CN110408844A - A kind of wood cutter mould steel and its manufacturing method - Google Patents

A kind of wood cutter mould steel and its manufacturing method Download PDF

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Publication number
CN110408844A
CN110408844A CN201910777789.4A CN201910777789A CN110408844A CN 110408844 A CN110408844 A CN 110408844A CN 201910777789 A CN201910777789 A CN 201910777789A CN 110408844 A CN110408844 A CN 110408844A
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China
Prior art keywords
steel
ingot
band steel
band
furnace
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CN201910777789.4A
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Chinese (zh)
Inventor
李栋
陈考
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Heye Sci & Tech Co Ltd
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Heye Sci & Tech Co Ltd
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    • C—CHEMISTRY; METALLURGY
    • C21—METALLURGY OF IRON
    • C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
    • C21D1/00—General methods or devices for heat treatment, e.g. annealing, hardening, quenching or tempering
    • C21D1/18—Hardening; Quenching with or without subsequent tempering
    • C—CHEMISTRY; METALLURGY
    • C21—METALLURGY OF IRON
    • C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
    • C21D1/00—General methods or devices for heat treatment, e.g. annealing, hardening, quenching or tempering
    • C21D1/26—Methods of annealing
    • C—CHEMISTRY; METALLURGY
    • C21—METALLURGY OF IRON
    • C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
    • C21D1/00—General methods or devices for heat treatment, e.g. annealing, hardening, quenching or tempering
    • C21D1/26—Methods of annealing
    • C21D1/32—Soft annealing, e.g. spheroidising
    • C—CHEMISTRY; METALLURGY
    • C21—METALLURGY OF IRON
    • C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
    • C21D6/00—Heat treatment of ferrous alloys
    • C21D6/002—Heat treatment of ferrous alloys containing Cr
    • C—CHEMISTRY; METALLURGY
    • C21—METALLURGY OF IRON
    • C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
    • C21D6/00—Heat treatment of ferrous alloys
    • C21D6/005—Heat treatment of ferrous alloys containing Mn
    • C—CHEMISTRY; METALLURGY
    • C21—METALLURGY OF IRON
    • C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
    • C21D6/00—Heat treatment of ferrous alloys
    • C21D6/008—Heat treatment of ferrous alloys containing Si
    • C—CHEMISTRY; METALLURGY
    • C21—METALLURGY OF IRON
    • C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
    • C21D8/00—Modifying the physical properties by deformation combined with, or followed by, heat treatment
    • C21D8/005—Modifying the physical properties by deformation combined with, or followed by, heat treatment of ferrous alloys
    • C—CHEMISTRY; METALLURGY
    • C21—METALLURGY OF IRON
    • C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
    • C21D9/00—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor
    • C21D9/52—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor for wires; for strips ; for rods of unlimited length
    • 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
    • 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
    • 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
    • C22C38/02—Ferrous alloys, e.g. steel alloys containing silicon
    • 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
    • C22C38/04—Ferrous alloys, e.g. steel alloys containing manganese
    • 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
    • C22C38/22—Ferrous alloys, e.g. steel alloys containing chromium with molybdenum or tungsten
    • 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
    • C22C38/24—Ferrous alloys, e.g. steel alloys containing chromium with vanadium

Abstract

The invention discloses a kind of wood cutter mould steel, its chemical constituent includes: 0.50-0.59%C, 80-0.95%Si, 0.35-0.55%Mn, at most 0.030%P, at most 0.010%S, 8.30-9.00%Cr, 1.55-1.90%Mo, 1.00-2.50%W, 0.30-0.40%V by mass percentage, and surplus is iron；Steel ingot is forged to square billet using first preparing to steel ingot by preparation method, is round steel by billet rolling, is band steel by round rolling, carries out specific annealing process to band steel.The present invention improves the toughness, wearability and service life of steel by the improvement to ingredient and manufacture, and steel easily obtain fine grained texture after quenching.

