High-wear resistance cold work die steel and production method thereof

A cold work die steel, high wear resistance technology, applied in the direction of manufacturing converters, etc., can solve the problem of high cutting performance requirements, achieve the effects of good cutting performance, simple production process and low production cost

Inactive Publication Date: 2020-03-06
大冶佳康安科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Because cold work die steel has high requirements on cutting performance when making various tools, it is difficult for existing die steel to meet the above cutting performance requirements. Therefore, it is important to develop a kind of high wear resistance cold work die steel and its production method. Important Contents of Invention Research

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0020] A high wear resistance cold working die steel in this embodiment, its chemical composition and mass percentage content are: C 12.2%, Si 0.17%, Mn 0.59%, P 0.0044%, S 0.0039%, Cr 0.47%, Ni 0.006%, W 0.002%, V 0.004%, Mo 0.005%, the rest is Fe and unavoidable impurities.

[0021] A kind of preparation method of high wear resistance cold work die steel of the present embodiment comprises the following steps:

[0022] (1) Add molten iron into the molten iron tank, carry out deep desulfurization pretreatment on the molten iron with a desulfurizing agent, and then enter the top-bottom combined blowing converter for smelting, add a dephosphorizing agent to reduce the phosphorus content in the molten iron to P 0.0044%, and then enter refining Add desulfurizer to the furnace to make the sulfur content in the molten iron S 0.0039%, add alloy materials SiFe, MnFe, CrFe to adjust the Si content in the molten iron to 0.17%, the Mn content to 0.59%, and the Cr content to 0.47%. 3 ti...

Embodiment 2

[0030] A high wear resistance cold work die steel in this embodiment is characterized in that its chemical composition and mass percentage content are: C 0.085%, Si 0.17%, Mn 0.59%, P 0.0067%, S 0.0042%, Cr 12.3%, Ni 0.007%, W 0.001%, V0.005%, Mo 0.006%, the rest is Fe and unavoidable impurities.

[0031] A kind of preparation method of high wear resistance cold work die steel of the present embodiment comprises the following steps:

[0032] (1) Add molten iron into the molten iron tank, carry out deep desulfurization pretreatment on the molten iron with a desulfurizer, and then enter into the top-bottom combined blowing converter for smelting, add dephosphorization agent to reduce the phosphorus content in the molten iron to P≤0.0067%, and then enter Add desulfurizer to the refining furnace to make the sulfur content in the molten iron S 0.0042%, add alloy materials SiFe, MnFe, CrFe to adjust the Si content in the molten iron to 0.17%, the Mn content to 0.59%, and the Cr cont...

Embodiment 3

[0040] A high wear resistance cold work die steel in this embodiment is characterized in that its chemical composition and mass percentage content are: C 0.10%, Si 0.15%, Mn 0.53%, P 0.008%, S 0.0056%, Cr 13.2%, Ni 0.005%, W 0.003%, V0.002%, Mo 0.005%, the rest is Fe and unavoidable impurities.

[0041] A kind of preparation method of high wear resistance cold work die steel of the present embodiment comprises the following steps:

[0042] (1) Add molten iron into the molten iron tank, conduct deep desulfurization pretreatment on the molten iron with a desulfurizer, and then enter the top-bottom combined blowing converter for smelting, add dephosphorization agent to reduce the phosphorus content in the molten iron to P 0.008%, and then enter refining Add desulfurizer to the furnace to make the sulfur content in the molten iron S 0.0056%, add alloy materials SiFe, MnFe, CrFe to adjust the content of Si in the molten iron to 0.15%, the content of Mn to 0.53%, and the content of ...

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Abstract

The invention discloses high-wear resistance cold work die steel and a production method thereof. The high-wear resistance cold work die steel comprises chemical compositions including, by mass, 0.078% to 0.10% of C, 0.15% to 0.20% of Si, 0.52%-0.68% of Mn, not larger than 0.008% of P, not larger than 0.006% of S, 11.2% to 13.5% of Cr, 0.005% to 0.008% of Ni, 0.001% to 0.003% of W, 0.002%-0.005% of V, 0.003%-0.007% of Mo and the balance Fe and unavoidable impurities. During preparation, molten iron is firstly smelted and subjected to impurity removal, then the molten iron is forged to form a billet, and then rolling is carried out. The cold work die steel has the good cutting performance and can meet the cutting performance of a machine tool; and as the strength is high, fractures caused by brittleness are avoided, the service life of the machine tool is prolonged, and the cutting accuracy is high.

Description

technical field [0001] The invention relates to the technical field of steelmaking, in particular to a high wear resistance cold working die steel and a production method thereof. Background technique [0002] When the cold working die is working, due to many times of friction between the surface and the blank, the die must still maintain a low surface roughness value and high dimensional accuracy in this case to prevent early failure. Since the hardness and structure of the mold material are important factors affecting the wear resistance of the mold, in order to improve the wear resistance of the cold-working mold, it is usually required that the hardness of the mold is 30% to 50% higher than that of the workpiece, and the structure of the material is tempered. Nitenite or lower bainite, on which uniform, fine granular carbides are distributed. [0003] The process performance of cold work die steel is directly related to the manufacturing cycle and manufacturing cost of ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C38/46C22C38/44C22C38/04C22C38/02C22C33/04C21C5/35C21C7/064C21D8/02
CPCC21C5/35C21C7/0645C21D8/0205C21D8/0247C22C33/04C22C38/002C22C38/02C22C38/04C22C38/44C22C38/46
Inventor 余祥
Owner 大冶佳康安科技有限公司
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