CN102453836A - Method for preparing powder metallurgy high-alloy steel material - Google Patents
Method for preparing powder metallurgy high-alloy steel material Download PDFInfo
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- CN102453836A CN102453836A CN2010105230139A CN201010523013A CN102453836A CN 102453836 A CN102453836 A CN 102453836A CN 2010105230139 A CN2010105230139 A CN 2010105230139A CN 201010523013 A CN201010523013 A CN 201010523013A CN 102453836 A CN102453836 A CN 102453836A
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Abstract
The invention provides a method for preparing a powder metallurgy high-alloy steel material, which comprises the steps of proportioning, mixing, pressing, sintering, heat treatment and the like performed on 6-8% of Mo powder, 6-8% of W powder, 1.8-2% of C powder and the balance of Fe powder by weight. The powder metallurgy high-alloy steel material prepared by using the method has good physical performance, the hardness (HRC) reaches 50-60, the bending strength reaches 800-900 MPa, and the impact toughness reaches 5.5-7 J.cm<-2>.
Description
Technical field
The present invention relates to a kind of powder metallurgy high quality steel preparation methods.
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 rapid 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.Rapid steel has good toughness, but does not have the hot hardness and the wear resistance of carbide material.
Summary of the invention
The purpose of this invention is to provide a kind of existing excellent toughness and intensity, the powder metallurgy high quality steel preparation methods of good hot hardness and wear resistance 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 and the Fe powder batching of surplus with weight percent; Powder size is 100～200 orders; Add weight percent and be 0.1～1.0% lubricant and carry out ball mill mixing again, mixing time is 0.5～2 hour;
B. under the pressure of 500～600Mpa, suppress;
C. be 1200～1300 ℃ of following sintering in temperature, soaking time 1.5～2.5 hours;
D. be 950～1100 ℃ in temperature and quench soaking time 20～35 minutes down; In temperature is 450～600 ℃ of following tempering, soaking time 40～80 minutes.
As improvement of the present invention, said lubricant is a Zinic stearas.
As further improvement of the present invention, said sintering is in vacuum degreasing sintered all-in-one oven, to carry out.
Adopt the powder metallurgy high quality steel material of method for preparing to have good physicals, hardness (HRC) reaches 50～60, and bending strength reaches 800～900MPa, and impelling strength reaches 5.5～7Jcm
-2
Embodiment
Embodiment one:
A. be 6% Mo powder, 7.8% W powder, 1.8% C powder and the Fe powder batching of surplus with weight percent, powder size is 100 orders, adds weight percent and is 0.1% lubricant and carry out ball mill mixing again, and mixing time is 0.5 hour;
B. under the pressure of 500Mpa, suppress;
C. be 1200 ℃ of following sintering in temperature, soaking time 2.5 hours;
D. be 950 ℃ in temperature and quench soaking time 20 minutes down; In temperature is 600 ℃ of following tempering, soaking time 40 minutes.
The powder metallurgy high quality steel material of preparation has good physicals, and hardness (HRC) reaches 50, and bending strength reaches 800MPa, and impelling strength reaches 5.5Jcm
-2
Embodiment two:
A. be 8% Mo powder, 6% W powder, 2% C powder and the Fe powder batching of surplus with weight percent, powder size is 200 orders, adds weight percent and is 1.0% lubricant and carry out ball mill mixing again, and mixing time is 1.5 hours;
B. under the pressure of 600Mpa, suppress;
C. in vacuum degreasing sintered all-in-one oven, be 1300 ℃ of following sintering with temperature, soaking time 2.0 hours;
D. be 1100 ℃ in temperature and quench soaking time 35 minutes down; In temperature is 450 ℃ of following tempering, soaking time 80 minutes.
The powder metallurgy high quality steel material of preparation has good physicals, and hardness (HRC) reaches 55, and bending strength reaches 900MPa, and impelling strength reaches 7Jcm
-2
Embodiment three:
A. be 6.8% Mo powder, 8% W powder, 1.8% C powder and the Fe powder batching of surplus with weight percent, powder size is 150 orders, adds weight percent and is 0.8% Zinic stearas and carry out ball mill mixing again, and mixing time is 2 hours;
B. under the pressure of 560Mpa, suppress;
C. be 1270 ℃ of following sintering in temperature, soaking time 1.5 hours;
D. be 1000 ℃ in temperature and quench soaking time 28 minutes down; In temperature is 550 ℃ of following tempering, soaking time 60 minutes.
The powder metallurgy high quality steel material of preparation has good physicals, and hardness (HRC) reaches 60, and bending strength reaches 845MPa, and impelling strength reaches 6.5Jcm
-2
Claims (3)
1. a powder metallurgy high quality steel preparation methods is characterized in that, may further comprise the steps:
A. be 6～8% Mo powder, 6～8% W powder, 1.8～2% C powder and the Fe powder batching of surplus with weight percent; Powder size is 100～200 orders; Add weight percent and be 0.1～1.0% lubricant and carry out ball mill mixing again, mixing time is 0.5～2 hour;
B. under the pressure of 500～600Mpa, suppress;
C. be 1200～1300 ℃ of following sintering in temperature, soaking time 1.5～2.5 hours;
D. be 950～1100 ℃ in temperature and quench soaking time 20～35 minutes down; In temperature is 450～600 ℃ of following tempering, soaking time 40～80 minutes.
2. according to the powder metallurgy high quality steel preparation methods of claim 1, it is characterized in that said lubricant is a Zinic stearas.
3. according to the powder metallurgy high quality steel preparation methods of claim 1 or 2, it is characterized in that said sintering is in vacuum degreasing sintered all-in-one oven, to carry out.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010105230139A CN102453836A (en) | 2010-10-28 | 2010-10-28 | Method for preparing powder metallurgy high-alloy steel material |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010105230139A CN102453836A (en) | 2010-10-28 | 2010-10-28 | Method for preparing powder metallurgy high-alloy steel material |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN102453836A true CN102453836A (en) | 2012-05-16 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2010105230139A Pending CN102453836A (en) | 2010-10-28 | 2010-10-28 | Method for preparing powder metallurgy high-alloy steel material |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN102453836A (en) |
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2010
- 2010-10-28 CN CN2010105230139A patent/CN102453836A/en active Pending
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| C02 | Deemed withdrawal of patent application after publication (patent law 2001) | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20120516 |