high abrasion cermet composite roll set housing casting:

(1) by the Al in step 12O3White fused alumina+Al2O3It is uniform that Brown Alundum particle enhances Cr, Mo cermet enhancing block It is inserted into the designated position of sand mold, as shown in Figure 4.

(2) the preset inner sleeve for the high abrasion cermet composite roll set that step 2 casting obtains is placed in what step 3 manufactured In groove in sand mold, as shown in figure 4, by being preheated in whole push-in blast furnace, the casting mold after being preheated;Wherein, Preheating temperature is 500 DEG C, preheating time 3h;

(3) with electric arc furnaces in 1600 DEG C of melting highly wear-resisting alloy steel molten steel, the chemical component of molten steel is according to weight percent Are as follows: C:3.5%, Mo:2.0%, Mn:1.0%, Cr:2.0%, Ni:1.0%, W:2.0%, Si:1.0%, P:0.02%, S: 0.01%, remaining is Fe and inevitable impurity, carries out Metamorphism treatment to high alloy molten steel using refining deterioration agent before coming out of the stove.

(4) highly wear-resisting alloy steel molten steel is come out of the stove to be burnt using gravity and be infused, and pouring temperature is 1500 DEG C, pouring after being poured into preheating In the housing pouring area 6 of injection molding tool, it is cooled to room temperature, carries out sand removal processing, and " T " of ceramic-metal composite enhancing block The part of type stainless steel part insertion sand mold is cut off, and the side view for obtaining high abrasion cermet composite roll set after cooling is cutd open View, overhead sectional view difference are as shown in Figure 5,6;

Step 5, the heat treatment of high abrasion composite high pressure roller mill roller set:

(1) high abrasion cermet composite roll after cooling is covered in push-in high temperature furnace and is carried out at integral high-temperature diffusion annealing Reason, air-cooled, the high abrasion cermet composite roll set after being annealed;Wherein, annealing temperature is 1200 DEG C, and annealing time is 12h;

(2) composite roll set is quenched, hardening heat is 950 DEG C, air-cooled after heat preservation 9.5h;

(3) composite roll is covered and carries out tempering, tempering temperature is 350 DEG C, air-cooled after heat preservation 10 hours.

The high abrasion cermet composite roll set prepared through above-mentioned technique, ceramic-metal composite enhance the base of block Body hardness is 780HV, and ceramic particle hardness is 1590HV, and interface hardness is 1100HV, and pouring area hardness is 920HV, composite roll Set impact flexibility is 6J/mm2, the shear strength between preset inner sleeve and housing is 550MPa.What is prepared at this temperature is compound Gained composite material flawless generates after there is material more excellent wearability, high temperature casting to seep, and particle and basal body interface are smelting Gold combines, and apparent bonding interface layer occurs, and the composite material that the method is prepared meets the use condition of high abrasion.

Embodiment 4

A kind of high abrasion cermet composite roll set is a kind of high abrasion cermet composite high pressure roller mill roller set, is used In high-pressure roller mill comprising preset inner sleeve 2 and housing, the material of preset inner sleeve are 20 steel, and housing mould material is high resistance to Adjustment gold and ceramic-metal composite enhance block;Housing wall thickness is that high abrasion cermet composite roll covers the 1/ of whole wall thickness 2;

The ceramic-metal composite enhancing block 1 includes enhancing particle 1-2, Cr, Mo, Mn wear resistant alloy powders 1- 3 and T-shape stainless steel part 1-1;The B4C particle is as reinforced phase, and Cr, Mo, Mn wear resistant alloy powders are as base Body, in mass ratio, B4C particle: wear resistant alloy powders=1:3;The T-shape stainless steel part is fixing piece, specially 316L Type;

The basis material of the described ceramic-metal composite enhancing block, ingredient that wear resistant alloy powders contain and each The mass percent of ingredient are as follows: C:2.0%, Si:0.8%, Cr:5.0%, Mo:6.0%, Mn:20%, Ti:10%, Nb: 1.0%, P:0.02%, S:0.01%, remaining is iron and inevitable impurity.

Ceramic particle is selected as B4C particle, partial size are 0.1~2mm.