Description

A kind of wood cutter mould steel and its manufacturing method
Technical field
The invention belongs to grinding tool steel making technical field, specifically a kind of wood cutter mould steel and its manufacturing method.
Background technique
Forestry rotary tableting machine peeling knife disk rotating speed is up to hundreds of and thousands of turns per minute, and lumber fibre tissue is tough and tensile and uneven It is even, elastic recovery is big, poor thermal conductivity, round log is without fixation when adding rotary-cut, and acutely, the operating condition of cutting blade is extremely disliked for bounce It is bad.Its failure mode is abrasion and initial failure, wherein common to wear.
When blade work, cutting edge portion and wood tissue high speed contact are squeezed, and strong friction generates high fever, cross back blade Fire, the organic matter in timber also take this opportunity to form organo-metallic compound in conjunction with alloying element, therefore abrasion is mechanical, overheat and changes Coefficient synthesis result.
Blade after being worn out, increase sharply by cutting force and cutting temperature, so that machine vibration is aggravated or even is unable to run, initial failure is Tipping shortly occurs after installation for blade, turned, surface is peeled off, or even is broken and leads to major accident.It can be seen that rotary-cut Blade steel need to have suitable hardness to guarantee that sharp wear-resisting, the good tough cooperation of cutting edge ensures the shock resistance of cutter hub, with And certain resistance to tempering and corrosion resistance.That China is currently mainly used is 5Cr8MoVSi, there is the service life in use Low problem.
Foreign countries use ASTMA681 Plays grade of steel A8, as follows by mass fraction: 0.50-0.60%C, 0.20-0.50% Mn ,≤0.030%P ,≤0.030%S, 0.75-1.10%Si, 4.75-5.50%Cr, 1.00-1.50%W, 1.15-1.65% Mo。
The country uses 5Cr8MoVSi, as follows by mass fraction: 0.48-0.53%C, 0.75-1.05%Si, 0.35- 0.50%Mn ,≤0.030%P ,≤0.015%S, 0.35-0.50%Mn, 8.00-9.00%Cr, 1.25-1.70%Mo, 0.30-0.55%V.
The two is easily worn in the application of practical wood cutter, and the service life is low, and is quenched grain size and be difficult to refine.
Summary of the invention
To solve wood cutter service life easy to wear low disadvantage in use, the present invention provides a kind of wood cutter and uses Mould steel has excellent wearability, toughness and machinability, fine grained texture is easily obtained after quenching.
A kind of wood cutter mould steel, chemical constituent include: 0.50-0.59%C, 80- by mass percentage 0.95%Si, 0.35-0.55%Mn, at most 0.030%P, at most 0.010%S, 8.30-9.00%Cr, 1.55-1.90%Mo, 1.00-2.50%W, 0.30-0.40%V, surplus are iron.
The present invention also proposes a kind of manufacturing method of wood cutter mould steel, to prepare above-mentioned material of wood cutting tools.
(1) it prepared by steel ingot, preparing steel ingot has following two scheme:
Scheme one: alloy and return material fusing are poured by ladle using neutral crucible, through LF external refining, VD furnace vacuum is de- Gas is cast for R120 electrode bar, then through electric slag refusion and smelting or continuous coo1ing stripping formula electric slag refusion and smelting is 315 ESR ingot of φ；
Scheme two: alloy and return material fusing are poured by ladle using neutral crucible, through ESF external refining, injection forming Direct precipitation is steel ingot；
(2) anneal to the steel ingot after preparation, heated after through annular furnace, heating temperature more than recrystallization temperature, Heating temperature is set as 1090 DEG C；
(3) steel ingot after the heating, is forged to 140 sides by precise forging machine, square billet is after 760 DEG C of residual heat annealings through 600 milling train of φ Rolling is φ 65-72 round steel；
(4) band steel that φ 65-72 round steel is 5.5 × 80 × L through 430 mill milling of φ carries out specific nodularization to band steel Annealing process.
Further, the annealing process includes the following steps:
1) band steel is put into heating furnace, is warming up to 780 DEG C with the rate of 90-100 DEG C/h, keeps the temperature 6-8h；
2) band steel is warming up to 880-890 DEG C with the rate of 90-100 DEG C/h, keeps the temperature 5.5-7h；
It 3) will be with the rate fast cooling of >=50 DEG C/h to 800 DEG C by the band steel；
