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High heat-intensity hot-work die steel material

A hot work die steel, high heat technology, applied in the direction of manufacturing tools, heat treatment equipment, heat treatment process control, etc., can solve the application field limitations, poor thermal fatigue resistance, limited life and other problems, to improve the structure and composition, Excellent thermal fatigue performance, reducing the effect of component segregation

Active Publication Date: 2007-03-07
SHANGHAI UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although 3Cr2W8V alloy steel also has good thermal hardness, its thermal fatigue resistance is poor, and the mold often fails early due to cracks, which seriously limits its service life.
[0004] In view of this, many scientific researchers at home and abroad are committed to the research of new high-heat-strength hot-work die steels. Although many new steel types have been developed, and there are many steel types with excellent performance, most of them are aimed at A certain aspect of the problem was born, and the application field has certain limitations

Method used

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  • High heat-intensity hot-work die steel material

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Embodiment 1

[0038] In the present embodiment, the composition and weight percentage of the die steel that adopts are as follows:

[0039] Cr 3.64%

[0040] Mo 2.32%

[0041] V 1.29%

[0042] W 1.29%

[0043] Mn 0.36%

[0044] Ni 0.15%

[0045] C 0.32%

[0046] Si 0.27%

[0047] S 0.002%

[0048] P 0.01%

[0049] Fe balance

[0050] Process and steps in the present embodiment are as follows:

[0051] (1) Melting: smelting according to the traditional conventional method, placing the batch material according to the above formula in an intermediate frequency induction furnace, and smelting at a temperature above 1500°C; then casting the ingot, and entering the next step for use;

[0052] (2) Electroslag remelting: use electric current to generate resistance heat through the electroslag layer to melt the alloy base material of the consumable electrode. The liquid metal falls in the form of molten droplets through the slag layer into the metal molten pool in the water-cooled crystall...

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Abstract

The invention discloses a heat mould steel material in the alloy steel material manufacturing technological domain, which comprises the following parts: 3.5-4.0%Cr, 2.0-2.5% Mo, 1.0-1.5% V,1.0-1.5% W , 0.1-0.5% Mn, 0.1-0.25% Ni, 0.3-0.35% C, 0.1-0.5% Si, 0.005-0.01% S, 0.01-0.02% P and Fe. The preparing method comprises the following steps: (1) fusing; (2) refusing electric slag; (3) evening at high temperature; (4) forging; (5) annealing; (6) forging blank; (7) annealing to obtain the product with hardness between 48-54HRC and impaction flexibility more than 300J.

Description

technical field [0001] The invention relates to a hot work die steel material, which belongs to the technical field of alloy steel material manufacturing technology. Background technique [0002] Hot work die steel generally operates under quite complex working conditions, and the performance requirements for die steel materials are also quite strict. When working, the material bears a great impact force. After the mold cavity is in contact with the high-temperature metal, the temperature itself often reaches 300-400°C, and the local temperature can reach 500-700°C, and some even reach about 1000°C. Heating and cooling. In the state of sometimes cold and sometimes hot, it is easy to cause thermal fatigue cracks on the working surface of the mold, that is, cracks; when the hot metal is forced to deform, it will rub against the surface of the mold cavity, and the mold is easily worn and its hardness is reduced; the mold is at high temperature. Mechanical stress cycles can al...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C38/44C22C33/04C21D8/00C21D11/00B21J1/06
Inventor 吴晓春闵永安陈建亭汪宏斌
Owner SHANGHAI UNIV
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