The mass percent of 20 steel of preset interior cover material, chemical component and each ingredient is C:0.02%, and surplus is Iron and inevitable impurity.

A kind of preparation method of high abrasion cermet composite roll set, specifically includes the following steps:

Step 1, the preparation of ceramic-metal composite enhancing block:

(1) enhancing ceramic phase particle used by ceramic-metal composite enhancing block is B4C particle, by weight, B4C particle: wear resistant alloy powders=1:3 weigh enhancing particle and wear resistant alloy powders, are put into mixed powder machine and mix powder, when mixing powder Between be 3h, obtain mixed material;

(2) part of the mixed material is put into hexagonal column shape corundum crucible bottom, the T-shape stainless steel part bottom (316L) is Φ The disk of 60mm × 5mm, top are Φ 3mm × 120mm cylinder, and upside down is 60mm, in the crucible of a height of 80mm in side length, Crucible is filled up with mixed material, obtains the crucible for filling up material;

(3) crucible that will be filled with material, which is put into, first to be vacuumized, then passes in atmosphere protection stove of the argon gas as protection gas It is sintered, sintering temperature is 1350 DEG C, sintering time 10h, obtains ceramic-metal composite enhancing block, prepared Ceramic-metal composite enhances shown in block such as Fig. 1 (d).

Step 2, high abrasion cermet composite roll covers preset inner sleeve casting:

(1) 20 steel are selected, carry out pouring for the preset inner sleeve of high abrasion cermet composite roll set according to common pouring technology Note, having a size of outer diameter 0.5m, internal diameter 0.4m, preset inner sleeve height 0.9m.

(2) oxide skin that high abrasion cermet composite roll covers preset inner sleeve surface is removed using machining mode, used Alcohol or acetone soln cleaning, the high abrasion cermet composite roll for obtaining size requirement cover preset inner sleeve.

Step 3, prepared by sand mold:

(1) internal diameter of sand mold is the outer diameter of high abrasion cermet composite roll set, and the height of sand mold is made pottery than high abrasion metal The height of porcelain composite roll set is high by 12%, meanwhile, the bottom setting and the preset inner sleeve of high abrasion cermet composite roll set of sand mold The cylinder shape groove of the identical size of outer diameter, the depth of groove are the 6% of preset inner sleeve height.Using emergy, chromite sand, glue Soil and suitable quantity of water, mixing manufacture sand mold, and sand mold uses prefabricated wood pattern molding, the quality of raw material and each raw material that sand mold includes Percentage are as follows: molding sand: 76%, clay: 13%, surplus is water, and filling CO 2 gas solidifies after moulding, then by wooden model It takes out.

The size of sand mold will be matched with the preset inner sleeve size in step 2, and sand mold internal diameter is 0.65m, thickness 0.3m, bottom Portion is reserved with the cylinder shape groove of size identical as inner sleeve preset in step 2 lower surface outer diameter, and the depth of groove is 0.054m.

Block is enhanced according to the ceramic-metal composite of high abrasion cermet composite roll set on the type cavity wall of sand mold T-shape stainless steel trough is set, and the size and shape of T-shape stainless steel trough is determined according to T-shape stainless steel part.

(2) after sand mold makes, mold cavity surface brush oxygenerating aluminium fireproof coating, drying of lighting a fire, then sand mold is placed in baker Middle drying, drying temperature are 600 DEG C, time 6h, stand-by after its cooling.

Step 4, high abrasion cermet composite roll set housing casting:

(1) by the B in step 14C particle enhancing Cr, Mo, Mn cermet enhancing block is uniformly inserted into the specific bit of sand mold It sets.

(2) the high abrasion cermet composite roll that step 2 casting obtains is covered into preset inner sleeve and is placed in the sand that step 3 manufactures In groove in type, it will be preheated in whole push-in blast furnace, the casting mold after being preheated;Wherein, preheating temperature 350 DEG C, preheating time 5h;

(3) with electric arc furnaces in 1500 DEG C of melting highly wear-resisting alloy steel molten steel, the chemical component of molten steel is according to weight percent Are as follows: C:3.0%, Mo:10%, Mn:0.5%, Cr:3%, V:10%, W:20%, Si:0.1%, P:0.02%, S:0.01%, Remaining is Fe and inevitable impurity, carries out Metamorphism treatment to high alloy molten steel using refining deterioration agent before coming out of the stove.