4) band steel is delayed from 800 DEG C and drops to 680 DEG C, the time is 9-11 hours；
5) all thermovents are opened, 550 DEG C is as cold as with furnace and comes out of the stove.
Compared with the existing technology, the beneficial effects of the present invention are:
(1) fine grained texture is easily obtained after quenching.
(2) C content and Mo content are improved, after addition W element multiple is compound, the toughness and wearability of material are improved, and are made 15-20% is improved than current material with the service life.
Specific embodiment
The technical solution of the patent is explained in further detail With reference to embodiment.
Embodiment one
A kind of wood cutter mould steel, be characterized in that chemical constituent include: by mass percentage 0.50-0.59%C, 80-0.95%Si, 0.35-0.55%Mn, at most 0.030%P, at most 0.010%S, 8.30-9.00%Cr, 1.55-1.90% Mo, 1.00-2.50%W, 0.30-0.40%V, surplus are iron.
Preparation method includes the following steps:
(1) alloy and return material fusing are poured by ladle using neutral crucible, through LF external refining, VD furnace vacuum outgas is poured Note is R120 electrode bar, then through electric slag refusion and smelting or continuous coo1ing stripping formula electric slag refusion and smelting is 315 ESR ingot of φ；
(2) anneal to the steel ingot after preparation, heated after through annular furnace, heating temperature more than recrystallization temperature, Heating temperature is set as 1090 DEG C；
(3) steel ingot after the heating, is forged to 140 sides by precise forging machine, square billet is after 760 DEG C of residual heat annealings through 600 milling train of φ Rolling is φ 65-72 round steel；
(4) band steel that φ 65-72 round steel is 5.5 × 80 × L through 430 mill milling of φ carries out specific nodularization to band steel Annealing process.
The annealing process includes the following steps:
1) band steel is put into heating furnace, is warming up to 780 DEG C with the rate of 90-100 DEG C/h, keeps the temperature 6-8h；
2) band steel is warming up to 880-890 DEG C with the rate of 90-100 DEG C/h, keeps the temperature 5.5-7h；
It 3) will be with the rate fast cooling of >=50 DEG C/h to 800 DEG C by the band steel；
4) band steel is delayed from 800 DEG C and drops to 680 DEG C, the time is 9-11 hours；
5) all thermovents are opened, 550 DEG C is as cold as with furnace and comes out of the stove.
Flat product reaches 62HRC through 1020 DEG C of oil quenchings, 520 DEG C of tempering, temper number, and grain size reaches 11 grades, punching Hitting toughness is 32J.
Embodiment two
The present embodiment is related to a kind of wood cutter mould steel, includes the following components'mass percentage: 0.58%C, 0.90%Si, 0.40%Mn, 0.025%%P, 0.008%S, 8.50%Cr, 1.75%Mo, 2.30%W, 0.35%V, surplus For iron.
Preparation method includes the following steps:
(1) alloy and return material fusing are poured by ladle using neutral crucible, through ESF external refining, injection forming is directly It is deposited as steel ingot；
(2) anneal to the steel ingot after preparation, heated after through annular furnace, heating temperature more than recrystallization temperature, Heating temperature is set as 1090 DEG C；
(3) steel ingot after the heating, is forged to 140 sides by precise forging machine, square billet is after 760 DEG C of residual heat annealings through 600 milling train of φ Rolling is φ 65-72 round steel；
(4) band steel that φ 65-72 round steel is 5.5 × 80 × L through 430 mill milling of φ carries out specific nodularization to band steel Annealing process.
The annealing process includes the following steps:
1) band steel is put into heating furnace, is warming up to 780 DEG C with the rate of 90-100 DEG C/h, keeps the temperature 6-8h；
2) band steel is warming up to 880-890 DEG C with the rate of 90-100 DEG C/h, keeps the temperature 5.5-7h；
It 3) will be with the rate fast cooling of >=50 DEG C/h to 800 DEG C by the band steel；
4) band steel is delayed from 800 DEG C and drops to 680 DEG C, the time is 9-11 hours；
5) all thermovents are opened, 550 DEG C is as cold as with furnace and comes out of the stove.
Flat product reaches 62.5HRC through 1020 DEG C of oil quenchings, 520 DEG C of tempering, temper number, and grain size reaches 11 grades, Impact flexibility is 34J.
