CN105296842A - Low-cobalt tool alloy steel - Google Patents
Low-cobalt tool alloy steel Download PDFInfo
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- CN105296842A CN105296842A CN201510858101.7A CN201510858101A CN105296842A CN 105296842 A CN105296842 A CN 105296842A CN 201510858101 A CN201510858101 A CN 201510858101A CN 105296842 A CN105296842 A CN 105296842A
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Abstract
The invention discloses low-cobalt tool alloy steel. The low-cobalt tool alloy steel is characterized in that in a steel ingot solidification process, no cobalt is contained, and after quenching and tempering are carried out, cobalt-free high-speed steel with hardness capable of reaching about H van can be obtained; after being subjected to low temperature and low carbon potential diagnosis and low-temperature quenching treatment, the low-cobalt tool alloy steel has a surface-layer carbon content close to balanced carbon t. The low-cobalt tool alloy steel has the beneficial effect of improving cold-heat processing performance of the alloy tool steel.
Description
Technical field
What the present invention relates to is a kind of steel, specifically a kind of superhard rapid steel.
Background technology
Containing cobalt HSS-like, there is excellent superhard, red hardness, grindability, domesticly also to produce already, but due to problems such as its hot-workability is poor, processing performance is bad, oxidizable de-C, make the rate of steel products produced to steel ingots and cutter yield rate very low, especially containing cobalt amount more than 5%, cobalt is strategic short goods and materials, current current price 440,000 yuan/ton, high price is expensive, causes steel product cost high, price is expensive, is difficult to apply.
Summary of the invention
The invention provides a kind of low cobalt Tool Alloy steel of a kind of novel high speed steel.A kind of low cobalt Tool Alloy steel, in During Ingot Solidification containing cobalt through temper number of quenching can reach all left and right of H without Cobalt High Speed Steel.
Described cobalt superhard high speed steel through lowly to prevent, low carbon potential examine refer to low prevent quench treatment after case carbon close to balance carbon t, the hardness after tempering of quenching all more than H 67, is progressively reduced to centre hardness in the thickness of 1.5 ~ left and right.
Its carbon of described cobalt superhard high speed steel contains t lower than the carbon content in high speed inscription state graph corresponding to r+M, c phase region summit, but must not obtain enough necessary carbon saturation A of centre hardness lower than for ensureing.
Described one low cobalt Tool Alloy steel technique is (low temperature, low carbon potential are examined carbon, lowly prevented quenching), examine carbon degree of preventing between 750 ~ 800 DEG C, carburizing medium carbon potential is at about 0.5-0.9%, carburizing can be gas cementation also can be solid carburizing or vacuum carburization, after examining carbon, make case carbon bring up to balance carbon amounts. carry out the low temperature quenching of about 1180 DEG C after carburizing.This technique is be exclusively used in the thermal treatment process without Cobalt High Speed Steel.
The composition of described a kind of low cobalt Tool Alloy steel reaches C1, Cr4, W6, Mo5, V2,5.1wt%.
Feature of the present invention is that this HSS-like does not exist carbide segregation and thick carbide that obdurability is declined.
The alloying element content of this HSS-like is substantially identical with general rapid steel, its carbon content .ll is down to and does not form Lai Shi eutectic when ingot solidification, and reach V1, Cr4, W6, Mo5, V25.1wt% by the composition changing steel, but after tempering of quenching, can ensure again that there is enough hardness (about HRc55) and the level of intensity, thus carbide segregation and thick carbide can be eliminated.This kind of steel again through low temperature, low carbon potential carburizing and low temperature quenching, makes case carbon reach balance carbon after roughing is shaping, and hardness can more than HRc67, thus obtains superhard top layer and carbides-free segregation, tough heart portion without thick carbide.