(4) it after highly wear-resisting alloy steel molten steel is come out of the stove, is burnt and is infused using gravity, pouring temperature is 1450 DEG C, after being poured into preheating Casting mold housing pouring area in, be cooled to room temperature, carry out sand removal processing, and ceramic-metal composite enhancing block The part of T-shape stainless steel part insertion sand mold is cut off, and high abrasion cermet composite roll set after cooling will be obtained;

Step 5, the heat treatment of high abrasion cermet composite high pressure roller mill roller set:

(1) high abrasion cermet composite roll after cooling is covered in push-in high temperature furnace and is carried out at integral high-temperature diffusion annealing Reason, air-cooled, the high abrasion cermet composite roll set after being annealed;Wherein, annealing temperature is 1100 DEG C, and annealing time is 10.5h;

(2) composite roll set is quenched, hardening heat is 920 DEG C, air-cooled after heat preservation 10h;

(3) composite roll is covered and carries out tempering, tempering temperature is 400 DEG C, air-cooled after heat preservation 11h.

It prepares cermet composite roll set through above-mentioned technique to have excellent performance, ceramic-metal composite enhances the base of block Body hardness is 800HV, and ceramic particle hardness is 1550HV, and interface hardness is 1090HV, and pouring area hardness is 940HV, composite roll Set impact flexibility is 7J/mm2, the shear strength between preset inner sleeve and housing is 600MPa.Due to ceramic particle and metal phase Between linear expansion coefficient mismatch, therefore during the preparation process generate abundant residues stress, pass through above-mentioned heat treatment end find The generation of formation of crack, improves the macro-mechanical property of material, and the composite roll set that the method is prepared meets high abrasion crushing Use condition.

Embodiment 5

A kind of high abrasion cermet composite roll set is a kind of high abrasion cermet roller sleeve of high pressure roller grinder, for height In pressure roller grinding machine comprising preset inner sleeve and housing, the material of preset inner sleeve are 20 steel, and housing mould material is high-wear-resistant alloy Enhance block with ceramic-metal composite;Housing wall thickness is that high abrasion cermet composite roll covers the 1/5 of whole wall thickness;

The ceramic-metal composite enhancing block includes enhancing particle, and W, V wear resistant alloy powders and T-shape are stainless Steel part;The TiC grains are as reinforced phase, and W, V wear resistant alloy powders are as matrix, in mass ratio, TiC Grain: wear resistant alloy powders=1:4;The T-shape stainless steel part is fixing piece, specially 316L type;

The basis material of the described ceramic-metal composite enhancing block, ingredient that wear resistant alloy powders contain and each The mass percent of ingredient are as follows: C:4.0%, Si:0.8%, Cr:5.0%, Ni:20%, V:10%, W:20%, P:0.02%, S:0.01%, remaining is iron and inevitable impurity.

Ceramic particle is selected as TiC particle, and partial size is 0.1~1mm.

The mass percent of 20 steel of preset interior cover material, chemical component and each ingredient is C:0.02%, and surplus is Iron and inevitable impurity.

A kind of preparation method of high abrasion cermet composite roll set, specifically includes the following steps:

Step 1, the preparation of ceramic-metal composite enhancing block:

(1) enhancing ceramic phase particle used by ceramic-metal composite enhancing block is TiC particle, by weight, Enhance particle: wear resistant alloy powders=1:4, weigh enhancing particle and wear resistant alloy powders, be put into mixed powder machine and mix powder, when mixing powder Between be 4h, obtain mixed material;

(2) part of the mixed material is put into hexagonal column shape corundum crucible bottom, the T-shape stainless steel part bottom (316L) is Φ The disk of 60mm × 5mm, top are Φ 3mm × 120mm cylinder, and upside down is 60mm, in the crucible of a height of 80mm in side length, Crucible is filled up with mixed material, obtains the crucible for filling up material;

(3) crucible that will be filled with material, which is put into, first to be vacuumized, then passes in atmosphere protection stove of the argon gas as protection gas It is sintered, sintering temperature is 1200 DEG C, sintering time 15h, obtains ceramic-metal composite enhancing block.

