CN106191635A - A kind of shear knife material preparation method - Google Patents
A kind of shear knife material preparation method Download PDFInfo
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- CN106191635A CN106191635A CN201610723811.3A CN201610723811A CN106191635A CN 106191635 A CN106191635 A CN 106191635A CN 201610723811 A CN201610723811 A CN 201610723811A CN 106191635 A CN106191635 A CN 106191635A
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- steel
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- rare earth
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- shear knife
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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
-
- 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
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/005—Ferrous alloys, e.g. steel alloys containing rare earths, i.e. Sc, Y, Lanthanides
-
- 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
- C22C38/12—Ferrous alloys, e.g. steel alloys containing tungsten, tantalum, molybdenum, vanadium, or niobium
-
- 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
- C22C38/14—Ferrous alloys, e.g. steel alloys containing titanium or zirconium
-
- 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
-
- 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
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P10/00—Technologies related to metal processing
- Y02P10/20—Recycling
Abstract
The invention discloses a kind of shear knife material preparation method, include following processing step: prepared by molten steel, raw material steel scrap part, ferrochrome, ferrotungsten, molybdenum-iron, ferro-niobium, rare earth silicon it is sequentially added in order in vacuum induction furnace melting, VN alloy is added after molten steel is melting down, then with aluminium wire, molten steel is carried out deoxidation alloying, then cast by investment casting；After casting, in as cast condition steel billet, the mass percent of each alloy element is: C0.75 1.05%, W2.5%, Mo2.0 3.0%, V1.5 3.0%, Cr4.0%, Nb0.05%, Re0.1%, Ti0.08 ~ 0.12%, and surplus is Fe；Reduce expensive W, Mo content in high-speed steel, add the element such as N, Nb and RE of trace, it is thus achieved that both kept the characteristic of higher red hardness simultaneously, reduce cost the most greatly, improve blade wearability.
Description
Technical field
The present invention relates to field of alloy material, particularly belong to a kind of shear knife material preparation method.
Background technology
At present, domestic and international shear knife material substantially has high carbon and chromium cast steel, and common high-speed steel and hard alloy etc. are several
Type.High carbon and chromium cast steel is owing to there being certain wearability, and low price, therefore it being widely used, high-carbon is high
The material that chromium blade steel is conventional has 13Cr13WMoV and 18Cr20WMoV.Owing to both steel hardness and wearability rely primarily on
Carbide Cr7C3 and Cr23C6 of chromium, heat stability is poor, typically starts agglomeration more than 450 DEG C and gradually softens.?
When 550 DEG C, hardness below HRC50 to be down to.And the temperature that shear knife is under high-speed cruising can reach about 550 DEG C, this
Blade is just made substantially to reduce service life.The post-curing temperature of high-speed steel is at about 550 DEG C, and hardness maintains HRC62 ~ 64,
The service life of blade can be significantly increased；Hard alloy also has good high temperature hardness and wearability.But due to common high speed
The manufacturing cost of steel and hard alloy is the highest, is restricted in the use of high line blade material.
Summary of the invention
It is an object of the invention to provide a kind of shear knife material preparation method, reduce in high-speed steel expensive
W, Mo content, the element such as N, Nb and RE of simultaneously adding trace, it is thus achieved that both kept the characteristic of higher red hardness, the most greatly
Reduce cost, improve blade wearability.
Technical scheme is as follows:
A kind of shear knife material preparation method, includes following processing step:
1), molten steel prepare, be sequentially added in vacuum induction furnace melting in order raw material steel scrap part, ferrochrome, ferrotungsten, molybdenum-iron,
Ferro-niobium, rare earth silicon, add VN alloy after molten steel is melting down, then with aluminium wire, molten steel carried out deoxidation alloying, then use fusible pattern
Casting is cast；
2), after casting, in as cast condition steel billet, the mass percent of each alloy element is: C0.75-1.05%, W2.5%, Mo2.0-
3.0%, V1.5-3.0%, Cr4.0%, Nb0.05%, Re0.1%, Ti0.08 ~ 0.12%, surplus be Fe, Re be rare earth silicon；
3), as cast condition steel billet through 800-850 DEG C annealing 1.8-2.2h after, quench, hardening heat is 1175-1250 DEG C, tempering
Temperature 400-560 DEG C, is tempered 3 times, is tempered 1 time every 2 hours；
4), then by the blade after tempering carrying out salt bath process, it is the hydrochloric acid solution of 28-32% that salt bath is processed as by mass concentration
In blade foundry goods is carried out salt bath, period carry out to hydrochloric acid solution sensing heating: room temperature～80 DEG C, the heating-up time be 0.6～
0.8h, is incubated 1-2h, is finally carried out with water.
In described as cast condition steel billet, the mass percent of each alloy element is: C0.75%, W2.5%, Mo2.0%, V1.5%,
Cr4.0%, Nb0.05%, Re0.1%, Ti0.08%, surplus be Fe, Re be rare earth silicon.
