CN107475632B - A kind of wear-resistant high speed steel coating and preparation method thereof of high tungsten content - Google Patents
A kind of wear-resistant high speed steel coating and preparation method thereof of high tungsten content Download PDFInfo
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- CN107475632B CN107475632B CN201710716511.7A CN201710716511A CN107475632B CN 107475632 B CN107475632 B CN 107475632B CN 201710716511 A CN201710716511 A CN 201710716511A CN 107475632 B CN107475632 B CN 107475632B
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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
- C22C38/30—Ferrous alloys, e.g. steel alloys containing chromium with cobalt
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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
- C22C38/02—Ferrous alloys, e.g. steel alloys containing silicon
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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
- C22C38/04—Ferrous alloys, e.g. steel alloys containing manganese
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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
- C22C38/22—Ferrous alloys, e.g. steel alloys containing chromium with molybdenum or tungsten
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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
- C22C38/24—Ferrous alloys, e.g. steel alloys containing chromium with vanadium
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- C—CHEMISTRY; METALLURGY
- C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
- C23C—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
- C23C24/00—Coating starting from inorganic powder
- C23C24/08—Coating starting from inorganic powder by application of heat or pressure and heat
- C23C24/10—Coating starting from inorganic powder by application of heat or pressure and heat with intermediate formation of a liquid phase in the layer
- C23C24/103—Coating with metallic material, i.e. metals or metal alloys, optionally comprising hard particles, e.g. oxides, carbides or nitrides
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Abstract
The invention discloses a kind of wear-resistant high speed steel coatings and preparation method thereof of high tungsten content, belong to metallurgical technology field.The coating is prepared using laser melting coating quick setting method, main chemical compositions weight percentage are as follows: 0.9~1.3C, 7~14W, 6~9Mo, 1.0~2.0V, 3.5~5.0Cr, 0.5~5.0Co, Si < 0.5, Mn < 1.0, S < 0.04, P < 0.04, surplus Fe.Coating directly can significantly improve its hardness in 470~560 DEG C of progress temperings after laser melting coating.Compared with the tungsten system W6Mo5Cr4V2 high-speed steel of the same terms preparation, high tungsten content increases hard carbide content in its tempered structure, tempering hardness and abrasion resistance properties significantly improve, thus are applicable to the hot roll having higher requirements to high rigidity, high abrasion, cutlery and the manufacture of die surface laser melting coating high abrasion coating.
Description
Technical field
The invention belongs to metallurgical technology fields, and in particular to a kind of the wear-resistant high speed steel coating and its laser of high tungsten content
Cladding preparation method.
Background technique
High-speed steel is a kind of high-alloy steel of a variety of carbides such as tungstenic, molybdenum, chromium, vanadium, and process is appropriate
After heat treatment, have excellent red hardness, thermal stability, resistance to oxidation and Hot wear performance, be widely used in grinding tool, cutter,
The surface covering manufacturing field of cutlery, hot roll and such material.The wearability of high-speed steel depends primarily in its tissue
Carbide and content, hard carbide content is more, size is thinner, distribution is more uniform, and wearability is better.
High-speed steel adds type classification according to alloying element, and typical composition is tungsten system W18Cr4V and tungsten system
W6Mo5Cr4V2, W9Cr4Mo3V etc..Wherein, W is replaced using Mo, not only hardness is close for tungsten molybdenum high speed steel, and reduces coarse
The precipitation of tungsten carbide is grown, and has higher toughness and thermoplasticity.In order to improve the red hardness and high temperature abrasion resistance of high-speed steel,
Studies have developed cobalt-containing high speed steel W18Cr4VCo5, W6Mo5Cr4V2Co5 and obtain good production application.In addition, high speed
Steel is applied to roll material, and ingredient tends to be designed to high-carbon high-alloy element to guarantee carbide content and wearability.Such as:
Chinese patent CN105750529A makes method using centrifugal casting and proposes a kind of high tungsten high abrasion high-speed steel roll, chemical composition matter
Amount score be 2.2~2.5%C, 6.5~6.8%W, 8.6~9.0%Cr, 4.2~4.5%V, 2.5~2.8%Mo, < 0.45%
Mn, < 0.76%Si, < 0.04%P, < 0.04%S.Chinese patent CN105779861A and CN105618715A are then proposed respectively
A kind of wear-resisting high vanadium nitrogen high-speed steel roll and a kind of high-speed steel roll for adding Nb, it is seen then that adding carbide is
Improve a kind of effective ways of high-speed steel wearability.