Step 2, high abrasion cermet composite roll covers preset inner sleeve casting:

(1) preferable 20 steel of toughness is selected, carries out the pre- of high abrasion cermet composite roll set according to common pouring technology The casting for setting inner sleeve, having a size of outer diameter 0.5m, internal diameter 0.4m, preset inner sleeve height 0.9m.

(2) oxide skin that high abrasion cermet composite roll covers preset inner sleeve surface is removed using machining mode, used Alcohol or acetone soln cleaning, the high abrasion cermet composite roll that specified size is made cover preset inner sleeve.

Step 3, prepared by sand mold:

(1) internal diameter of sand mold is the outer diameter of high abrasion cermet composite roll set, and the height of sand mold is made pottery than high abrasion metal The height of porcelain composite roll set is high by 15%, meanwhile, bottom setting and the high abrasion cermet composite roll of sand mold cover outside preset inner sleeve The cylinder shape groove of the identical size of diameter, the depth of groove are the 4% of preset inner sleeve height.Use emergy, chromite sand, clay And suitable quantity of water, mixing, sand mold is manufactured, sand mold uses prefabricated wood pattern molding, the quality hundred of raw material and each raw material that sand mold includes Divide ratio are as follows: molding sand: 75%, clay: 12%, surplus is water, and filling CO 2 gas solidifies after moulding, then takes wooden model Out.

The size of sand mold will be matched with the preset inner sleeve size in step 2, and sand mold internal diameter is 0.65m, thickness 0.3m, bottom Portion is reserved with the cylinder shape groove of size identical as inner sleeve preset in step 2 lower surface outer diameter, and the depth of groove is 0.036m.

Block is enhanced according to the ceramic-metal composite of high abrasion cermet composite roll set on the type cavity wall of sand mold T-shape stainless steel trough is set, and the size and shape of T-shape stainless steel trough is determined according to T-shape stainless steel part.

(2) after sand mold makes, mold cavity surface brush oxygenerating aluminium fireproof coating, drying of lighting a fire, then sand mold is placed in baker Middle drying, drying temperature are 400 DEG C, time 5h, stand-by after its cooling.

Step 4, high abrasion cermet composite roll set housing casting:

(1) by the designated position of TiC particle enhancing W, V cermet enhancing block insertion sand mold in step 1.

(2) the preset inner sleeve for the high abrasion cermet composite roll set that step 2 casting obtains is placed in what step 3 manufactured In groove in sand mold, it will be preheated in whole push-in blast furnace, the casting mold after being preheated;Wherein, preheating temperature is 350 DEG C, preheating time 5h;

(3) with electric arc furnaces in 1600 DEG C of melting highly wear-resisting alloy steel molten steel, the chemical component of molten steel is according to weight percent Are as follows: C:1.8%, Mo:5%, Mn:0.7%, Cr:5%, Nb:3%, Ti:20%, Si:0.5%, P:0.02%, S:0.01%, Remaining is Fe and inevitable impurity, carries out Metamorphism treatment to high alloy molten steel using refining deterioration agent before coming out of the stove.

(4) it after highly wear-resisting alloy steel molten steel is come out of the stove, is burnt and is infused using gravity, pouring temperature is 1500 DEG C, after being poured into preheating Casting mold housing pouring area in, be cooled to room temperature, carry out sand removal processing, and ceramic-metal composite enhancing block The part of T-shape stainless steel part insertion sand mold is cut off, and high abrasion cermet composite roll set after cooling will be obtained;

Step 5, the heat treatment of high abrasion cermet composite high pressure roller mill roller set:

(1) high abrasion cermet composite roll after cooling is covered in push-in high temperature furnace and is carried out at integral high-temperature diffusion annealing Reason, air-cooled, the high abrasion cermet composite roll set after being annealed;Wherein, annealing temperature is 1300 DEG C, and annealing time is 11h;

(2) composite roll set is quenched, hardening heat is 960 DEG C, air-cooled after heat preservation 9h;

(3) composite roll is covered and carries out tempering, tempering temperature is 450 DEG C, air-cooled after heat preservation 10h.