The compound design principle of W element multiple is added by improving C content Mo content in the present invention, comprehensively considers different elements The rule that carbide dissolves in austenite in quenching process refines the effect of crystal grain with it, is prepared using special process, makes its tool There are excellent wearability, toughness and machinability, fine grained texture is easily obtained after quenching.
The effect of C element, C element are one of components of carbide, and Partial Elements are solid-solution in matrix, and it is strong to improve matrix Degree, C element content are not higher than 0.59%, do not generate or generate less ledeburite organization, C member to guarantee molten steel in process of setting Element is not less than 0.50%, to guarantee to reach suitable hardness after being heat-treated.
The effect of W element, W element are middle carbide formers, form M with carbon6C carbide, carbide resistance Only crystal grain is grown up, and improves the high temperature hardness and wearability of steel, content of element W is not higher than 2.50%, to guarantee that molten steel is solidifying The ledeburite organization for generating MC bone shape less in the process, prevents later period hot-working to be difficult to be crushed, influences the plasticity of steel；W element is not Lower than 1.00%, to guarantee to form enough carbide, the wearability of steel is improved.
The effect of Mo element, Mo element are middle carbide formers, and Mo element is not higher than 1.9%, are prevented solidifying in molten steel Gu M is formed during2The ledeburite organization of C sector sheet, the tissue belong to metastable state, are not easily decomposed, and Mo element is not less than 1.55%, to guarantee that Mo element and carbon, iron form compound cementite, there is solution strengthening, improve the stabilization of carbide The intensity wearability of property and steel.
The effect of Cr element, Cr element guarantee to greatly reduce the concentration and austenite of carbon in pearlite not less than 8.30% The limit of solubility of middle carbon promotes the precipitation of carbide, improves the intensity and hardness of steel, slows down austenite decomposition rate, shows The harden ability for improving steel is write, Cr element is not higher than 9.00% to guarantee bulky grain M23C6The content of carbide is less than 12%, to protect The toughness for demonstrate,proving steel, prevents tipping in use process.
The effect of V element, V element are carbides, form high rigidity, high-strength in conjunction with C element in steel The MC carbide of degree is the decisive organizational factor of steel wearability, and the V element of dissolution can greatly reinforce the post-curing of steel, and The carbide VC of reservation can then greatly increase the wearability of steel, but high V element content reduces product to a certain extent again Machinability, also easily generate tipping in cutter use process；Therefore the present invention design V element content be 0.30~ 0.40%, the content of V element is not less than 0.30%, to guarantee to be formed sufficient amount of MC carbide, when the content of V is lower than When 0.30%, the quantity of MC carbide is accordingly reduced, and reduces the wearability of steel and cutting ability, the maximum level of V is not higher than 0.40%, to guarantee the machinability and anti-tipping blade ability of steel.
Si element reinforced ferrite enhances the post-curing ability of steel heat treatment, reduces the critical cooling rate of steel, improves The harden ability of steel, Si control of the present invention is in 0.80-0.95%.
It is cataclasm that Mn element is easy cutting, is conducive to the quality for improving finished surface, S is that non-metallic inclusion forms member Element controls appropriate Mn and S and forms MnS to improve the harm eliminated other elements such as S and Fe and form low melting point nonmetal inclusion, But MnS rolling direction extend be distributed, reduce the toughness of rolling direction, therefore the lower S content the better, the present invention claims S≤ 0.010%, Mn are controlled in 0.35-0.55%.
The preferred embodiment of the patent is described in detail above, but this patent is not limited to above-mentioned embodiment party Formula within the knowledge of one of ordinary skill in the art can also be under the premise of not departing from this patent objective Various changes can be made.

