CN102451907A - Preparation method for high-performance powder metallurgy material - Google Patents
Preparation method for high-performance powder metallurgy material Download PDFInfo
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- CN102451907A CN102451907A CN2010105230158A CN201010523015A CN102451907A CN 102451907 A CN102451907 A CN 102451907A CN 2010105230158 A CN2010105230158 A CN 2010105230158A CN 201010523015 A CN201010523015 A CN 201010523015A CN 102451907 A CN102451907 A CN 102451907A
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Abstract
The invention provides a preparation method for a high-performance powder metallurgy material. The method comprises the following steps of: mixing 6-8 percent by weight of Mo powder, 6-8 percent by weight of W powder, 1.8-2 percent by weight of C powder, 0.5-1 percent by weight of P powder and the balance of Fe powder; pressing; axially pressurizing; sintering; performing thermal treatment and the like. The high-performance powder metallurgy material prepared with the method has high physical properties, the hardness (HRC) is up to 60-68, the bending strength is up to 1,000-1,200 MPa, and the impact ductility is up to 7.5-8.3 J.cm<-2>.
Description
Technical field
The present invention relates to a kind of preparation method of high-performance powder metallurgy material.
Background technology
Its material not only needs high intensity and toughness in the use of cutting tool, also need under the high temperature more than the 800K, keep high hardness.Existing cutting tool adopts carbide material or high-speed steel to make usually.Carbide material exists significant disadvantages, promptly is difficult to be processed into complicated cutting surface, and in working angles, collapses cutter easily because toughness is lower.High-speed steel has good toughness, but does not have the high temperature hardness and the wearability of carbide material.
Summary of the invention
The purpose of this invention is to provide a kind of existing excellent toughness and intensity, the preparation method of the high-performance powder metallurgy material of good hot hardness and wearability is arranged again.
In order to achieve the above object, the technical scheme that the present invention adopted may further comprise the steps:
A. be 6～8% Mo powder, 6～8% W powder, 1.8～2% C powder, 0.5～1% P powder and the Fe powder batching of surplus with percentage by weight; Powder size is 100～200 orders; Add percentage by weight and be 0.1～1.0% lubricant and carry out ball mill mixing again, incorporation time is 0.5～2 hour;
B. under the pressure of 500～600Mpa, suppress;
C. be 1200～1300 ℃ of axial pressure sinterings down in temperature, pressure is 0.1～1Mpa, temperature retention time 1.5～2.5 hours;
D. be 950～1100 ℃ in temperature and quench temperature retention time 20～35 minutes down; In temperature is 450～600 ℃ of following tempering, temperature retention time 40～80 minutes.
As improvement of the present invention, said lubricant is a zinc stearate.
Adopt the preparation method of the high-performance powder metallurgy material of method for preparing to have good physical property, hardness (HRC) reaches 60～68, and bending strength reaches 1000～1200MPa, and impact flexibility reaches 7.5～8.3Jcm
-2
The specific embodiment
Embodiment one:
A. be 6% Mo powder, 7.8% W powder, 1.8% C powder, 0.5% P powder and the Fe powder batching of surplus with percentage by weight, powder size is 100 orders, adds percentage by weight and is 0.1% lubricant and carry out ball mill mixing again, and incorporation time is 0.5 hour;
B. under the pressure of 500Mpa, suppress;
C. be 1200 ℃ of axial pressure sinterings down in temperature, pressure is 1Mpa, temperature retention time 2.5 hours;
D. be 950 ℃ in temperature and quench temperature retention time 20 minutes down; In temperature is 600 ℃ of following tempering, temperature retention time 40 minutes.
The preparation method of the high-performance powder metallurgy material of preparation has good physical property, and hardness (HRC) reaches 60, and bending strength reaches 1000MPa, and impact flexibility reaches 7.5Jcm
-2
Embodiment two:
A. be 8% Mo powder, 6% W powder, 2% C powder, 1% P powder and the Fe powder batching of surplus with percentage by weight, powder size is 200 orders, adds percentage by weight and is 1.0% lubricant and carry out ball mill mixing again, and incorporation time is 1.5 hours;
B. under the pressure of 600Mpa, suppress;
C. be 1300 ℃ of axial pressure sinterings down in temperature, pressure is 0.1Mpa, temperature retention time 2.0 hours;
D. be 1100 ℃ in temperature and quench temperature retention time 35 minutes down; In temperature is 450 ℃ of following tempering, temperature retention time 80 minutes.