The high abrasion composite roll set prepared through above-mentioned technique, the matrix hardness that ceramic-metal composite enhances block are 790HV, ceramic particle hardness are 1400HV, and interface hardness is 1080HV, and pouring area hardness is 980HV, and composite roll set impact is tough Property is 5J/mm2, the shear strength between preset inner sleeve and housing is 520MPa.The composite material prepared at this temperature has More excellent wearability, gained composite material flawless generates after high temperature casting is seeped, and ceramic-metal composite enhances in block Enhancing particle and wear resistant interface is metallurgical bonding, and apparent bonding interface layer occurs, electron probe picture as shown in figure 8, The composite material that the method is prepared meets the use condition of high abrasion.

Embodiment 6

A kind of high abrasion cermet composite roll set, with embodiment 5, the difference is that, housing cermet composite wood It is to strengthen matrix, VC particle as reinforced phase that material enhancing block, which is using Cr, V, Mn, the high abrasion composite high pressure roller mill roller of preparation Set, preset inner sleeve use the preferable 20Cr steel of toughness.

The quality of ingredient and each ingredient that the wear resistant alloy powders of housing ceramic-metal composite enhancing block contain Percentage are as follows: C:4.0%, Si:0.6%, Cr:8%, Mo:20%, V:8.0%, Mn:15%, P:0.02%, S:0.01%, Yu Weitie and inevitable impurity.

A kind of preparation method of high abrasion cermet composite roll set, with embodiment 5, the difference is that:

The chemical component of the highly wear-resisting alloy steel molten steel material of casting is according to weight percent are as follows: C:3.0%, Mo: 6.0%, Mn:1%, Cr:8.0%, V:10%, Nb:1.0%, Ti:1.0%, Si:0.5%, P:0.02%, S:0.01%, Remaining is Fe and inevitable impurity, carries out Metamorphism treatment to high alloy molten steel using refining deterioration agent before coming out of the stove.

Embodiment 7

A kind of high abrasion cermet composite roll set, with embodiment 5, the difference is that, housing cermet composite wood Material enhancing block is to strengthen matrix, Mo with Cr, Ni, Mo2C particle is reinforced phase, the high abrasion composite high pressure roller mill roller of preparation Set.Preset inner sleeve uses the preferable 40CrMo steel of toughness.

The quality of ingredient and each ingredient that the wear resistant alloy powders of housing ceramic-metal composite enhancing block contain Percentage are as follows: C:2.0%, Si:1.0%, Cr:10%, Ni:10%, Mo:10%, P:0.02%, S:0.01%, remaining is iron And inevitable impurity.

A kind of preparation method of high abrasion cermet composite roll set, with embodiment 5, the difference is that:

The chemical component of the highly wear-resisting alloy steel molten steel material of casting is according to weight percent are as follows: C:2.8%, Mo:10%, Mn:0.5%, Cr:4.0%, V:2.0%, Nb:1.0%, Ti:3.0%, Si:0.5%, P:0.02%, S:0.01%, remaining is Fe and inevitable impurity carry out Metamorphism treatment to high alloy molten steel using refining deterioration agent before coming out of the stove.

Embodiment 8

A kind of high abrasion cermet composite roll set, with embodiment 5, the difference is that, housing cermet composite wood Material enhancing block is to strengthen matrix, ZrC particle as reinforced phase using W, Mn, the high abrasion composite high pressure roller mill roller set of preparation, in advance Inner sleeve is set using preferable 40 steel of toughness.

The quality of ingredient and each ingredient that the wear resistant alloy powders of housing ceramic-metal composite enhancing block contain Percentage are as follows: C:3.0%, Si:0.5%, Cr:5%, W:18%, Mn:20%, Nb:1.0%, P:0.02%, S:0.01%, Yu Weitie and inevitable impurity.

A kind of preparation method of high abrasion cermet composite roll set, with embodiment 5, the difference is that:

The chemical component of the highly wear-resisting alloy steel molten steel material of casting is according to weight percent are as follows: C:3.2%, Mo: 5.0%, Mn:0.6%, Cr:6.0%, V:10%, Nb:3%, Ti:2%, Si:0.5%, P:0.02%, S:0.01%, remaining For Fe and inevitable impurity, Metamorphism treatment is carried out to high alloy molten steel using refining deterioration agent before coming out of the stove.

