CN109440001A - A kind of multi-element low alloy wear resistant cast steel and preparation method thereof containing nanocrystalline austenite - Google Patents
A kind of multi-element low alloy wear resistant cast steel and preparation method thereof containing nanocrystalline austenite Download PDFInfo
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C33/00—Making ferrous alloys
- C22C33/04—Making ferrous alloys by melting
- C22C33/06—Making ferrous alloys by melting using master alloys
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- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21C—PROCESSING OF PIG-IRON, e.g. REFINING, MANUFACTURE OF WROUGHT-IRON OR STEEL; TREATMENT IN MOLTEN STATE OF FERROUS ALLOYS
- C21C7/00—Treating molten ferrous alloys, e.g. steel, not covered by groups C21C1/00 - C21C5/00
- C21C7/0006—Adding metallic additives
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/001—Ferrous alloys, e.g. steel alloys containing N
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/002—Ferrous alloys, e.g. steel alloys containing In, Mg, or other elements not provided for in one single group C22C38/001 - C22C38/60
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- C22C—ALLOYS
- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/005—Ferrous alloys, e.g. steel alloys containing rare earths, i.e. Sc, Y, Lanthanides
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- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/02—Ferrous alloys, e.g. steel alloys containing silicon
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- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
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- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/04—Ferrous alloys, e.g. steel alloys containing manganese
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- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
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- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/06—Ferrous alloys, e.g. steel alloys containing aluminium
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- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/18—Ferrous alloys, e.g. steel alloys containing chromium
- C22C38/24—Ferrous alloys, e.g. steel alloys containing chromium with vanadium
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- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/18—Ferrous alloys, e.g. steel alloys containing chromium
- C22C38/26—Ferrous alloys, e.g. steel alloys containing chromium with niobium or tantalum
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/18—Ferrous alloys, e.g. steel alloys containing chromium
- C22C38/28—Ferrous alloys, e.g. steel alloys containing chromium with titanium or zirconium
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
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Abstract
The invention discloses a kind of preparation methods of multi-element low alloy wear resistant cast steel containing nanocrystalline austenite, use steel scrap, ferrosilicon, manganese iron and ferrochrome for raw material, melting medium carbon low alloy steel, polynary microalloy combined processing is carried out in fusion process, and casting obtains multi-element low alloy wear resistant cast steel；Then the alternating temperature quenching treatment of superhigh temperature, high temperature, high temperature is carried out to it to get to the multi-element low alloy wear resistant cast steel containing nanocrystalline austenite.Multi-element low alloy wear resistant cast steel of the present invention is after polynary microalloy combined processing, solidified structure obviously refines, after the alternating temperature of further superhigh temperature, high temperature and high temperature quenching treatment, obtain the heterogeneous structure of martensite plus nano crystalline substance austenite, have the characteristics that hardness is high, wearability is good and obdurability is good, with good using effect, promoting and applying has good economic and social benefit.
Description
Technical field
The invention belongs to wear-resistant material technical fields, are related to a kind of multi-element low alloy wear resistant casting containing nanocrystalline austenite
Steel, the invention further relates to the preparation methods of the above-mentioned multi-element low alloy wear resistant cast steel containing nanocrystalline austenite.
Background technique
Low-alloy wear-resistant steel has production technology easy, and the advantages such as low production cost have extensively in wear-resistant material field
General application prospect.
In order to improve the comprehensive performance of low-alloy wear-resistant steel, Chinese invention patent is " a kind of to prepare low conjunction using electric arc furnaces
The method of golden high-ductility abrasion-proof cast steel " (application number CN201410241277.3, publication number CN103981449A, publication date
2014.08.13 a kind of method for preparing low-alloy high-ductility abrasion-proof cast steel using electric arc furnaces) is disclosed, low-sulfur phosphorus furnace charge, benefit are selected
With melting in acid arc furnace molten steel, external refining, high annealing, primary quenching+tempering prepare low-alloy high-ductility abrasion-proof cast steel
Method, this method process is few, high-efficient, and at low cost, the low-alloy cast steel hardness of preparation is high, wearability is good, while good toughness,
It can be used for workpiece used in the fields such as cement building material, mine and coal burning power, such as lining board of grinder, grate plate and blind plate.These
Workpiece is often broken because toughness is insufficient, not only by the impact force action of abrasive material, but also by the frictional force of abrasive material due to wear-resisting
Property insufficient and Fast Wearing failure phenomenon.The high-ductility abrasion-proof low-alloy steel material of this method preparation can effectively prevent the disconnected of workpiece
Split with Fast Wearing Problem of Failure, and preparation section is few, high-efficient, at low cost, has preferable popularization and application foreground.Middle promulgated by the State Council
Bright patent " a kind of preparation method of Low-alloy high-wear-resistancecast cast steel plate " (application number CN201310040622.2, publication number