But, it is considered that the addition too high levels of carbide in high speed composition of steel, manufacturing process is no matter
Be using melting, pour or casting-forging process be difficult to overcome its internal coarse primary carbide to be formed, serious component segregation
With the metallurgical imperfections such as tissue deterioration, the toughness of material is caused to deteriorate, crackle is easily formed along carbide substrate interface, cracking.Recently,
Have been reported that, using the flash set technologies such as jet deposition, laser melting coating manufacture high speed steel coating, research finds prepared by such method
Coating there is the tiny feature of solidified structure.But such technology is still mainly continued to use on ingredient and heat treatment technics at present
Traditional block high speed composition of steel and high temperature quench add-back fire treatment process, due to quickly solidify inhibit carbide precipitation and
It grows, is generally found that hard phase content is considerably less than the block high-speed steel of identical component in the coating of such method preparation, and adopt
Coating solidified structure is easily caused to grow up a large amount of oxidation losses with material again with high temperature quenching add-back fire treatment process.As it can be seen that needle
Prepared by high-hardness, wearable high speed steel material and coating to quick solidification, targetedly ingredient design and system are urgently proposed in production
Standby process.
Summary of the invention
In order to overcome the deficiencies of the prior art, technical problem solved by the invention is: preparing in conjunction with laser rapid solidification high
The dynamics curing condition of alloy material proposes that one kind can add the height of high level carbide (Mo, W) simultaneously
Fast composition of steel and its laser melting coating preparation method are apparently higher than the typical case prepared under the same terms to prepared coating hardness
Ingredient tungsten system W6Mo5Cr4V2 high-speed steel, suitable for the hot roll, cutlery and mould having higher requirements to high rigidity, high-temperature wearable
Has the manufacture of surface laser cladding high abrasion coating.
The technical solution that the present invention solves its technical problem is as follows:
The present invention provides a kind of wear-resistant high speed steel coating of high tungsten content, the wear-resistant high speed steel coating primary chemical at
Point and its weight percentage are as follows: 0.9~1.3%C, 7~14%W, 6-9%Mo, 1.0-2.0%V, 3.5-5.0%Cr, 0.5-
5.0%Co, Si < 0.5%, Mn < 1.0%, S < 0.04%, P < 0.04%, surplus Fe.
Invention also provides the preparation methods of the wear-resistant high speed steel coating of above-mentioned high tungsten content, and the coating is using sharp
The preparation of light cladding quick setting method, coating is not required to be quenched by high temperature after preparation, can be directly between 470~560 DEG C
Its timeliness hardness can be significantly improved by carrying out 2~3 temperings.
Compared with prior art, the present invention has following technical effect that
1, the flash set technologies such as laser melting coating preparation high speed steel coating can play the role of thinning microstructure, but quickly solidification
It can inhibit and reduce simultaneously the precipitation content of hard carbide phase in coating.Therefore, present invention combination laser melting coating is conducive to mention
The dynamics curing condition of high alloy element solid solution degree, a kind of high tungsten suitable for quickly solidifying technology of preparing that specific aim proposes
Molybdenum content wear-resistant high speed steel ingredient.
Compared with the tungsten molybdenum high speed steel typical composition W6Mo5Cr4V2 prepared under same laser technique, while adding higher
Content W, Mo carbide can significantly improve the precipitation content of hard carbide phase in laser melting coating high speed steel coating,
Thus hardness and the wear-resisting property such as after improving its timeliness.
Compared with conventional melting technique prepares high-speed steel, laser melting coating inhibits the solidification of carbide to be precipitated and fast fast-growing
It is long, had no in high tungsten content high speed steel coating solidified structure proposed by the present invention coarse primary carbide formed and it is serious at
Divide segregation, solves the metallurgical imperfections such as the tissue deterioration that high W, Mo content high-speed steel is easily occurred using conventional melting technology of preparing and ask
Topic.