Embodiment 9

A kind of housing cermet enhancing block is to strengthen matrix, Cr with Ni, Mn3C2Particle is that the high abrasion of reinforced phase is multiple Roller sleeve of high pressure roller grinder is closed, preset inner sleeve uses the preferable 42CrMoV steel of toughness.

The quality of ingredient and each ingredient that the wear resistant alloy powders of housing ceramic-metal composite enhancing block contain Percentage are as follows: C:2.5%, Si:0.3%, Cr:12%, Ni:18%, Mn:20%, Nb:3.0%, P:0.02%, S:0.01%, Remaining is iron and inevitable impurity.

A kind of preparation method of high abrasion cermet composite roll set, with embodiment 5, the difference is that:

The chemical component of the highly wear-resisting alloy steel molten steel material of casting is according to weight percent are as follows: C:2.9%, Mo: 4.0%, Mn:0.6%, Cr:3.0%, V:1.0%, W:5.0%, Ti:1.0%, Si:0.5%, P:0.02%, S:0.01%, Remaining is Fe and inevitable impurity, carries out Metamorphism treatment to high alloy molten steel using refining deterioration agent before coming out of the stove.

Embodiment 10

A kind of housing cermet enhancing block is that strengthen matrix, SiC particulate multiple as the high abrasion of reinforced phase using Ni, Mn, W Roller sleeve of high pressure roller grinder is closed, preset inner sleeve uses the preferable Q235 of toughness.

The quality of ingredient and each ingredient that the wear resistant alloy powders of housing ceramic-metal composite enhancing block contain Percentage are as follows: C:1.6%, Si:0.5%, W:10%, Mn:20%, Ni:8%, Nb:1.0%, P:0.02%, S:0.01%, Yu Weitie and inevitable impurity.

A kind of preparation method of high abrasion cermet composite roll set, with embodiment 5, the difference is that:

The chemical component of the highly wear-resisting alloy steel molten steel material of casting is according to weight percent are as follows: C:3.0%, Mo: 8.0%, Mn:0.8%, Cr:3.0%, V:10%, Ni:0.8%, W:12%, Ti:2.0%, Si:0.5%, P:0.02%, S: 0.01%, remaining is Fe and inevitable impurity, carries out Metamorphism treatment to high alloy molten steel using refining deterioration agent before coming out of the stove.

Claims (10)