CN103266276A, publication date 2013.08.28) also disclose a kind of preparation method of Low-alloy high-wear-resistancecast cast steel plate, comprising with
Lower component: C:0.25-0.35wt.%；Si:0.9-1.6wt.%；Mn:0.3-1.8wt.%；Cr:0.7-1.0wt.%；Mo:
0.15-0.3wt.%；Ti:0.05-0.35wt.%；Nb:0.01-0.05wt.%；V:0.05-0.25wt.%；RE:0.01-
0.1wt.%；P, S≤0.03wt.%, remaining is Fe；Casting and forming after each component is melted, then ingot casting is put by treated
It wherein heats up, is kept the temperature when temperature reaches 1050~1070 DEG C, ingot casting is put into 240~245 DEG C of salt again after the completion of heat preservation
It is kept the temperature, is finally come out of the stove air-cooled in liquid furnace.The invention casting and heat treatment process are more simple and easy to control, at low cost, obtained
Material has good combination of strength and toughness.Chinese invention patent " low-alloy wear-resistant steel heat treatment process " (application number
CN201310536283.7, publication number CN104611524A, publication date 2015.05.13) also disclose a kind of low-alloy abrasion-proof casting
Steel heat treatment process, comprising the following steps: (1) it chooses steel scrap (and melt down useless steel-casting) and is cut to suitable lumpiness,
Lumpiness size is depending on the capacity of stove, under normal circumstances, the full-size of furnace charge should be no more than furnace diameter three/
One, melting is carried out in 0.5t medium-frequency induction furnace；(2) wherein materials such as manganese iron, ferrochrome, ferrosilicon and manganese metal, Ying 800
DEG C (burning under red state) baking, baking time should be no less than 3 hours, the materials such as ferrosilicon powder and silicon calcium powder, Ying 200 DEG C~300
Heat drying at a temperature of DEG C, drying time should be no less than 3 hours, after novel abrasion resistant cast steel optimization at being grouped as: be added not
Cr more than 2.3%, the composition range of carbon are determined as 0.25%~0.35%, and the composition range of silicon is determined as 1.50%~
The content of 2.50%, Mn are determined as 0.80%~1.20%, and the content of chromium is determined as 1.5%~2.5%, and furnace temperature will be controlled strictly
System is at 1580~1600 DEG C, and using wax-pattern and resin sand casting and forming, pouring temperature is greater than 1480 DEG C；It (3) will be in step (2)
Material is heated to critical-temperature (Ac3) or more, generally Ac3+75 DEG C~Ac3+100 DEG C, is kept the temperature 30min~60min, is made to be carbonized
Object dissolves and homogenizes austenite, and carries out air cooling to be greater than critical cooling rate；(4) by the material in step (3)
In Ac1 temperature heating below, heat preservation, generally 200 DEG C~300 DEG C tempering 2h are simultaneously cooling with appropriate speed.Chinese invention is special
Benefit " a kind of low-alloy wear-resistant steel material and preparation method thereof " (application number CN201410271029.3, publication number
CN104046893A, publication date 2014.09.17) also disclose a kind of low-alloy wear-resistant steel material and preparation method thereof, the material
Material has following alloying element and mass percent: C:0.2-0.4%, Si:0.4-1.0%, Mn:0.8-1.3%, Ni:
0.3-0.7%, Mo:0.3%-0.5%, Nb:0.03%-0.06%, remaining is Fe.This method has following process and step
Rapid: raw material is prepared alloy using the method that electric arc melting prepares alloy by a., through high temperature diffusion annealing；Alloy structure is ferrite
With pearlite and a small amount of granular bainite；B. by the sample normalizing after high temperature diffusion annealing, Brinell hardness reaches 220 after normalizing
~290HBS；Sample after normalizing is tempered at 590 DEG C, obtains Brinell hardness >=200HBS after tempering, tensile strength >=550MPa,
Elongation >=15%, friction ratio are≤2.7 × 10-5The low-alloy wear-resistant steel material of mg/Nm.The invention material is suitable for mine
Mechanical wear-resisting spare part has preferably comprehensive mechanical property, and use scope is wider, the economic advantages such as low in cost.Middle promulgated by the State Council
Bright patent " a kind of economical low-alloy wear-resistant steel and its heat treatment process " (application number CN201310568551.3, publication number
CN103556053A, publication date 2014.02.05) a kind of economical low-alloy wear-resistant steel is also disclosed, there is following ingredient
And mass percent: C:0.10-0.30%, Mn:0.5-1.5%, Ni:0.3-1.0%, Nb:0.01-0.05%, Si≤
0.5%, P≤0.03%, S≤0.03%, surplus are Fe and inevitable impurity.Its room temperature texture is ferrite and pearly-lustre
Body, and the content of pearlite is 20-30%.Its room temperature tensile intensity is 540-580MPa, and elongation is 20% or more.By adopting
With traditional conventional smelting process, through ingredient melting, after cast molding, then return through 850-900 DEG C of normalizing and 560-620 DEG C
Fire processing obtains.Chinese invention patent " multi-element low alloy wear resistant cast steel and preparation method thereof " (application number
CN201310271443.X, publication number CN103397278A, publication date 2013.11.20) to also disclose a kind of multi-element low alloy resistance to
Grind cast steel, the chemical component and its mass percent of cast steel are as follows: carbon 0.20-0.26, manganese 1.15-1.35, silicon 1.75-1.90, phosphorus
≤ 0.040, sulphur≤0.040, nickel 0.60-0.75, vanadium 0.25-0.35, Mo0.03-0.05, Zn0.58-0.91, In0.2-0.3,
As0.15-0.18, Sb0.05-0.06, Bi0.09-0.12, matrix are iron.The invention has preferable mechanical mechanics property, with
Low price silicon, manganese are main alloy element, can manufacture the wear resisting parts such as ball grinding machine lining board, excavator bucket teeth.Chinese invention patent " one
Kind Low-alloy high-wear-resistancecast cast steel " (application number CN201310040624.1, publication number CN103060705A, publication date
2013.04.24 a kind of Low-alloy high-wear-resistancecast cast steel) is also disclosed, includes following components: C:0.25-0.35wt.%；Si:0.9-
1.6wt.%；Mn:0.3-1.8wt.%；Cr:0.7-1.0wt.%；Mo:0.15-0.3wt.%；Ti:0.05-0.35wt.%；
Nb:0.01-0.05wt.%；V:0.05-0.25wt.%；RE:0.01-0.1wt.%；P, S≤0.03wt.%, remaining for Fe and
Inevitable impurity.Invention preparation is simple, and has good combination of strength and toughness.