Claims (3)

1. a kind of wood cutter mould steel, which is characterized in that chemical constituent includes: 0.50-0.59% by mass percentage C, 80-0.95%Si, 0.35-0.55%Mn, at most 0.030%P, at most 0.010%S, 8.30-9.00%Cr, 1.55- 1.90%Mo, 1.00-2.50%W, 0.30-0.40%V, surplus are iron.
2. a kind of manufacturing method of wood cutter mould steel, preparation method includes the following steps:
(1) it prepared by steel ingot, preparing steel ingot has following two scheme:
Scheme one: alloy and return material fusing are poured by ladle using neutral crucible, through LF external refining, VD furnace vacuum outgas is poured Note is R120 electrode bar, then through electric slag refusion and smelting or continuous coo1ing stripping formula electric slag refusion and smelting is 315 ESR ingot of φ；
Scheme two: alloy and return material fusing are poured by ladle using neutral crucible, through ESF external refining, injection forming is directly It is deposited as steel ingot；
(2) it anneals to the steel ingot after preparation, is heated after through annular furnace, heating temperature is more than recrystallization temperature, heating Temperature setting is 1090 DEG C；
(3) steel ingot after the heating, is forged to 140 sides by precise forging machine, square billet is after 760 DEG C of residual heat annealings through 600 mill milling of φ For φ 65-72 round steel；
(4) band steel that φ 65-72 round steel is 5.5 × 80 × L through 430 mill milling of φ carries out specific spheroidizing to band steel Technique.
3. a kind of manufacturing method of wood cutter mould steel according to claim 2, which is characterized in that the nodularization is moved back Fire process includes the following steps:
1) band steel is put into heating furnace, is warming up to 780 DEG C with the rate of 90-100 DEG C/h, keeps the temperature 6-8h；
2) band steel is warming up to 880-890 DEG C with the rate of 90-100 DEG C/h, keeps the temperature 5.5-7h；
It 3) will be with the rate fast cooling of >=50 DEG C/h to 800 DEG C by the band steel；
4) band steel is delayed from 800 DEG C and drops to 680 DEG C, the time is 9-11 hours；
5) all thermovents are opened, 550 DEG C is as cold as with furnace and comes out of the stove.
CN201910777789.4A 2019-08-22 2019-08-22 A kind of wood cutter mould steel and its manufacturing method Withdrawn CN110408844A (en)

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Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN111850391A (en) * 2020-06-18 2020-10-30 河冶科技股份有限公司 High-speed steel for screw punch and preparation method thereof
CN112410684A (en) * 2020-10-14 2021-02-26 河冶科技股份有限公司 Die steel and preparation method thereof
CN112430781A (en) * 2020-10-14 2021-03-02 河冶科技股份有限公司 Alloy tool steel for thread rolling wheel and preparation method thereof
CN115652214A (en) * 2022-11-11 2023-01-31 中铁建华南建设(广州)高科技产业有限公司 Steel, preparation method thereof and hob ring

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN111850391A (en) * 2020-06-18 2020-10-30 河冶科技股份有限公司 High-speed steel for screw punch and preparation method thereof
CN111850391B (en) * 2020-06-18 2022-06-24 河冶科技股份有限公司 High-speed steel for screw punch and preparation method thereof
CN112410684A (en) * 2020-10-14 2021-02-26 河冶科技股份有限公司 Die steel and preparation method thereof
CN112430781A (en) * 2020-10-14 2021-03-02 河冶科技股份有限公司 Alloy tool steel for thread rolling wheel and preparation method thereof
CN115652214A (en) * 2022-11-11 2023-01-31 中铁建华南建设(广州)高科技产业有限公司 Steel, preparation method thereof and hob ring
CN115652214B (en) * 2022-11-11 2023-11-03 中铁建华南建设(广州)高科技产业有限公司 Steel and preparation method thereof, hob ring

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