CN106756597B - The preparation method and applications of CFW composite high-speed steels - Google Patents
The preparation method and applications of CFW composite high-speed steels Download PDFInfo
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- CN106756597B CN106756597B CN201611132402.2A CN201611132402A CN106756597B CN 106756597 B CN106756597 B CN 106756597B CN 201611132402 A CN201611132402 A CN 201611132402A CN 106756597 B CN106756597 B CN 106756597B
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- speed steel
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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
- C22C38/34—Ferrous alloys, e.g. steel alloys containing chromium with more than 1.5% by weight of silicon
-
- 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
- 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
- C22C33/00—Making ferrous alloys
- C22C33/02—Making ferrous alloys by powder metallurgy
- C22C33/0257—Making ferrous alloys by powder metallurgy characterised by the range of the alloying elements
- C22C33/0278—Making ferrous alloys by powder metallurgy characterised by the range of the alloying elements with at least one alloying element having a minimum content above 5%
- C22C33/0285—Making ferrous alloys by powder metallurgy characterised by the range of the alloying elements with at least one alloying element having a minimum content above 5% with Cr, Co, or Ni having a minimum content higher than 5%
-
- 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
-
- 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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- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Materials Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Crystallography & Structural Chemistry (AREA)
- Powder Metallurgy (AREA)
Abstract
The invention discloses the preparation method and applications of CFW composite high-speed steels, 1) raw material is weighed according to component and proportioning, the wet ball grinding in ball mill；2) by cold isostatic compaction by mixture isostatic cool pressing；3) material for obtaining step 2) sinters in a vacuum or inert atmosphere；4) high-speed steel base substrate is heated to hardening heat in salt bath furnace；High-speed steel base substrate is subjected to temper after quenching.The present invention obtains a series of high-speed steel for premium properties such as intensity and hardness are high, wearability is good, red hardness is good, thermal coefficient of expansion is small, modulus of elasticity is high and chemical stability is good by the particular technique means of temperature in hot pressed sintering, time, pressure.The high-speed steel has used the aboundresources of high content, cheap Si, considerably reduces noble element content.
Description
Technical field
The present invention relates to the preparation method and applications of CFW composite high-speed steels.
Background technology
High-speed steel is the main material for making tool and mould.Conventional metallurgical casting high speed steel is ledeburite steel, and steel ingot is solidifying
When formed Lai Shi eutectics, Lai Shi it is eutectiferous exist cause eutectic carbide that have bulk in steel, more, by rolling or
These eutectic carbides are still in uneven distribution after calendering.With the increase of alloy content and steel product cross-sectional product increase, high-speed steel
Middle carbide segregation aggravates, and which results in the decline of high speed hardness of steel, it is difficult to the performance with high-speed steel.To understand
Certainly this problem, generate " PM HSS ".The superiority of PM HSS be embodied in no matter size and
How is shape, is respectively provided with the microscopic structure feature that carbide particle is tiny, inclusion content is few, is evenly distributed, makes high-speed steel
Bending strength, hardness and cutting ability are significantly improved.But the technique of current PM HSS is considerably complicated, includes
The processing steps such as melting, powder by atomization, encapsulation, high temperature insostatic pressing (HIP), wherein needing the melting atomization plant of costliness and high temperature insostatic pressing (HIP) to set
It is standby, and in material melting preparation process, the impurity content control difficulty of material is high, therefore the price of PM HSS
It is very expensive.
The content of the invention
In order to solve the above problems, the present invention provides a kind of preparation method of CFW composite high-speed steels,
1) according to 5.0~6.2wt%W, 3.1~3.5wt%Mo, 5.1~6.0wt%Cr, 0.5~0.7wt%V, 0.1~
0.2wt%Co, 0.5~0.7wt%C, 3.1~3.4wt%Si component and proportioning weigh raw material, the wet ball grinding in ball mill
8~10 hours；
2) the mixture 2~5min of isostatic cool pressing for being obtained step 1) by cold isostatic compaction, pressure be 200~
320MPa；
3) material for obtaining step 2) sinters in a vacuum or inert atmosphere, and temperature is 1000~1050 DEG C, and is incubated,
20~70min, sintering pressure are 5~10Mpa, cooling；
4) high-speed steel base substrate is heated to 1050~1130 DEG C of hardening heat in salt bath furnace, then water cooling to room temperature；Quench
High-speed steel base substrate is subjected to temper at 550~600 DEG C of temperature after fire, tempering time is 0.5~1.5 hour, tempering time
Number is 2~5 times.
Further, in the above-mentioned technical solutions, impurity element P and S content is respectively smaller than in high speed steel material
0.02wt%；Remaining is Fe.
Further, in the above-mentioned technical solutions, temper is carried out in Muffle furnace in the step 4).
The present invention provides the CFW composite high-speed steels that a kind of preparation method of above-mentioned CFW composite high-speed steels obtains and is preparing drawing
Application in knife.
Invention beneficial effect
The preparation method of the CFW composite high-speed steels of the present invention can be by adjusting metal carbides in raw material, nitride
Component, granularity etc. realize the adjustment to PM HSS hardness, bending strength, reach excellent comprehensive mechanical property.With
Prior powder metallurgy high-speed steel preparation technology compares, hard phase composition of the present invention to PM HSS and content regulation pole
For convenience, widely using for machinery manufacturing industry is advantageous to.The specific skill that the present invention passes through temperature, time, pressure in hot pressed sintering
Art means obtain intensity and hardness height, wearability is good, red hardness is good, thermal coefficient of expansion is small, modulus of elasticity is high and chemically stable
Property a series of premium properties such as good high-speed steel.The high-speed steel has used the aboundresources of high content, cheap Si, significantly drops
Low noble element content.