Chinese invention patent " a kind of preparation method of Low-alloy high-wear-resistancecast cast steel " (application number CN201310040604.4,
Publication number CN103060704A, publication date 2013.04.24) a kind of preparation method of Low-alloy high-wear-resistancecast cast steel is also disclosed, it wraps
Containing following components: C:0.25-0.35wt.%；Si:0.9-1.6wt.%；Mn:0.3-1.8wt.%；Cr:0.7-1.0wt.%；
Mo:0.15-0.3wt.%；Ti:0.05-0.35wt.%；Nb:0.01-0.05wt.%；V:0.05-0.25wt.%；RE:
0.01-0.1wt.%；P, S≤0.03wt.%, remaining is Fe；Casting and forming after each component is melted, then will treated casting
It is put into and wherein heats up, kept the temperature when temperature reaches 1050~1070 DEG C, casting is put into 240~245 again after the completion of heat preservation
It is kept the temperature, is finally come out of the stove air-cooled in DEG C salt bath furnace.The invention casting and heat treatment process are more simple and easy to control, at low cost, system
The material obtained has good combination of strength and toughness.A kind of Chinese invention patent " high intensity low-cost dilute alloy wear resistant cast steel " (application
Number CN201110425482.1, publication number CN102517499A, publication date 2012.06.27) one kind is also disclosed with silicon, manganese is
Main alloy element can manufacture the low-cost high-strength abrasion resistant cast steel of the wear resisting parts such as ball grinding machine lining board, excavator bucket teeth, institute
State the chemical component and its mass percent of cast steel are as follows: C:0.2-0.6；Si:0.5-1.5；Mn:0.5-1.5；Cr:0.5-1.5；
Ti:< 0.20；RE:< 0.20；B:< 0.015；Ca:< 0.15；Al:< 0.15, the cast steel first carry out at 950 ± 10 DEG C
Quenching, then tempering is carried out at 200 ± 10 DEG C, tensile strength is greater than 1550MPa, and impact flexibility is greater than 90J/cm2, break
Toughness is split greater than 80Mpa.m1/2, hardness is greater than 52HRC.A kind of Chinese invention patent " pump boric low alloy wear resistant steel " (application
Number CN201110324456.X, publication number CN102367558A, publication date 2012.03.07) to also disclose a kind of pump boracic low
Alloy abrasion resistant steel, chemical component (wt.%) by weight percentage are as follows: C, 0.33；Mn, 1.20；Si, 1.30；Cr, 1.35；Mo,
0.30；Ni, 0.40；N, 0.05；B, 0.002~0.0025；Y, 0.002~0.003；Remaining is Fe and inevitable impurity,
Invention pump boron-containing low alloy wear-resistant steel-casting phenolic sand molding, obtained after the heat treatment that casting is quenched+is tempered intensity,
Hardness is high, the pump boron-containing multi-element low alloy wear resistant cast steel of tissue and function admirable.The invention has hardness height, toughness effect
Well, the advantages such as wearability is high, and has certain corrosion resistance concurrently, simple production process, and production cost is low.Chinese invention patent
" a kind of dilute alloy Mn series bainite wear resistant cast steel " (application number CN201110424710.3, publication number CN102517505A, it is open
Day 2012.06.27) also disclose a kind of dilute alloy Mn series bainite wear resistant cast steel, the chemical component and its matter of the cast steel
Measure percentage are as follows: C:0.32-0.41；Si:0.22-0.23；Mn:0.46-0.62；Cr:0.99-1.03；Mo:0.49-0.54；B:
0.0024-0.0040, the cast steel is air-cooled after 900 DEG C of austenitizings, then in 220 DEG C of lonneals, and tensile strength >=
2020MPa, hardness: 51-54HRC, elongation percentage >=5.2%, non-notch impact flexibility: 80-160J/cm2, which can be used for making
Make wearing piece of the crushing in powder manufacturing apparatus of the industries such as various mines, building materials, power generation, such as coal washer tooth plate, tooth rod, jump bit
Various heavy calibers used in product and above-mentioned industry transmit wear-resistant pipe.A kind of Chinese invention patent " low alloy manganese series time
The preparation method of fiery martensite wear resistant cast steel " (application number CN201010228506.X, publication number CN101880828A, publication date
2010.11.10 a kind of preparation method of low-alloy manganese martensite wear resistant cast steel) is also disclosed, low-alloy abrasion-proof is belonged to
Cast steel preparation technical field.The invention uses Mn for main alloy element, adds a small amount of Si, Cr, Cu, B and rare earth element
Alloying elements such as (La, Ce, Nb, Pr), remaining is Fe.It is smelted using conventional process for making, after casting and forming, after austenitizing
Water quenching reheats, heat preservation, carries out lonneal processing.The abrasion resistant cast steel of invention production, tissue is tempering horse after water quenching tempering
Family name's body.The tensile strength Rm > 1800MPa of cast steel is, it is specified that nonproportional cyclic straining Rp0.2 > 1600MPa, elongation after fracture A >
5%, non-notch impact toughness ak> 150J/cm2, U-shaped notch shock function aKU> 20J/cm2.The wear-resistant steel alloy constituent content
It is few, combination of strength and toughness and excellent wear-resisting property, simple process and low cost, can be used for manufacturing bucket tooth, tup, tooth plate, liner plate,
The wear-resistant cast steel parts such as creeper tread.Chinese invention patent " preparation process of low-alloy wear-resistant steel without high temperature heat treatment " (application number
CN200510018473.5, publication number CN1667136A, publication date 2005.09.14) also disclosing one kind, to exempt from high-temperature heat treatment low
The preparation process of alloy wear-resisting cast steel, it is a kind of low-alloy wear-resistant steel that low energy consumption, mechanical performance is high.The invention is in alloy
Micro or a small amount of element that heat treatment C curve can be made to move to right significantly is added in ingredient.The molten steel of melting qualification is injected in casting mold,
The setting temperature of control casting takes out casting when the temperature of casting is down to certain value from casting mold, in water of quenching；Temperature drop
When to 100 DEG C or less, casting is taken out from water；It is tempered at a temperature of 200~300 DEG C.The invention eliminates high-temperature heat treatment,
Electric energy or fuel oil can largely be saved；High temperature thermal treatment can be saved；Substantially improve the working condition of worker；Avoid alloy
Oxidization burning loss of the material in high-temperature heat treatment process；The production cycle for greatly shortening casting, increase substantially labor productivity.
The loss of metal material can be reduced；Reduce pollution of the heat treatment to environment.
But the various low-alloy wear-resistant steels succeeded in developing at present, matrix majority is based on martensitic matrix, tool
There is the features such as hardness height and good wearability, but that there are brittleness is big for martensite, leads to that low-alloy wear-resistant steel plasticity is low, toughness
Difference.
Summary of the invention
The object of the present invention is to provide a kind of preparation method of multi-element low alloy wear resistant cast steel containing nanocrystalline austenite, solutions
It has determined the existing low-alloy wear-resistant steel based on martensitic matrix, the problem of plasticity is low, poor toughness.
It is a further object of the present invention to provide the systems using the above-mentioned multi-element low alloy wear resistant cast steel containing nanocrystalline austenite
Multi-element low alloy wear resistant cast steel containing nanocrystalline austenite made from Preparation Method.
The technical scheme adopted by the invention is that a kind of preparation of the multi-element low alloy wear resistant cast steel containing nanocrystalline austenite
Method uses steel scrap, ferrosilicon, manganese iron and ferrochrome for raw material, carbon and low-alloy in melting, and it is multiple that polynary microalloy is carried out in fusion process
Conjunction processing, casting obtain multi-element low alloy wear resistant cast steel；Then at the alternating temperature quenching for carrying out superhigh temperature, high temperature, high temperature to it
It manages to get the multi-element low alloy wear resistant cast steel containing nanocrystalline austenite is arrived.