1. a kind of high abrasion cermet composite roll set, which is characterized in that including preset inner sleeve and housing, the material of preset inner sleeve For common middle low carbon steel or low-alloy steel, housing mould material is that high-wear-resistant alloy and ceramic-metal composite enhance block; Housing wall thickness is that high abrasion cermet composite roll covers the 1/5 ~ 1/2 of whole wall thickness;
Wherein, the impact flexibility of the common middle low carbon steel or low-alloy steel is 21 ~ 100J/mm2
The mass percent of ingredient and each ingredient that the high-wear-resistant alloy contains are as follows: C:1.0% ~ 3.5%, Mo:2.0% ~ 10.0%, Mn:0.5 ~ 1.0%, Cr:2.0 ~ 16%, V:0 ~ 10.0%, Ni:0 ~ 1.0%, W:0 ~ 20%, Nb:0 ~ 3%, Ti:0 ~ 20%, Si:0.1% ~ 1%, P:0 ~ 0.02%, S:0 ~ 0.01%, remaining is Fe and inevitable impurity;
The ceramic-metal composite enhancing block includes enhancing particle, wear resistant alloy powders and stainless steel part fixing piece; The enhancing particle is as reinforced phase, and the wear resistant alloy powders are as matrix, in mass ratio, enhances particle: resistance to adjustment Bronze end=1:(1 ~ 4);
The enhancing particle is ceramic oxide particle and/or carbide ceramic particles;
Wherein, ceramic oxide particle are as follows: Al2O3White fused alumina particle, Al2O3Brown Alundum particle, ZrO2- Al2O3Particle;Carbide Ceramic particle are as follows: WC particle, SiC particulate, TiC particle, VC particle, B4C particle, Mo2C particle, ZrC particle, Cr3C2Particle, Average particle size range is 0.1 ~ 5mm;
In the ceramic-metal composite enhancing block, the quality hundred of ingredient and each ingredient that wear resistant alloy powders contain Divide ratio are as follows: C:1 ~ 6%, Si:0.1 ~ 1.0%, Cr:4 ~ 16%, Mo:0 ~ 10%, Mn:0 ~ 20%, Ti:0 ~ 10%, Ni:0 ~ 20%, V:0 ~ 10%, Nb:0 ~ 3%, W:0 ~ 20%, P:0 ~ 0.02%, S:0 ~ 0.01%, remaining is iron and inevitable impurity.
2. high abrasion cermet composite roll set as described in claim 1, which is characterized in that the common middle low carbon steel or One of low-alloy steel, specially Q235,20 steel, 20Cr steel, 40Cr steel, 40CrMo steel, 42CrMoV steel, 40 steel or 45 steel.
3. high abrasion cermet composite roll set as described in claim 1, which is characterized in that the stainless steel part fixing piece For T-shape stainless steel part fixing piece;T-shape stainless steel part is 316L type.
4. high abrasion cermet composite roll set as described in claim 1, which is characterized in that the high abrasion cermet of preparation Composite roll set, it is 700 ~ 900HV that housing ceramic-metal composite, which enhances the matrix hardness in block, and ceramic particle hardness is 1400 ~ 2400HV, interface hardness are 980 ~ 1300HV, and it is 4 ~ 8J/mm that composite roll, which covers impact flexibility,2, preset inner sleeve and housing it Between shear strength be 500 ~ 650MPa.
5. high abrasion cermet composite roll set as described in claim 1, which is characterized in that the high abrasion cermet of preparation Composite roll set is in high-pressure roller mill or vertical mill.
6. the preparation method of the set of high abrasion cermet composite roll described in any one of claim 1 ~ 5, which is characterized in that The following steps are included:
Step 1, the preparation of ceramic-metal composite enhancing block:
(1) according to the ratio, enhancing particle and wear resistant alloy powders are weighed, is put into mixed powder machine and mixes powder, mixing time is 2 ~ 4h, is obtained Mixed material;
(2) part of the mixed material is put into crucible bottom, T-shape stainless steel part upside down, will with mixed material in crucible Crucible fills up, and obtains the crucible for filling up material;
(3) it will be filled with the crucible of material using temperature programmed control sintering process, ceramic-metal composite, which is made, enhances block;
Step 2, high abrasion cermet composite roll covers preset inner sleeve casting:
(1) common middle low carbon steel or low-alloy steel are selected, is poured according to common pouring technology, the height for obtaining size requirement is resistance to Grind the preset inner sleeve of cermet composite roll set;
(2) surface of the preset inner sleeve of high abrasion cermet composite roll set is surface-treated, obtains the accurate surface of size The preset inner sleeve of smooth high abrasion cermet composite roll set;
Step 3, prepared by sand mold:
(1) sand mold raw material being weighed according to proportion, after mixing, manufactures sand mold, sand mold uses prefabricated wood pattern molding, after moulding, Filling CO 2 gas is solidified, and is then taken out prefabricated wooden model, the sand mold after obtaining moulding;