Embodiment
Embodiment 1
Novel high speed steel-a kind of low cobalt Tool Alloy steel.A kind of low cobalt Tool Alloy steel, in During Ingot Solidification containing cobalt and through temper number of quenching can reach all left and right of H without Cobalt High Speed Steel, prevent through low, low carbon potential examine refer to low prevent quench treatment after case carbon close to balance carbon t, to quench the hardness all more than H 67 after tempering, progressively centre hardness is reduced in the thickness of 1.5 ~ left and right, its carbon contains t lower than r+M in high speed inscription state graph, carbon content corresponding to c phase region summit, but enough necessary carbon saturation A of centre hardness must not be obtained lower than for ensureing, technique is (low temperature, low carbon potential examines carbon, lowly prevent quenching), examine carbon degree of preventing between 750 ~ 800 DEG C, carburizing medium carbon potential is at about 0.5-0.9%, carburizing can be gas cementation also can be solid carburizing or vacuum carburization, after examining carbon, make case carbon bring up to balance carbon amounts. carry out the low temperature quenching of about 1180 DEG C after carburizing.This technique is be exclusively used in the thermal treatment process without Cobalt High Speed Steel, and composition reaches C1, Cr4, W6, Mo5, V2,5.1wt%.The foregoing is only the preferred embodiments of the present invention, be not limited to the present invention, for a person skilled in the art, the present invention can have various modifications and variations.Within the spirit and principles in the present invention all, any amendment done, equivalent replacement, improvement etc., all should be included within protection scope of the present invention.
Claims (4)
1. a low cobalt Tool Alloy steel, is characterized in that, in During Ingot Solidification containing cobalt and through temper number of quenching can reach all left and right of H without Cobalt High Speed Steel; Described one low cobalt Tool Alloy steel through lowly to prevent, low carbon potential examine refer to low prevent quench treatment after case carbon close to balance carbon t.
2. one according to claim 1 low cobalt Tool Alloy steel, is characterized in that, described without the superhard carbon of cobalt containing t lower than the carbon content corresponding to r+M, c phase region summit at a high speed inscription state graph.
3. one according to claim 1 low cobalt Tool Alloy steel, is characterized in that, described one low cobalt Tool Alloy steel technique is for examining carbon degree of preventing between 750 ~ 800 DEG C, and carburizing medium carbon potential is at about 0.5-0.9%.
4. one according to claim 1 low cobalt Tool Alloy steel, is characterized in that, the composition of described a kind of low cobalt Tool Alloy steel reaches C1, Cr4, W6, Mo5, V2,5.1wt%.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510858101.7A CN105296842A (en) | 2015-11-30 | 2015-11-30 | Low-cobalt tool alloy steel |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510858101.7A CN105296842A (en) | 2015-11-30 | 2015-11-30 | Low-cobalt tool alloy steel |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN105296842A true CN105296842A (en) | 2016-02-03 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201510858101.7A Pending CN105296842A (en) | 2015-11-30 | 2015-11-30 | Low-cobalt tool alloy steel |
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| CN (1) | CN105296842A (en) |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2004169177A (en) * | 2002-11-06 | 2004-06-17 | Daido Steel Co Ltd | Alloy tool steel, its manufacturing method, and die using it |
| CN103266265A (en) * | 2013-05-24 | 2013-08-28 | 大连经济技术开发区圣洁真空技术开发有限公司 | Co-free superhard high speed steel |
| CN104099513A (en) * | 2013-04-03 | 2014-10-15 | 丹阳市协昌合金有限公司 | Cobalt-free multielement high-speed tool steel and manufacturing method |
-
2015
- 2015-11-30 CN CN201510858101.7A patent/CN105296842A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2004169177A (en) * | 2002-11-06 | 2004-06-17 | Daido Steel Co Ltd | Alloy tool steel, its manufacturing method, and die using it |
| CN104099513A (en) * | 2013-04-03 | 2014-10-15 | 丹阳市协昌合金有限公司 | Cobalt-free multielement high-speed tool steel and manufacturing method |
| CN103266265A (en) * | 2013-05-24 | 2013-08-28 | 大连经济技术开发区圣洁真空技术开发有限公司 | Co-free superhard high speed steel |
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| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20160203 |
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| WD01 | Invention patent application deemed withdrawn after publication |