The features of the present invention also characterized in that
A kind of preparation method of the multi-element low alloy wear resistant cast steel containing nanocrystalline austenite, it is specifically real according to the following steps
It applies:
Step 1, use steel scrap, ferrosilicon, manganese iron and ferrochrome for raw material, then the melting medium carbon low alloy steel in electric furnace will
The molten steel that melting obtains is come out of the stove to ladle, has been previously added multi-nary alloy particles in ladle；
Step 2, after the molten steel in ladle is skimmed, stood, molten steel is poured into casting mold, when casting temperature in casting mold by cooling
After 400 DEG C, casting is taken out, through polishing, sand removal, obtains multi-element low alloy wear resistant cast steel casting；
Step 3, superhigh temperature, high temperature, high temperature are successively carried out to multi-element low alloy wear resistant cast steel casting that step 2 obtains
Alternating temperature is quenched to arrive the multi-element low alloy wear resistant cast steel containing nanocrystalline austenite.
Wherein the chemical composition of molten steel and its mass fraction are controlled in 0.28-0.37%C, 0.54- in electric furnace in step 1
0.71%Mn, 1.55-1.74%Si, 1.04-1.28%Cr, < 0.032%P, < 0.027%S, surplus Fe, the above chemical group
It is 100% at the sum of mass fraction.
By molten steel heating to 1658-1674 DEG C before molten steel is come out of the stove to ladle in step 1.
The size of multi-nary alloy particles is 3.5-6.3mm in step 1.
Multi-nary alloy particles additional amount accounts for the 3.1-3.4% into steel quality score in ladle, multicomponent alloy in step 1
The chemical composition and its mass fraction of particle are 5.57-6.22%Ce, 3.85-4.39%Ti, 2.83-3.17%N, 2.04-
2.65%V, 1.68-1.87%Ta, 12.06-12.71%Ba, 5.14-5.68%Ca, 18.33-19.27%Al, 1.62-
1.85%Mg, surplus Si, the sum of above chemical composition mass fraction are 100%.
In step 2 when liquid steel temperature is down to 1502-1527 DEG C, molten steel is poured into casting mold.
Hyperthermic temperature is 1050-1065 DEG C in step 3, and high-temperature temperature is 900-915 DEG C, and high temperature temperature is 195-
210℃。
Alternating temperature is quenched in step 3, specifically: multi-element low alloy wear resistant cast steel casting will be obtained through step 2, with furnace plus
Heat to 1050-1065 DEG C, heat preservation 15-18 minute after, be furnace-cooled to temperature be 980-995 DEG C, keep the temperature 25-30 minutes after, come out of the stove into
Water cooling is carried out in the pond that water temperature is 20-32 DEG C；After cast(ing) surface temperature reaches 550-630 DEG C, casting is taken out from pond,
It immediately enters after being reheated to 900-915 DEG C, heat preservation 100-120 minutes in heating furnace of the in-furnace temperature greater than 500 DEG C, comes out of the stove
Enter and carries out water cooling in the pond that water temperature is 25-35 DEG C；When cast(ing) surface temperature be 190-210 DEG C, casting is taken out from pond, stand
Enter in heating furnace after being reheated to 195-210 DEG C, heat preservation 240-300 minutes, is furnace-cooled to temperature lower than 120 DEG C, comes out of the stove
It is air-cooled to room temperature.
Another technical solution of the present invention is, using the above method be prepared containing the more of nanocrystalline austenite
First low-alloy wear-resistant steel.
The beneficial effects of the present invention are:
1, the expensive alloy elements such as multi-element low alloy wear resistant cast steel of the present invention is nickeliferous, molybdenum, copper, lower production costs；
2, after polynary microalloy combined processing, solidified structure obviously refines multi-element low alloy wear resistant cast steel of the present invention, warp
After further superhigh temperature, high temperature and high temperature alternating temperature quenching treatment, the complex phase group of martensite plus nano crystalline substance austenite can be obtained
It knits；
3, multi-element low alloy wear resistant cast steel of the present invention has the characteristics that hardness is high, wearability is good and obdurability is good, wherein resisting
Tensile strength reaches 2190-2240Mpa, and hardness is greater than 52HRC, impact flexibility akuGreater than 120J/cm2, elongation percentage be greater than 35%, and
Material of the present invention has good drawing hardening effect, for producingBall grinding machine lining board is used for grinding iron ore
Hardness improves 4-6HRC afterwards.
Detailed description of the invention
Fig. 1 is the metallographic microstructure of the multi-element low alloy wear resistant cast steel prepared by the present invention containing nanocrystalline austenite,
Middle figure a is macrostructure figure, and figure b is mirco structure figure；
Fig. 2 is the transmission electron microscope photo of the multi-element low alloy wear resistant cast steel prepared by the present invention containing nanocrystalline austenite.
Specific embodiment
The present invention is described in detail With reference to embodiment.
A kind of preparation method of the multi-element low alloy wear resistant cast steel containing nanocrystalline austenite of the present invention, specifically according to the following steps
Implement:
Step 1, use steel scrap, ferrosilicon, manganese iron and ferrochrome for raw material, the melting in electric furnace, by the chemical group of molten steel in furnace
At and its mass fraction control in 0.28-0.37%C, 0.54-0.71%Mn, 1.55-1.74%Si, 1.04-1.28%Cr, <
0.032%P, < 0.027%S, surplus Fe, the sum of above chemical composition mass fraction are 100%；Then by molten steel heating in furnace
It comes out of the stove to 1658-1674 DEG C, and by molten steel to ladle, the multicomponent alloy of particle size 3.5-6.3mm has been previously added in ladle
Particle.
Multi-nary alloy particles additional amount accounts for the 3.1-3.4% into steel quality score in ladle, multi-nary alloy particles
Chemical composition and its mass fraction are 5.57-6.22%Ce, 3.85-4.39%Ti, 2.83-3.17%N, 2.04-2.65%V,
1.68-1.87%Ta, 12.06-12.71%Ba, 5.14-5.68%Ca, 18.33-19.27%Al, 1.62-1.85%Mg, it is remaining
Si is measured, the sum of above chemical composition mass fraction is 100%.
Step 2, after the molten steel in ladle is skimmed, stood, when temperature is down to 1502-1527 DEG C, molten steel is poured into casting
Type unpacks after casting temperature is lower than 400 DEG C in casting mold and takes out casting, through polishing, sand removal, obtains multi-element low alloy wear resistant casting
Steel.