2, a kind of high tungsten content wear-resistant high speed steel ingredient proposed by the present invention and its laser melting coating preparation method, research hair
Existing coated laser does not need higher temperature solid solution after quickly solidifying, and can carry out at 2~3 tempering directly between 470~560 DEG C
Reason.This method is the fast growth of crystal grain during can avoid high temperature Quench heating, retains laser rapid solidification fine microstructures
Feature also can avoid the high-temperature oxydation scaling loss of coating material and energy saving.Moreover, still can promote carbonization after coating direct tempering
The precipitation of object promotes complete transformation of the retained austenite to martensite in solidified structure, significantly improves hardness.
Detailed description of the invention
Fig. 1 is that the X that 530 DEG C of laser melting coating M2 and No.1 two-component coating is tempered front and back three times in the embodiment of the present invention 1 is penetrated
Line diffraction spectra comparison diagram.
Fig. 2 is the scanning electron microscope that 530 DEG C of laser melting coating M2 ingredient coating is organized after being tempered three times in the embodiment of the present invention 1
Figure.
Fig. 3 is the scanning electron microscope that 530 DEG C of laser melting coating No.1 ingredient coating is organized after being tempered three times in the embodiment of the present invention 1
Figure.
Specific embodiment
A kind of wear-resistant high speed steel coating and preparation method thereof of high tungsten content proposed by the present invention.It is needed before laser melting coating
According to being designed to that distribution sets and prepare raw material and powder, powder raw material preparation method can use water atomization, aerosolization or
Mechanical ball mill alloying etc., these powder preparation methods and technology are that professional is familiar with, and are no longer repeated one by one in this.
Below in conjunction with drawings and the specific embodiments, the invention will be further described.
The M2 trade mark is tungsten system W6Mo5Cr4V2 high-speed steel typical composition in 1 ingredient lists of table, and number No.1~No.5 is
Five groups of ingredients of the high tungsten content wear-resistant high speed steel that the present embodiment is prepared using laser melting and coating technique.Sample preparation: first
First, Fe, Mo, W, Cr, V, Co alloy powder for choosing purity >=99.5% are configured according to weight percent, configure good above-mentioned alloy
After element according to configuration total weight further add the elements such as C, Si, Mn, wherein S, P element content < 0.04%；To then it match
The alloy powder set is placed in ball mill and mixes 30 minutes；Then, CO is utilized2Cross-flow laser is with synchronous mode automatic powder feeding system etc.
Conventional laser cladding method is by the multicomponent High Speed Steel Powders cladding being uniformly mixed to No. 45 steel base metal surfaces；Again so
Afterwards, the painting after laser melting coating is placed in heat-treatment furnace and carries out 2~3 temperings in 440~560 DEG C of temperature ranges, often
Secondary tempering respectively keeps the temperature 1 hour.
Fig. 1 is that 530 DEG C of laser melting coating M2 and No.1 two-component high speed steel coating is tempered front and back three times in the embodiment of the present invention
X-ray diffraction spectrum comparison, it can be seen that main phase structure is martensite, retained austenite and a small amount of carbonization after sample solidification
Object, retained austenite disappears after tempering.Simultaneously, it is seen that the diffraction peak intensity of carbide is slightly above M2 board in No.1 ingredient high-speed steel
Number W6Mo5Cr4V2 ingredient high-speed steel.Show the forming core and the growth that inhibit carbide hard phase due to laser rapid solidification, increases
Adding carbide W, Mo content in high-speed steel is to increase the effective way of carbide content and wearability.Fig. 2 and Fig. 3
It is followed successively by scanning electron microscope tissue after 530 DEG C of laser melting coating W6Mo5Cr4V2 ingredient high-speed steel and number No.1 sample are tempered three times,
It can be seen that two matrix of samples tissues are tempered martensite, in grain boundaries Dispersed precipitate carbide hard phase.Meanwhile it numbering
Carbide has still maintained the distribution characteristics of small and dispersed in No.1 sample, and hard carbide phase content is apparently higher than the M2 trade mark
W6Mo5Cr4V2 ingredient high-speed steel.