In described as cast condition steel billet, the mass percent of each alloy element is: C1.05%, W2.5%, Mo2.0%, V2.0%,
Cr4.0%, Nb0.05%, Re0.1%, Ti0.12%, surplus be Fe, Re be rare earth silicon.
Compared with prior art, the Advantageous Effects of the present invention is as follows:
1) reduce W, Mo element in high-speed steel, add the low-alloy high-speed steel of trace Nb, N, RE element simultaneously
The as-cast structure of W3Mo2Cr4V2NbNRE is by continuous net-shaped eutectic ledeburite, dark structure, martensite and retained austenite group
Become.Annealed, quench, be tempered after be organized as the most netted eutectic carbide, tempered martensite, proeutectoid carbide and remnants
Austenite.
2) Technology for Heating Processing of W3Mo2Cr4V2NbNRE is+560 DEG C of three tempering of 1250 DEG C of quenchings, and hardness reaches HRC64.
This steel belt roof bolt stability is also fine, and the hardness after 560 DEG C of insulation 20h is still HRC62.
3) although the tempered structure of quenching of casting low-alloy high speed steel W 3Mo2Cr4V2NbNRE there are eutectic carbide,
As long as but the blade that compressive stress state is born in manufacture is feasible.Wearability is far above existing cast steel with high chromium blade, close to
The wearability of common high-speed steel.
4) low than universal high speed steel W18Cr4V of the cost of W3Mo2Cr4V2NbNRE, is a kind of energy-saving wear-resisting material
Material.
Accompanying drawing explanation
Fig. 1 is as-cast metallographic structure's schematic diagram of test steel.
Fig. 2 is that each steel grade abrasive wear contrasts schematic diagram.
Fig. 3 is each steel grade skimming wear comparison diagram.
Detailed description of the invention
Embodiment 1:
A kind of shear knife material preparation method, includes following processing step:
1), molten steel prepare, be sequentially added in vacuum induction furnace melting in order raw material steel scrap part, ferrochrome, ferrotungsten, molybdenum-iron,
Ferro-niobium, rare earth silicon, add VN alloy after molten steel is melting down, then with aluminium wire, molten steel carried out deoxidation alloying, then use fusible pattern
Casting is cast；
2), after casting, the mass percent of each alloy element is in as cast condition steel billet: C0.75%, W2.5%, Mo2.0%,
V1.5%, Cr4.0%, Nb0.05%, Re0.1%, Ti0.08%, surplus be Fe, Re be rare earth silicon；
3), as cast condition steel billet through 800 DEG C annealing 1.8h after, quench, hardening heat is 1175 DEG C, temperature 450 DEG C, tempering
3 times, it was tempered 1 time every 2 hours；
4), then by the blade after tempering carrying out salt bath process, salt bath is processed as with right in the hydrochloric acid solution that mass concentration is 28%
Blade foundry goods carries out salt bath, and period carries out hydrochloric acid solution sensing heating: room temperature～80 DEG C, and the heating-up time is 0.6h, is incubated 1h,
Finally it is carried out with water.
Embodiment 2:
A kind of shear knife material preparation method, includes following processing step:
1), molten steel prepare, be sequentially added in vacuum induction furnace melting in order raw material steel scrap part, ferrochrome, ferrotungsten, molybdenum-iron,
Ferro-niobium, rare earth silicon, add VN alloy after molten steel is melting down, then with aluminium wire, molten steel carried out deoxidation alloying, then use fusible pattern
Casting is cast；
2), after casting, the mass percent of each alloy element is in as cast condition steel billet: C1.05%, W2.5%, Mo2.0%,
V2.0%, Cr4.0%, Nb0.05%, Re0.1%, Ti0.12%, surplus be Fe, Re be rare earth silicon；
3), as cast condition steel billet through 850 DEG C annealing 2.2h after, quench, hardening heat is 1250 DEG C, temperature 560 DEG C, tempering
3 times, it was tempered 1 time every 2 hours；
4), then by the blade after tempering carrying out salt bath process, salt bath is processed as with right in the hydrochloric acid solution that mass concentration is 32%
Blade foundry goods carries out salt bath, and period carries out hydrochloric acid solution sensing heating: room temperature～80 DEG C, and the heating-up time is 0.8h, is incubated 2h,
Finally it is carried out with water.
Steel after the as cast condition steel billet prepared by the present embodiment is carried out Q-tempering carries out red hardness test, at 550 DEG C
Insulation 4 hours totally five times 20 hours, survey its hardness with 69-1 type Michael Burawoy optics hardness tester after being cooled to room temperature every time every time；Mill
Grain wear test, sample is processed into 10 mm × 10 mm × 20mm, carries out no-load abrasion, during abrasion at self-control abrasive wear machine
Between be 30min, frosted is the quartz sand of 20 mesh, claims it weightless with the FA2004N type optical electrobalance that precision is 0.1mg after mill；Sliding
Dynamic wear test, sample is processed into 6.5mm × 6.5 mm × 30mm, is to carry out on MM 200 skimming wear machine in model, load
For 15kg, sample claims it weightless with optical electrobalance after 20min weares and teares.