Step 3, it is heat-treated:
Multi-element low alloy wear resistant cast steel casting will be obtained through step 2 polishing, sand removal, with stove heating to 1050-1065 DEG C, protected
After 15-18 minutes warm, being furnace-cooled to temperature is 980-995 DEG C, and after heat preservation 25-30 minute, coming out of the stove into water temperature is 20-32 DEG C of pond
Interior carry out water cooling；After cast(ing) surface temperature reaches 550-630 DEG C, casting is taken out from pond, it is big to immediately enter in-furnace temperature
After being reheated to 900-915 DEG C, heat preservation 100-120 minutes in 500 DEG C of heating furnace, coming out of the stove into water temperature is 25-35 DEG C
Water cooling is carried out in pond；When cast(ing) surface temperature is 190-210 DEG C, casting is taken out from pond, immediately enters in heating furnace weight
After being newly heated to 195-210 DEG C, heat preservation 240-300 minutes, temperature is furnace-cooled to lower than 120 DEG C, comes out of the stove and is air-cooled to room temperature, can obtain
The multi-element low alloy wear resistant cast steel of nanocrystalline austenite must be contained.
A kind of multi-element low alloy wear resistant cast steel containing nanocrystalline austenite of the present invention, high-efficient using electro-smelting, operation
It is easy.During smelting molten steel, using cheap steel scrap, ferrosilicon, manganese iron and ferrochrome as primary raw material, wherein 0.54- is added
0.71%Mn, 1.55-1.74%Si, 1.04-1.28%Cr are to be solid-solution in matrix using silicon, manganese, chromium, and it is solid that matrix can be improved
Molten reinforcing ability, convenient for obtaining martensitic structure after water hardening.In order to obtain the good lath martensite tissue of obdurability, by steel
Carbon content control in water is in 0.28-0.37%C.In addition, in order to improve cast steel toughness, stringent phosphorus restriction, the content of sulphur, wherein
P < 0.032%, S < 0.027%.Then by molten steel heating in furnace to 1658-1674 DEG C, having in molten steel can be further reduced
Evil gas and field trash.In addition, being previously added the polynary of particle size 3.5-6.3mm in ladle before molten steel enters ladle
Alloying pellet, multi-nary alloy particles additional amount account for the 3.1-3.4% into steel quality score in ladle, multi-nary alloy particles
Chemical composition and its mass fraction are 5.57-6.22%Ce, 3.85-4.39%Ti, 2.83-3.17%N, 2.04-2.65%V,
1.68-1.87%Ta, 12.06-12.71%Ba, 5.14-5.68%Ca, 18.33-19.27%Al, 1.62-1.85%Mg, it is remaining
Si is measured, the sum of above chemical composition mass fraction is 100%.Above-mentioned multi-nary alloy particles are added, can obviously refine solidification group
It knits, help to obtain as cast condition fine grained texture, obtain nanocrystalline austenite after promoting heat treatment.Molten steel in ladle is skimmed, is quiet
It postpones, when temperature is down to 1502-1527 DEG C, molten steel is poured into casting mold, after casting temperature is lower than 400 DEG C in casting mold, unpack
Casting is taken out, after polishing, sand removal, is heat-treated.
On this basis, by the casting after polishing, sand removal, with stove heating to 1050-1065 DEG C, 15-18 points of heat preservation
Zhong Hou realizes the raising of high temperature austenite stability.After being furnace-cooled to 980-995 DEG C of temperature, heat preservation 25-30 minutes, come out of the stove into water
Temperature is taken out casting from pond, is obtained to carry out water cooling in 20-32 DEG C of pond after cast(ing) surface temperature reaches 550-630 DEG C
Obtain the heterogeneous structure that martensite adds retained austenite；In order to refine austenite structure, the present invention needs to reach cast(ing) surface temperature
To after 550-630 DEG C, casting is taken out from pond, and is immediately entered and reheated in heating furnace of the in-furnace temperature greater than 500 DEG C
To 900-915 DEG C, after heat preservation 100-120 minutes, comes out of the stove into water temperature to carry out water cooling in 25-35 DEG C of pond, obtain martensite
The heterogeneous structure of plus nano crystalline substance austenite, so as to keep Multi-element low alloy cast steel high rigidity and superior abrasion resistance premise
Under, there is good obdurability and higher anti-fatigue performance.In addition, when cast(ing) surface temperature is 190-210 DEG C, from pond
Casting is taken out, immediately enters and is reheated to 195-210 DEG C in heating furnace, carries out tempering, it can be with stabilizing tissue, in elimination
Stress further increases the comprehensive performance of multi-element low alloy wear resistant cast steel.After heat preservation 240-300 minutes, it is low to be furnace-cooled to temperature
It in 120 DEG C, comes out of the stove and is air-cooled to room temperature, can be obtained the multi-element low alloy containing nanocrystalline austenite with excellent comprehensive performance
Abrasion resistant cast steel.
The present invention is further described with reference to embodiments, but the present invention is not limited to following embodiments.
Embodiment 1:
A kind of preparation method of the multi-element low alloy wear resistant cast steel containing nanocrystalline austenite, using 500 kilograms of Medium frequency inductions
Electro-smelting, specific process step are:
1. use steel scrap, ferrosilicon, manganese iron and ferrochrome for raw material, first the carbon and low-alloy abrasion resistant cast steel in melting in electric furnace, and
The chemical composition of molten steel in furnace and its mass fraction are controlled in 0.28%C, 0.71%Mn, 1.55%Si, 1.28%Cr,
0.030%P, 0.021%S, surplus Fe, the sum of above chemical composition mass fraction are 100%, then extremely by molten steel heating in furnace
1658 DEG C, and molten steel is come out of the stove to ladle, the multi-nary alloy particles of particle size 3.5-6.3mm have been previously added in ladle, it is more
First alloying pellet additional amount accounts for 3.1% into steel quality score in ladle, the chemical composition and its matter of multi-nary alloy particles
Measuring score is 5.57%Ce, 4.39%Ti, 2.83%N, 2.65%V, 1.68%Ta, 12.71%Ba, 5.14%Ca, 19.27%
Al, 1.62%Mg, surplus Si, the sum of above chemical composition mass fraction are 100%；After molten steel in ladle is skimmed, is stood,
When temperature is down to 1502 DEG C, molten steel is poured into casting mold, after casting temperature is lower than 400 DEG C in casting mold, unpacks and takes out casting, warp
After polishing, sand removal, it is ready for being heat-treated；
2. by step 1. in through polishing, the casting after sand removal, with stove heating to 1065 DEG C, after heat preservation 15 minutes, be furnace-cooled to
After 995 DEG C of temperature, heat preservation 25 minutes, come out of the stove into water temperature to carry out water cooling in 29-32 DEG C of pond, when cast(ing) surface temperature reaches
After 595-630 DEG C, casting is taken out from pond, is immediately entered in 556-564 DEG C of in-furnace temperature of heating furnace and is reheated to 915
DEG C, after heat preservation 100 minutes, come out of the stove into water temperature to carry out water cooling in 34-35 DEG C of pond, when cast(ing) surface temperature is 205-210
DEG C, casting is taken out from pond, is immediately entered after being reheated to 210 DEG C, heat preservation 240 minutes in heating furnace, is furnace-cooled to temperature
It lower than 120 DEG C, comes out of the stove and is air-cooled to room temperature, can be obtained the multi-element low alloy wear resistant cast steel containing nanocrystalline austenite, mechanical property
1 can be shown in Table.
