High chromium ledeburite cold work die steel with high tenacity and high abrasive resistance and preparation method thereof

A cold work die steel, high wear resistance technology, applied in the field of cold work die steel manufacturing, can solve the problems of fracture, carbide segregation, low toughness, etc., to reduce the cost of use, improve die toughness and wear resistance, comprehensive performance excellent effect

Active Publication Date: 2014-05-07
SHANXI BUYEASY MACHINERY MFG
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] In order to solve the problem that the existing D2 cold work die steel is prone to serious carbide segregation, resulting in low

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0013] High toughness, high wear resistance and high chromium ledeburite cold work die steel, which is composed of the following raw materials in mass percentage, C 1.40%; Si 0.01%; Mn 0.01%; S 0.01%; P 0.01%; Cr 8%; Mo 0.70 %; V 0.20%; Nb 0.005%; RE 0.003%; Ni 0.01%; Cu 0.01%; the rest is Fe and impurities.

[0014] The internal structure of the high toughness, high wear resistance and high chromium ledeburite cold work die steel is fine flaky martensite with an average length of about 30 microns and an average width of about 0.5 microns.

[0015] The preparation method of high toughness, high wear resistance and high chromium ledeburite cold working die steel adopts the following steps: a. Add scrap steel raw materials into an electric arc furnace for melting, the melting temperature is 1500°C, add raw materials and deoxidizer during the melting process, and then pass Ladle refining furnace and vacuum degassing furnace for secondary refining; b. Preheat the steel ingot mold ...

Embodiment 2

[0018] High toughness, high wear resistance and high chromium ledeburite cold work die steel, characterized in that: it is composed of the following raw materials in mass percentage, C 1.65%; Si 0.60%; Mn 0.60%; S 0.020%; P 0.020%; Cr 13.00 %; Mo 1.20%; V 1.00%; Nb 0.20%; RE 0.02%; Ni 0.25%; Cu 0.30%; the rest is Fe and impurities.

[0019] The internal structure of the high toughness, high wear resistance and high chromium ledeburite cold work die steel is fine flaky martensite with an average length of about 30 microns and an average width of about 0.4 microns.

[0020] The preparation method of the high toughness, high wear resistance and high chromium ledeburite cold working die steel adopts the following steps: a. Put scrap steel raw materials into the electric arc furnace for melting, the melting temperature is 1600°C, add raw materials and deoxidizer during the melting process, and then pass Ladle refining furnace and vacuum degassing furnace for secondary refining; b. ...

Embodiment 3

[0023] High toughness, high wear resistance and high chromium ledeburite cold work die steel, characterized in that: it is composed of the following raw materials in mass percentage, C 1.55%; Si 0.37%; Mn 0.45%; S≤0.013%; P≤0.015%; Cr 11.8%; Mo 0.98%; V 0.87%; Nb 0.11%; RE 0.009%; Ni 0.18%; Cu 0.21%; the rest is Fe and impurities.

[0024] The internal structure of the high toughness, high wear resistance and high chromium ledeburite cold work die steel is fine flaky martensite with an average length of about 25 microns and an average width of about 0.4 microns.

[0025]The preparation method of the high toughness, high wear resistance and high chromium ledeburite cold working die steel adopts the following steps: a. Put the scrap steel raw material into the electric arc furnace for melting, the melting temperature is 1585°C, add the raw material and deoxidizer during the melting process, and then pass Ladle refining furnace and vacuum degassing furnace for secondary refining;...

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Abstract

The invention particularly discloses high chromium ledeburite cold work die steel with high tenacity and high abrasive resistance, and a preparation method thereof. The problems that the existing D2 cold work die steel easily generates serious carbide segregation so as to result in low tenacity, small gaps and raptures are solved. The high chromium ledeburite cold work die steel with high tenacity and high abrasive resistance is prepared from the following raw materials by mass percent: 1.40-1.65% of C, no more than 0.60% of Si, no more than 0.60% of Mn, no more than 0.020% of S, no more than 0.020% of P, 8-13.00% of Cr, 0.70-1.20% of Mo, 0.20-1.00% of V, 0.005-0.20% of Nb, 0.003-0.02% of RE, no more than 0.25% of Ni, no more than 0.30% of Cu, and the balance of Fe and impurities. The high chromium ledeburite cold work die steel is excellent in overall performance, and can replace cold work die steel such as Cr12MoV, D2 steel and the like, the tenacity and the abrasive resistance of the die are improved, and the service life is greatly prolonged. Thus, the use cost is reduced, the usable range is expanded, and the problems of poor tenacity, tipping or rapture, low wear resistance and the like in special service environments such as large impact load, high work speed, high accuracy, long service life and the like can be effectively solved.

Description

technical field [0001] The invention relates to the field of cold-work die steel manufacturing, in particular to a high-toughness, high-wear resistance, high-chromium ledeburite cold-work die steel and a preparation method thereof. Background technique [0002] D2 steel is a high carbon and high chromium ledeburite cold work die steel, which can be hardened by air cooling. It is a steel number in the American ASTM A681-94 "Technical Conditions of Alloy Tool Steel". Steel is more than twice as tall. Therefore, when D2 steel is introduced in GB1299-85, it is legally designated as Cr12Mo1V1 according to the steel grade in my country. [0003] D2 steel is an international general-purpose cold work die steel, and almost all developed industrial countries have incorporated it into their own national standards, such as: BD2 steel in British BS4659; SKD11 steel in Japanese JIS4404; X155CrVMo12l in German DIN17350 Steel; Z160CDV12 steel in French A35-580. Its characteristics are:...

Claims

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Application Information

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IPC IPC(8): C22C38/48C22C38/26C22C33/04
Inventor 杜晓强刘瑞明杨旭东王钰张玉力刘国庆李保平尹鸿翔
Owner SHANXI BUYEASY MACHINERY MFG
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