The size of sand mold and the size of the high abrasion cermet composite roll of preparation set match, specifically: the internal diameter of sand mold is The outer diameter of high abrasion cermet composite roll set, the height of sand mold is higher by 5 ~ 15% than the height that high abrasion cermet composite roll covers, Meanwhile the cylindrical recessed of size identical as the preset inner sleeve outer diameter that high abrasion cermet composite roll covers is arranged in the bottom of sand mold Slot, the depth of groove are the 3 ~ 8% of preset inner sleeve height, according to high abrasion cermet composite roll set on the type cavity wall of sand mold Ceramic-metal composite enhancing block be arranged T-shape stainless steel trough, the size and shape of T-shape stainless steel trough It is determined according to T-shape stainless steel part;
(2) it by the sand mold mold cavity surface brush fireproof coating after moulding, after igniting is dry, then is placed in baker and dries, after cooling, Obtain cooling sand mold;
Step 4, high abrasion cermet composite roll set housing casting:
(1) cermet prepared in step 1 enhancing block is uniformly inserted into the inner wall surrounding of sand mold;
(2) the preset inner sleeve for the high abrasion cermet composite roll set that step 2 casting obtains is placed in the sand mold that step 3 manufactures In groove in, will be preheated in whole push-in blast furnace, the casting mold after being preheated;Wherein, preheating temperature be 200 ~ 600 DEG C, preheating time is 2 ~ 6h;
(3) in 1500 ~ 1700 DEG C of progress meltings, highly wear-resisting alloy steel molten steel is obtained, casting of coming out of the stove;The highly wear-resisting alloy steel The mass percent of chemical component and each chemical component that molten steel contains are as follows: C:1.0% ~ 3.5%, Mo:2.0% ~ 10.0%, Mn: 0.5 ~ 1.0%, Cr:2.0 ~ 16%, V:0 ~ 10.0%, Ni:0 ~ 1.0%, W:0 ~ 20%, Nb:0 ~ 3%, Ti:0 ~ 20%, Si:0.1% ~ 1%, P:0 ~ 0.02%, S:0 ~ 0.01%, remaining is Fe and inevitable impurity;
(4) after highly wear-resisting alloy steel molten steel is come out of the stove, using gravity-assist pouring, pouring temperature is 1400 ~ 1600 DEG C, is poured into preheating In casting mold afterwards, it is cooled to room temperature, carries out sand removal processing, and not by the T-shape of ceramic-metal composite enhancing block The part of rust steel part insertion sand mold is cut off, and high abrasion cermet composite roll set after cooling will be obtained;
Step 5, high abrasion cermet composite roll set heat treatment:
(1) high abrasion cermet composite roll after cooling is covered in push-in high temperature furnace and carries out integral high-temperature diffusion annealing processing, It is air-cooled, the high abrasion cermet composite roll set after being annealed;Wherein, annealing temperature is 1050 ~ 1400 DEG C, and annealing time is 10~12h;
(2) the high abrasion cermet composite roll set after annealing is quenched, it is multiple obtains quenched high abrasion cermet Close roller set;Wherein, hardening heat is 900 ~ 1000 DEG C, keeps the temperature 9 ~ 10h;
(3) quenched high abrasion cermet composite roll set is tempered, obtains high abrasion cermet composite roll set;Its In, tempering temperature is 350 ~ 550 DEG C, keeps the temperature 9 ~ 12h.
7. the preparation method of high abrasion cermet composite roll set as claimed in claim 6, which is characterized in that the step In 1 (3), the temperature programmed control sintering process, specifically: the crucible that will be filled with material, which is put into atmosphere protection stove, to be sintered, Protective atmosphere is argon gas, and sintering temperature is 1100 ~ 1500 DEG C, and sintering time is 6 ~ 20h, obtains ceramic-metal composite enhancing Block;The protection stove is first to vacuumize, and then passes to argon gas, forms argon atmosphere.
8. the preparation method of high abrasion cermet composite roll set as claimed in claim 6, which is characterized in that the step In 2 (2), the surface treatment, specifically: it is preset interior using machining process removal high abrasion cermet composite roll set The surface scale of set is cleaned to clean surface with alcohol or acetone soln, and guarantees high abrasion cermet composite roll The dimensional accuracy of the preset inner sleeve workpiece of set.
9. the preparation method of high abrasion cermet composite roll set as claimed in claim 6, which is characterized in that the step In 3 (1), the mass percent of raw material and each raw material that the sand mold includes are as follows: molding sand: 75 ~ 80%, clay: 10 ~ 14%, Surplus is water, and molding sand is the mixing of one or more of zircon sand, emergy, chromite sand.
10. the preparation method of high abrasion cermet composite roll set as claimed in claim 6, which is characterized in that the step In rapid 3 (2), the fireproof coating is alumina powder, and the drying, temperature is 300 ~ 700 DEG C, and the time is 2 ~ 8h.
CN201810259717.6A 2018-03-27 2018-03-27 A kind of high abrasion cermet composite roll set and preparation method thereof CN108342657B (en)

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