Embodiment 2:
A kind of preparation method of the multi-element low alloy wear resistant cast steel containing nanocrystalline austenite, using 1500 kilograms of Medium frequency inductions
Electro-smelting, specific process step are:
1. use steel scrap, ferrosilicon, manganese iron and ferrochrome for raw material, first the carbon and low-alloy abrasion resistant cast steel in melting in electric furnace, and
The chemical composition of molten steel in furnace and its mass fraction are controlled in 0.37%C, 0.54%Mn, 1.74%Si, 1.04%Cr,
0.025%P, 0.020%S, surplus Fe, the sum of above chemical composition mass fraction are 100%, then extremely by molten steel heating in furnace
1674 DEG C, and molten steel is come out of the stove to ladle, the multi-nary alloy particles of particle size 3.5-6.3mm have been previously added in ladle, it is more
First alloying pellet additional amount accounts for 3.4% into steel quality score in ladle, the chemical composition and its matter of multi-nary alloy particles
Measuring score is 6.22%Ce, 3.85%Ti, 3.17%N, 2.04%V, 1.87%Ta, 12.06%Ba, 5.68%Ca, 18.33%
Al, 1.85%Mg, surplus Si, the sum of above chemical composition mass fraction are 100%；After molten steel in ladle is skimmed, is stood,
When temperature is down to 1527 DEG C, molten steel is poured into casting mold, after casting temperature is lower than 400 DEG C in casting mold, unpacks and takes out casting, warp
After polishing, sand removal, it is ready for being heat-treated；
2. by step 1. in through polishing, the casting after sand removal, with stove heating to 1050 DEG C, after heat preservation 18 minutes, be furnace-cooled to
Temperature is 980 DEG C, and after heat preservation 30 minutes, coming out of the stove into water temperature is progress water cooling in 20-24 DEG C of pond；When cast(ing) surface temperature reaches
To after 550-590 DEG C, casting is taken out from pond, is immediately entered and is reheated in 522-527 DEG C of in-furnace temperature of heating furnace
After 900 DEG C, heat preservation 120 minutes, coming out of the stove into water temperature is progress water cooling in 25-28 DEG C of pond；When cast(ing) surface temperature is 195-
203 DEG C, casting is taken out from pond, is immediately entered after being reheated to 205 DEG C, heat preservation 300 minutes in heating furnace, is furnace-cooled to temperature
Degree is lower than 120 DEG C, comes out of the stove and is air-cooled to room temperature, can be obtained the multi-element low alloy wear resistant cast steel containing nanocrystalline austenite, mechanics
Performance is shown in Table 1.
Embodiment 3:
A kind of multi-element low alloy wear resistant cast steel and preparation method thereof containing nanocrystalline austenite, using 1000 kilograms of intermediate frequency senses
Electro-smelting is answered, specific process step is:
1. use steel scrap, ferrosilicon, manganese iron and ferrochrome for raw material, first the carbon and low-alloy abrasion resistant cast steel in melting in electric furnace, and
The chemical composition of molten steel in furnace and its mass fraction are controlled in 0.33%C, 0.59%Mn, 1.63%Si, 1.19%Cr,
0.029%P, 0.025%S, surplus Fe, the sum of above chemical composition mass fraction are 100%, then extremely by molten steel heating in furnace
1666 DEG C, and molten steel is come out of the stove to ladle, the multi-nary alloy particles of particle size 3.5-6.3mm have been previously added in ladle, it is more
First alloying pellet additional amount accounts for 3.2% into steel quality score in ladle, the chemical composition and its matter of multi-nary alloy particles
Measuring score is 5.93%Ce, 4.18%Ti, 2.96%N, 2.51%V, 1.80%Ta, 12.57%Ba, 5.42%Ca, 18.71%
Al, 1.76%Mg, surplus Si, the sum of above chemical composition mass fraction are 100%；After molten steel in ladle is skimmed, is stood,
When temperature is down to 1516 DEG C, molten steel is poured into casting mold, after casting temperature is lower than 400 DEG C in casting mold, unpacks and takes out casting, warp
After polishing, sand removal, it is ready for being heat-treated；
2. by step 1. in through polishing, the casting after sand removal, with stove heating to 1060 DEG C, after heat preservation 16 minutes, be furnace-cooled to
Temperature is 990 DEG C, and after heat preservation 28 minutes, coming out of the stove into water temperature is progress water cooling in 25-28 DEG C of pond；When cast(ing) surface temperature reaches
To after 575-592 DEG C, casting is taken out from pond, is immediately entered and is reheated in 538-549 DEG C of in-furnace temperature of heating furnace
After 910 DEG C, heat preservation 110 minutes, coming out of the stove into water temperature is progress water cooling in 29-31 DEG C of pond；When cast(ing) surface temperature is 190-
195 DEG C, casting is taken out from pond, is immediately entered after being reheated to 195 DEG C, heat preservation 280 minutes in heating furnace, is furnace-cooled to temperature
Degree is lower than 120 DEG C, comes out of the stove and is air-cooled to room temperature, can be obtained the multi-element low alloy wear resistant cast steel containing nanocrystalline austenite, mechanics
Performance is shown in Table 1.
