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High wear-resistant hot-stamping die steel and manufacturing method thereof

A technology of hot stamping die and manufacturing method, which is applied in the field of metallurgical products and its manufacturing, can solve problems such as steel deformation, high thermal stress, cracking, etc., and achieve the effects of reducing manufacturing production costs and adding fewer types of alloys

Inactive Publication Date: 2015-01-28
BAOSHAN IRON & STEEL CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] It is generally believed that low thermal conductivity will generate high thermal stress, which will easily cause deformation and cracking of steel

Method used

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  • High wear-resistant hot-stamping die steel and manufacturing method thereof
  • High wear-resistant hot-stamping die steel and manufacturing method thereof
  • High wear-resistant hot-stamping die steel and manufacturing method thereof

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Effect test

Embodiment A1-A5

[0052] Manufacture the high wear-resistant hot stamping die steel in embodiment A1-A5 according to the following steps:

[0053] 1) Electric furnace smelting: the ingredients are placed in an electric furnace and smelted at a temperature above 1500° C.; then poured into steel ingots for use, and the mass percentage distribution of each chemical element in the control examples A1-A5 is shown in Table 1;

[0054] 2) Electroslag remelting: reduce the content of gas and inclusions, and obtain steel ingots with uniform composition, compact structure and high quality;

[0055] 3) One-time annealing: the annealing temperature is 700-800°C, the holding time is 8-10 hours and then cooled with the furnace;

[0056]4) Homogenization at high temperature: heat the steel ingot to 1235-1250°C and keep it warm for 8-12 hours to homogenize the components in the steel, prevent component segregation, improve the solidification structure of the material, and then place it in the air to cool;

[...

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Abstract

The invention discloses a high wear-resistant hot-stamping die steel and a manufacturing method thereof. The high wear-resistant hot-stamping die steel is prepared from the following chemical elements in percentage by weight: 0.4-0.6 percent of C, less than 0.40 percent of Si, less than 0.40 percent of Mn, 1.5-2.0 percent of W, 3.0-4.0 percent of Mo, less than 0.50 percent of Cr, 3.0-4.0 percent of V and the balance of Fe and other inevitable impurities. The invention also discloses the manufacturing method of the high wear-resistant hot-stamping die steel. The manufacturing method comprises the following steps: electric furnace smelting, electroslag remelting, primary annealing, high-temperature homogenizing, forging, secondary annealing and heat treatment, wherein in the heat treatment step, quenching is carried out at temperature of 1060-1100 DEG C and tempering is carried out at temperature of 560-620 DEG C. the high wear-resistant hot-stamping die steel is high in heat conductivity, strong in rigidity and strength, excellent in impact toughness and wear resistance and good in machinability, thermal fatigue resistance and temper resistance stability.

Description

technical field [0001] The invention relates to a metallurgical product and a manufacturing method thereof, in particular to a hot stamping die steel and a manufacturing method thereof. Background technique [0002] Usually, the quality level of die steel can objectively measure the manufacturing level of a country. According to different service conditions, the manufacturing industry roughly divides die steel into three categories: hot work die steel, cold work die steel and plastic die steel. With the rapid development of the modern automobile industry, the demand for automobiles around the world is also rising. At present, in the production and processing of auto parts, hot stamping die steel occupies a large proportion, which is one of the categories of hot work die steel. Different from the cold stamping process, the hot stamping forming process effectively utilizes the plasticity, increased ductility, and reduced yield strength of metals at high temperatures to form ...

Claims

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Application Information

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IPC IPC(8): C22C38/12C22C38/24C21D1/18
CPCC22C38/12C21D1/18C22C38/18
Inventor 罗爱辉徐伟力洪振军吴彦骏郭瑞泉王晨磊
Owner BAOSHAN IRON & STEEL CO LTD
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