Hardness results show that ingredient described in specific embodiment carries out 2~3 times in 440~560 DEG C of temperature ranges and returns
Apparent age-hardening performance is all had after fire processing.Wherein, table 1 gives the hardness after each ingredient sample laser photocoagulation, with
And the maximum tempering hardness after 440~560 DEG C of temperature ranges carry out 2~3 temperings.It can be seen that the high tungsten in No.1~No. 5
Molybdenum ingredient high speed steel coating maximum tempering hardness is above the tempering hardness of M2 trade mark W6Mo5Cr4V2 high-speed steel.Polishing machine is surveyed
The wear resistance that test result also shows the high tungsten content high speed steel coating in laser melting coating No.1~No. 5, which is higher than under same process, to be made
Standby W6Mo5Cr4V2 high speed steel coating.
Ingredient described in 1 specific embodiment of table, solidification hardness and maximum tempering hardness
| The trade mark | Mo | W | Cr | V | Co | C | Si | Mn | Fe | Solidify hardness | Tempering hardness |
| M2 | 5 | 6 | 4.2 | 2.0 | -- | 0.95 | 0.2 | 0.3 | base | 645 | 813 |
| No.1 | 7.67 | 14 | 4.2 | 2.0 | 4.81 | 0.95 | 0.2 | 0.3 | base | 692 | 875 |
| No.2 | 9 | 7 | 3.5 | 1.92 | 5.0 | 0.90 | 0.2 | 0.3 | base | 654 | 844 |
| No.3 | 9 | 7 | 3.5 | 1.92 | 5.0 | 1.1 | 0.2 | 0.3 | base | 662 | 861 |
| No.4 | 9 | 7 | 5.0 | 1.92 | 5.0 | 1.3 | 0.2 | 0.3 | base | 668 | 884 |
| No.5 | 6 | 12 | 4.2 | 1.0 | 0.5 | 1.1 | 0.5 | 1.0 | base | 680 | 846 |
Claims (1)
1. a kind of wear-resistant high speed steel coating of high tungsten content, it is characterised in that: the coating uses the laser melting coating quickly side of solidification
Method preparation, coating is not required to be quenched by high temperature after preparation, can be directly in 470~560 DEG C of progress temperings；It is described wear-resisting
High speed steel coating chemical component and its weight percentage are as follows:
Surplus is Fe.
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| CN114427090B (en) * | 2020-10-14 | 2024-03-26 | 无锡朗贤轻量化科技股份有限公司 | High-strength and high-toughness die steel product for blanking and additive manufacturing process thereof |
| CN115142061B (en) * | 2022-07-05 | 2023-08-11 | 北京工业大学 | Preparation method of wear-resistant high-speed steel composite roller |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS62224529A (en) * | 1986-03-25 | 1987-10-02 | Daido Steel Co Ltd | Manufacture for tool |
| CN1264749A (en) * | 2000-03-24 | 2000-08-30 | 冶金工业部钢铁研究总院 | High-speed antiwear cast steel |
| CN101586214A (en) * | 2009-06-29 | 2009-11-25 | 河冶科技股份有限公司 | High-hardness high-wear-resistant powder metallurgy high-speed steel |
| CN104250801A (en) * | 2013-06-28 | 2014-12-31 | 沈阳大陆激光成套设备有限公司 | Process for performing laser cladding on alloy coating with characteristics of wear resistance and heat resistance by hot rolling of seamless steel pipe |
| CN104878301A (en) * | 2015-05-15 | 2015-09-02 | 河冶科技股份有限公司 | Spray forming high-speed steel |
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2017
- 2017-08-21 CN CN201710716511.7A patent/CN107475632B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS62224529A (en) * | 1986-03-25 | 1987-10-02 | Daido Steel Co Ltd | Manufacture for tool |
| CN1264749A (en) * | 2000-03-24 | 2000-08-30 | 冶金工业部钢铁研究总院 | High-speed antiwear cast steel |
| CN101586214A (en) * | 2009-06-29 | 2009-11-25 | 河冶科技股份有限公司 | High-hardness high-wear-resistant powder metallurgy high-speed steel |
| CN104250801A (en) * | 2013-06-28 | 2014-12-31 | 沈阳大陆激光成套设备有限公司 | Process for performing laser cladding on alloy coating with characteristics of wear resistance and heat resistance by hot rolling of seamless steel pipe |
| CN104878301A (en) * | 2015-05-15 | 2015-09-02 | 河冶科技股份有限公司 | Spray forming high-speed steel |
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