Embodiment 4:
A kind of multi-element low alloy wear resistant cast steel and preparation method thereof containing nanocrystalline austenite, using 500 kilograms of intermediate frequency senses
Electro-smelting is answered, specific process step is:
1. use steel scrap, ferrosilicon, manganese iron and ferrochrome for raw material, first the carbon and low-alloy abrasion resistant cast steel in melting in electric furnace, and
The chemical composition of molten steel in furnace and its mass fraction are controlled in 0.30%C, 0.56%Mn, 1.60%Si, 1.10%Cr,
0.031%P, 0.022%S, surplus Fe, the sum of above chemical composition mass fraction are 100%, then extremely by molten steel heating in furnace
1660 DEG C, and molten steel is come out of the stove to ladle, the multi-nary alloy particles of particle size 3.5-6.3mm have been previously added in ladle, it is more
First alloying pellet additional amount accounts for 3.3% into steel quality score in ladle, the chemical composition and its matter of multi-nary alloy particles
Measuring score is 5.72%Ce, 3.96%Ti, 2.90%N, 2.17%V, 1.73%Ta, 12.26%Ba, 5.29%Ca, 18.54%
Al, 1.70%Mg, surplus Si, the sum of above chemical composition mass fraction are 100%；After molten steel in ladle is skimmed, is stood,
When temperature is down to 1510 DEG C, molten steel is poured into casting mold, after casting temperature is lower than 400 DEG C in casting mold, unpacks and takes out casting, warp
After polishing, sand removal, it is ready for being heat-treated；
2. by step 1. in through polishing, the casting after sand removal, with stove heating to 1055 DEG C, after heat preservation 17 minutes, be furnace-cooled to
Temperature is 985 DEG C, and after heat preservation 29 minutes, coming out of the stove into water temperature is progress water cooling in 22-25 DEG C of pond；When cast(ing) surface temperature reaches
To after 567-579 DEG C, casting is taken out from pond, is immediately entered and is reheated in 525-537 DEG C of in-furnace temperature of heating furnace
After 905 DEG C, heat preservation 117 minutes, coming out of the stove into water temperature is progress water cooling in 27-29 DEG C of pond；When cast(ing) surface temperature is 191-
199 DEG C, casting is taken out from pond, is immediately entered after being reheated to 200 DEG C, heat preservation 290 minutes in heating furnace, is furnace-cooled to temperature
Degree is lower than 120 DEG C, comes out of the stove and is air-cooled to room temperature, can be obtained the multi-element low alloy wear resistant cast steel containing nanocrystalline austenite, mechanics
Performance is shown in Table 1.
Embodiment 5:
A kind of multi-element low alloy wear resistant cast steel and preparation method thereof containing nanocrystalline austenite, using 1500 kilograms of intermediate frequency senses
Electro-smelting is answered, specific process step is:
1. use steel scrap, ferrosilicon, manganese iron and ferrochrome for raw material, first the carbon and low-alloy abrasion resistant cast steel in melting in electric furnace, and
The chemical composition of molten steel in furnace and its mass fraction are controlled in 0.35%C, 0.65%Mn, 1.70%Si, 1.25%Cr,
0.027%P, 0.024%S, surplus Fe, the sum of above chemical composition mass fraction are 100%, then extremely by molten steel heating in furnace
1670 DEG C, and molten steel is come out of the stove to ladle, the multi-nary alloy particles of particle size 3.5-6.3mm have been previously added in ladle, it is more
First alloying pellet additional amount accounts for 3.25% into steel quality score in ladle, the chemical composition and its matter of multi-nary alloy particles
Measuring score is 6.05%Ce, 4.23%Ti, 3.08%N, 2.35%V, 1.85%Ta, 12.38%Ba, 5.50%Ca, 18.93%
Al, 1.81%Mg, surplus Si, the sum of above chemical composition mass fraction are 100%；After molten steel in ladle is skimmed, is stood,
When temperature is down to 1520 DEG C, molten steel is poured into casting mold, after casting temperature is lower than 400 DEG C in casting mold, unpacks and takes out casting, warp
After polishing, sand removal, it is ready for being heat-treated；
2. by step 1. in through polishing, the casting after sand removal, with stove heating to 1062 DEG C, after heat preservation 15 minutes, be furnace-cooled to
Temperature is 992 DEG C, and after heat preservation 24 minutes, coming out of the stove into water temperature is progress water cooling in 29-31 DEG C of pond；When cast(ing) surface temperature reaches
To after 605-625 DEG C, casting is taken out from pond, is immediately entered and is reheated in 545-555 DEG C of in-furnace temperature of heating furnace
After 912 DEG C, heat preservation 105 minutes, coming out of the stove into water temperature is progress water cooling in 30-32 DEG C of pond；When cast(ing) surface temperature is 198-
206 DEG C, casting is taken out from pond, is immediately entered after being reheated to 207 DEG C, heat preservation 250 minutes in heating furnace, is furnace-cooled to temperature
Degree is lower than 120 DEG C, comes out of the stove and is air-cooled to room temperature, can be obtained the multi-element low alloy wear resistant cast steel containing nanocrystalline austenite, mechanics
Performance is shown in Table 1.
The mechanical property of multi-element low alloy wear resistant cast steel of the table 1 containing nanocrystalline austenite
As can be seen from the above table, multi-element low alloy wear resistant cast steel tensile strength prepared by the present invention can reach 2190-
2240Mpa, hardness are greater than 52HRC, impact flexibility akuGreater than 120J/cm2, elongation percentage is greater than 35%, plasticity and toughness relative to
Existing low-alloy wear-resistant steel, which has, to be obviously improved.
Fig. 1 be multi-element low alloy wear resistant cast steel prepared by the present invention metallographic microstructure (figure a be macrostructure, figure b be
Mirco structure), as can be seen from the figure the Main Tissues of steel ingot are lath martensites.
Fig. 2 is the transmission electron microscope photo of multi-element low alloy wear resistant cast steel prepared by the present invention, as can be seen from the figure in horse
It is inlaid with nanometer austenite (shown in arrow) between family name's body, illustrates that the method for the present invention successfully obtains nanometer in martensitic structure
Brilliant austenite.The presence of nanocrystalline austenite is conducive to the toughness for improving cast steel, in addition, nanocrystalline austenite in wear process
Under abrasion load effect, easily it is transformed into the martensite of high rigidity, may advantageously facilitate further increasing for cast steel wearability.