The as-cast structure analysis of test steel:
Fig. 1 is test steel as-cast structure metallographic after model casting, as can be seen from the figure test the as-cast structure of steel be by
Eutectic ledeburite, dark structure, martensite and retained austenite composition.
Eutectic ledeburite is relatively fine, this mainly due to alloying element on the one hand test steel relative to W18Cr4V and
W6Mo5Cr4V2 steel to lack, and on the other hand adds Nb element in test steel, and Nb is that a kind of carbide more higher than V forms unit
Element, trace adds can refine primary grain, refining eutectic ledeburite, thus improves the size of eutectic carbide in as cast condition steel
And distribution；Compound Nb, V of adding can also be formed and the double carbide of molten steel similar density, and this just can alleviate because of VC and steel
The VC segregation that water density difference is relatively big and causes, improves the quality of cast sturcture[6]。
The wearability of test steel:
Test steel and the abrasive grain wear test curve of contrast steel grade and sliding wear testing curve are as shown in Figure 2,3.
The wearability of test steel is apparently higher than cast steel with high chromium close to common high speed steel W18Cr4V, and this is due to test
In eutectic carbide the most molten in steel and matrix, the composite carbon nitride (once with secondary precipitation) of W, Mo, V, Nb is to wearability
Contribution.
Claims (3)
1. a shear knife material preparation method, it is characterised in that include following processing step:
1), molten steel prepare, be sequentially added in vacuum induction furnace melting in order raw material steel scrap part, ferrochrome, ferrotungsten, molybdenum-iron,
Ferro-niobium, rare earth silicon, add VN alloy after molten steel is melting down, then with aluminium wire, molten steel carried out deoxidation alloying, then use fusible pattern
Casting is cast；
2), after casting, in as cast condition steel billet, the mass percent of each alloy element is: C0.75-1.05%, W2.5%, Mo2.0-
3.0%, V1.5-3.0%, Cr4.0%, Nb0.05%, Re0.1%, Ti0.08 ~ 0.12%, surplus be Fe, Re be rare earth silicon；
3), as cast condition steel billet through 800-850 DEG C annealing 1.8-2.2h after, quench, hardening heat is 1175-1250 DEG C, tempering
Temperature 400-560 DEG C, is tempered 3 times, is tempered 1 time every 2 hours；
4), then by the blade after tempering carrying out salt bath process, it is the hydrochloric acid solution of 28-32% that salt bath is processed as by mass concentration
In blade foundry goods is carried out salt bath, period carry out to hydrochloric acid solution sensing heating: room temperature～80 DEG C, the heating-up time be 0.6～
0.8h, is incubated 1-2h, is finally carried out with water.
Shear knife material preparation method the most according to claim 1, it is characterised in that respectively close in described as cast condition steel billet
The mass percent of gold chemical element is: C0.75%, W2.5%, Mo2.0%, V1.5%, Cr4.0%, Nb0.05%, Re0.1%,
Ti0.08%, surplus be Fe, Re be rare earth silicon.
Shear knife material preparation method the most according to claim 1, it is characterised in that respectively close in described as cast condition steel billet
The mass percent of gold chemical element is: C1.05%, W2.5%, Mo2.0%, V2.0%, Cr4.0%, Nb0.05%, Re0.1%,
Ti0.12%, surplus be Fe, Re be rare earth silicon.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610723811.3A CN106191635A (en) | 2016-08-25 | 2016-08-25 | A kind of shear knife material preparation method |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610723811.3A CN106191635A (en) | 2016-08-25 | 2016-08-25 | A kind of shear knife material preparation method |
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| CN106191635A true CN106191635A (en) | 2016-12-07 |
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| CN201610723811.3A Pending CN106191635A (en) | 2016-08-25 | 2016-08-25 | A kind of shear knife material preparation method |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111299988A (en) * | 2020-03-19 | 2020-06-19 | 马鞍山市申力特重工机械股份有限公司 | Manufacturing method of thick blade for plate shearing machine |
| CN114473371A (en) * | 2021-12-22 | 2022-05-13 | 马鞍山市申力特重工机械股份有限公司 | Preparation method of blade material on shearing machine and shearing test equipment |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101078091A (en) * | 2007-06-26 | 2007-11-28 | 郑州航空工业管理学院 | Casting high speed steel cutter and preparation method thereof |
-
2016
- 2016-08-25 CN CN201610723811.3A patent/CN106191635A/en active Pending
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101078091A (en) * | 2007-06-26 | 2007-11-28 | 郑州航空工业管理学院 | Casting high speed steel cutter and preparation method thereof |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111299988A (en) * | 2020-03-19 | 2020-06-19 | 马鞍山市申力特重工机械股份有限公司 | Manufacturing method of thick blade for plate shearing machine |
| CN111299988B (en) * | 2020-03-19 | 2021-11-12 | 马鞍山市申力特重工机械股份有限公司 | Manufacturing method of thick blade for plate shearing machine |
| CN114473371A (en) * | 2021-12-22 | 2022-05-13 | 马鞍山市申力特重工机械股份有限公司 | Preparation method of blade material on shearing machine and shearing test equipment |
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Application publication date: 20161207 |