Embodiment
Following nonlimiting examples can make one of ordinary skill in the art be more fully understood the present invention, but not with
Any mode limits the present invention.
Embodiment 1
A kind of preparation method of CFW composite high-speed steels,
1) according to 5.0wt%W, 3.1wt%Mo, 5.1wt%Cr, 0.5wt%V, 0.1wt%Co, 0.5wt%C,
3.1wt%Si component and proportioning weighs raw material, wet ball grinding 8~10 hours in ball mill；Impurity member in high speed steel material
Plain P and S contents are respectively smaller than 0.02wt%；Remaining is Fe.
2) mixture the isostatic cool pressing 2min, pressure 320MPa for being obtained step 1) by cold isostatic compaction；
3) material for obtaining step 2) sinters in a vacuum or inert atmosphere, and temperature is 1000 DEG C, and is incubated, 70min,
Sintering pressure is 5Mpa, cooling；
4) high-speed steel base substrate is heated to 1050 DEG C of hardening heat in salt bath furnace, then water cooling to room temperature；Will after quenching
High-speed steel base substrate carries out temper at 550 DEG C of temperature, and tempering time is 1.5 hours, and times of tempering is 2 times.Temper
Carried out in Muffle furnace.
Embodiment 2
A kind of preparation method of CFW composite high-speed steels,
1) according to 6.2wt%W, 3.5wt%Mo, 6.0wt%Cr, 0.7wt%V, 0.2wt%Co, 0.7wt%C,
3.4wt%Si component and proportioning weighs raw material, wet ball grinding 10 hours in ball mill；Impurity element P in high speed steel material
0.02wt% is respectively smaller than with S contents；Remaining is Fe.
2) mixture the isostatic cool pressing 5min, pressure 200MPa for being obtained step 1) by cold isostatic compaction；
3) material for obtaining step 2) sinters in a vacuum or inert atmosphere, and temperature is 1050 DEG C, and is incubated, 70min,
Sintering pressure is 5~10Mpa, cooling；
4) high-speed steel base substrate is heated to 1130 DEG C of hardening heat in salt bath furnace, then water cooling to room temperature；Will after quenching
High-speed steel base substrate carries out temper at 600 DEG C of temperature, and tempering time is 0.5 hour, and times of tempering is 5 times.Temper
Carried out in Muffle furnace.
Claims (2)
- The preparation method of 1.CFW composite high-speed steels, it is characterised in that：High speed steel material basic composition is,1) according to 5.0 ~ 6.2wt%W, 3.1 ~ 3.5wt%Mo, 5.1 ~ 6.0wt%Cr, 0.5 ~ 0.7wt%V, 0.1 ~ 0.2wt% Co, 0.5 ~ 0.7wt%C, 3.1 ~ 3.4wt%Si component and proportioning weigh raw material, wet ball grinding 8 ~ 10 hours in ball mill；2) by cold isostatic compaction by step 1）Obtained mixture 2 ~ 5min of isostatic cool pressing, pressure are 200 ~ 320MPa；3) by step 2）Obtained material sinters in a vacuum or inert atmosphere, and temperature is 1000 ~ 1050 DEG C, and is incubated, 20 ~ 70 Min, sintering pressure are 5 ~ 10MPa, cooling；4) high-speed steel base substrate is heated to 1050 ~ 1130 DEG C of hardening heat in salt bath furnace, then water cooling to room temperature；Will after quenching High-speed steel base substrate carries out temper at 550 ~ 600 DEG C of temperature, and tempering time is 0.5 ~ 1.5 hour, and times of tempering is 2 ~ 5 It is secondary；Impurity element P and S content is respectively smaller than 0.02wt% in high speed steel material；Remaining is Fe；Temper is carried out in Muffle furnace in the step 4).
- 2. the CFW composite high-speed steels that the preparation method of CFW composite high-speed steels as claimed in claim 1 obtains are in broaching tool is prepared Using.
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| CN106756597B true CN106756597B (en) | 2018-02-23 |
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| JPH03285040A (en) * | 1990-04-02 | 1991-12-16 | Sumitomo Electric Ind Ltd | Manufacture of powder high speed steel |
| JPH0633200A (en) * | 1992-07-15 | 1994-02-08 | Toshiba Corp | Vane for rotary compressor |
| CN103212777A (en) * | 2013-04-01 | 2013-07-24 | 大连经济技术开发区圣洁真空技术开发有限公司 | Carbide-segregation-free CFW (Casting, Forging and Welding) high-speed steel and processing process thereof |
| CN103667873B (en) * | 2013-12-30 | 2016-02-24 | 长沙市萨普新材料有限公司 | P/m high speed steel and preparation method thereof |
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Effective date of registration: 20201119 Address after: No.2 and No.1, building 8, No.3, Wanquanhe Road, Xiapu, Beilun District, Ningbo City, Zhejiang Province Patentee after: Ningbo Xinzhao precision stainless steel Co., Ltd Address before: 116000 1-6, Tieshan East Road, Jinzhou New District, Liaoning, Dalian, China Patentee before: DALIAN SHENGJIE HEAT TREATMENT TECHNOLOGY DEVELOPMENT Co.,Ltd. |
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Denomination of invention: Preparation method and application of CFW composite high speed steel Effective date of registration: 20210901 Granted publication date: 20180223 Pledgee: Ningbo Beilun Rural Commercial Bank Co.,Ltd. Xiapu sub branch Pledgor: Ningbo Xinzhao precision stainless steel Co., Ltd Registration number: Y2021980008723 |