The expensive alloy elements such as multi-element low alloy wear resistant cast steel of the present invention is nickeliferous, molybdenum, copper have lower be produced into
This.After polynary microalloy combined processing, solidified structure obviously refines multi-element low alloy wear resistant cast steel of the present invention, is further surpassed
After high temperature, high temperature and high temperature alternating temperature quenching treatment, the heterogeneous structure of martensite plus nano crystalline substance austenite can be obtained.The present invention
Multi-element low alloy wear resistant cast steel has the characteristics that hardness is high, wearability is good and obdurability is good, and wherein tensile strength reaches 2190-
2240Mpa, hardness are greater than 52HRC, impact flexibility akuGreater than 120J/cm2, greater than 35%, material of the present invention also has elongation percentage
Good drawing hardening effect, for producingBall grinding machine lining board improves 4- for grinding iron ore, using rear hardness
6HRC, material of the present invention are used for ball grinding machine lining board, grinder hammerhead and crushing wall, and service life improves 350- than potassium steel
400%, occur in use without fracture, metaboly, promoting and applying has good economic and social benefit.
Claims (10)
1. a kind of preparation method of the multi-element low alloy wear resistant cast steel containing nanocrystalline austenite, which is characterized in that use steel scrap, silicon
Iron, manganese iron and ferrochrome are raw material, and melting medium carbon low alloy steel carries out polynary microalloy combined processing in fusion process, is poured
To multi-element low alloy wear resistant cast steel；Then it is carried out superhigh temperature, high temperature, high temperature alternating temperature quenching treatment to get to contain receive
The multi-element low alloy wear resistant cast steel of the brilliant austenite of rice.
2. a kind of preparation method of multi-element low alloy wear resistant cast steel containing nanocrystalline austenite according to claim 1,
It is characterized in that, is specifically implemented according to the following steps:
Step 1, use steel scrap, ferrosilicon, manganese iron and ferrochrome for raw material, the melting medium carbon low alloy steel in electric furnace, then by melting
Obtained molten steel is come out of the stove to ladle, has been previously added multi-nary alloy particles in ladle；
Step 2, after the molten steel in ladle is skimmed, stood, molten steel is poured into casting mold, when casting temperature is lower than in casting mold by cooling
After 400 DEG C, casting is taken out, through polishing, sand removal, obtains multi-element low alloy wear resistant cast steel casting；
Step 3, the alternating temperature of superhigh temperature, high temperature, high temperature is successively carried out to the multi-element low alloy wear resistant cast steel casting that step 2 obtains
It is quenched to get the multi-element low alloy wear resistant cast steel containing nanocrystalline austenite is arrived.
3. a kind of preparation method of multi-element low alloy wear resistant cast steel containing nanocrystalline austenite according to claim 2,
It is characterized in that, the chemical composition of molten steel and its mass fraction are controlled in 0.28-0.37%C, 0.54- in electric furnace in the step 1
0.71%Mn, 1.55-1.74%Si, 1.04-1.28%Cr, < 0.032%P, < 0.027%S, surplus Fe, the above chemical group
It is 100% at the sum of mass fraction.
4. a kind of preparation method of multi-element low alloy wear resistant cast steel containing nanocrystalline austenite according to claim 2,
It is characterized in that, by molten steel heating to 1658-1674 DEG C before molten steel is come out of the stove to ladle in the step 1.
5. a kind of preparation method of multi-element low alloy wear resistant cast steel containing nanocrystalline austenite according to claim 2,
It is characterized in that, the size of multi-nary alloy particles is 3.5-6.3mm in the step 1.
6. a kind of preparation method of multi-element low alloy wear resistant cast steel containing nanocrystalline austenite according to claim 2 or 5,
It is characterized in that, multi-nary alloy particles additional amount accounts for the 3.1-3.4% into steel quality score in ladle in the step 1,
The chemical composition and its mass fraction of multi-nary alloy particles are 5.57-6.22%Ce, 3.85-4.39%Ti, 2.83-3.17%N,
2.04-2.65%V, 1.68-1.87%Ta, 12.06-12.71%Ba, 5.14-5.68%Ca, 18.33-19.27%Al,
1.62-1.85%Mg, surplus Si, the sum of above chemical composition mass fraction are 100%.
7. a kind of preparation method of multi-element low alloy wear resistant cast steel containing nanocrystalline austenite according to claim 2,
It is characterized in that, in the step 2 when liquid steel temperature is down to 1502-1527 DEG C, molten steel is poured into casting mold.
8. a kind of preparation method of multi-element low alloy wear resistant cast steel containing nanocrystalline austenite according to claim 1 or 2,
It is characterized in that, hyperthermic temperature is 1050-1065 DEG C in the step 3, high-temperature temperature is 900-915 DEG C, high temperature temperature
It is 195-210 DEG C.
9. a kind of preparation method of multi-element low alloy wear resistant cast steel containing nanocrystalline austenite according to claim 1 or 2,
It is characterized in that, alternating temperature is quenched in the step 3, specifically: multi-element low alloy wear resistant cast steel casting will be obtained through step 2
Part, with stove heating to 1050-1065 DEG C, after heat preservation 15-18 minutes, being furnace-cooled to temperature is 980-995 DEG C, keeps the temperature 25-30 minutes
Afterwards, coming out of the stove into water temperature is progress water cooling in 20-32 DEG C of pond；After cast(ing) surface temperature reaches 550-630 DEG C, from pond
Casting is taken out, immediately enters and is reheated to 900-915 DEG C, 100-120 points of heat preservation in heating furnace of the in-furnace temperature greater than 500 DEG C
Zhong Hou, coming out of the stove into water temperature is progress water cooling in 25-35 DEG C of pond；When cast(ing) surface temperature be 190-210 DEG C, taken from pond
Casting out immediately enters after being reheated to 195-210 DEG C, heat preservation 240-300 minutes in heating furnace, is furnace-cooled to temperature and is lower than
It 120 DEG C, comes out of the stove and is air-cooled to room temperature.
10. the multi-element low alloy wear resistant cast steel containing nanocrystalline austenite that any one of -9 the methods obtain according to claim 1.
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN110319050A (en) * | 2019-06-20 | 2019-10-11 | 芜湖奇点新能源科技有限公司 | Shaft for compressor and the compressor with it, automobile |
| CN111545748A (en) * | 2020-04-14 | 2020-08-18 | 西安工程大学 | Composite manufacturing method of rolling mill housing |
| CN111545748B (en) * | 2020-04-14 | 2022-08-30 | 西安工程大学 | Composite manufacturing method of rolling mill housing |
| CN111621825A (en) * | 2020-04-17 | 2020-09-04 | 安徽澳新工具有限公司 | Surface treatment method for hard alloy steel hammer with strong wear resistance |
| CN115287552A (en) * | 2022-08-17 | 2022-11-04 | 四川清贝科技技术开发有限公司 | Lightweight low-alloy steel casting, preparation method and application thereof |
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| CN109440001B (en) | 2020-12-01 |
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