The preparation method of the high-performance powder metallurgy material of preparation has good physical property, and hardness (HRC) reaches 65, and bending strength reaches 1150MPa, and impact flexibility reaches 8Jcm
-2
Embodiment three:
A. be 6.8% Mo powder, 8% W powder, 1.8% C powder, 0.8% P powder and the Fe powder batching of surplus with percentage by weight, powder size is 150 orders, adds percentage by weight and is 0.8% zinc stearate and carry out ball mill mixing again, and incorporation time is 2 hours;
B. under the pressure of 560Mpa, suppress;
C. be 1270 ℃ of axial pressure sinterings down in temperature, pressure is 0.8Mpa, temperature retention time 1.5 hours;
D. be 1000 ℃ in temperature and quench temperature retention time 28 minutes down; In temperature is 550 ℃ of following tempering, temperature retention time 60 minutes.
The high-performance powder metallurgy material of preparation has good physical property, and hardness (HRC) reaches 68, and bending strength reaches 1200MPa, and impact flexibility reaches 8.3Jcm
-2
Claims (2)
1. the preparation method of a high-performance powder metallurgy material is characterized in that, may further comprise the steps:
A. be 6～8% Mo powder, 6～8% W powder, 1.8～2% C powder, 0.5～1% P powder and the Fe powder batching of surplus with percentage by weight; Powder size is 100～200 orders; Add percentage by weight and be 0.1～1.0% lubricant and carry out ball mill mixing again, incorporation time is 0.5～2 hour;
B. under the pressure of 500～600Mpa, suppress;
C. be 1200～1300 ℃ of axial pressure sinterings down in temperature, pressure is 0.1～1Mpa, temperature retention time 1.5～2.5 hours;
D. be 950～1100 ℃ in temperature and quench temperature retention time 20～35 minutes down; In temperature is 450～600 ℃ of following tempering, temperature retention time 40～80 minutes.
2. according to the preparation method of the high-performance powder metallurgy material of claim 1, it is characterized in that said lubricant is a zinc stearate.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010105230158A CN102451907A (en) | 2010-10-28 | 2010-10-28 | Preparation method for high-performance powder metallurgy material |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010105230158A CN102451907A (en) | 2010-10-28 | 2010-10-28 | Preparation method for high-performance powder metallurgy material |
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| Publication Number | Publication Date |
|---|---|
| CN102451907A true CN102451907A (en) | 2012-05-16 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN2010105230158A Pending CN102451907A (en) | 2010-10-28 | 2010-10-28 | Preparation method for high-performance powder metallurgy material |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102814495A (en) * | 2012-09-10 | 2012-12-12 | 北京科技大学 | Method for improving iron powder forming property |
| CN103464762A (en) * | 2013-07-26 | 2013-12-25 | 安庆市德奥特汽车零部件制造有限公司 | Powder metallurgy piston ring material and preparation method thereof |
-
2010
- 2010-10-28 CN CN2010105230158A patent/CN102451907A/en active Pending
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102814495A (en) * | 2012-09-10 | 2012-12-12 | 北京科技大学 | Method for improving iron powder forming property |
| CN102814495B (en) * | 2012-09-10 | 2014-09-17 | 北京科技大学 | Method for improving iron powder forming property |
| CN103464762A (en) * | 2013-07-26 | 2013-12-25 | 安庆市德奥特汽车零部件制造有限公司 | Powder metallurgy piston ring material and preparation method thereof |
| CN103464762B (en) * | 2013-07-26 | 2016-04-13 | 安庆市德奥特汽车零部件制造有限公司 | A kind of P/M piston rings material and preparation method thereof |
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Application publication date: 20120516 |