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Anti-oxidation hot work mold steel and preparation method thereof

A hot work die steel, anti-oxidation technology, applied in the field of metal materials, can solve the problems of poor anti-oxidation and thermal fatigue resistance, low high temperature strength, and reduced service life of molds

Active Publication Date: 2019-05-10
UNIV OF SCI & TECH BEIJING
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  • Application Information

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Problems solved by technology

When using these die steel materials to manufacture hot forging dies, die-casting dies and hot extrusion dies, due to low high-temperature strength, poor oxidation resistance and thermal fatigue resistance, oxidation and deformation occur during use, and heat appears on the inner surface of the cavity. Fatigue cracks (cracks), not only reduce the service life of the mold, but also reduce the surface quality of the molded parts

Method used

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  • Anti-oxidation hot work mold steel and preparation method thereof
  • Anti-oxidation hot work mold steel and preparation method thereof
  • Anti-oxidation hot work mold steel and preparation method thereof

Examples

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Embodiment 1

[0035] Example 1 Invented steel was quenched at 1100°C and tempered at 600°C, and the tensile properties at high temperature from room temperature to 700°C at high temperature were tested as follows: figure 1shown. The temperature tensile properties of Examples 2, 3, and 4 are similar, so they are not repeated. For comparison, the high-temperature transient tensile performance data of H13 steel and 3Cr2W8V steel are added in the figure. The data of H13 steel is taken from the literature [Zhu Zongyuan, my country’s Hot Work Die Steel Performance Dataset (Continued XI), Mechanical Engineering Materials, 2001, Volume 25, No. 12, Page 36-40], and the data of 3Cr2W8V steel is taken from the literature [Zhu Zongyuan, Chinese Hot Work Die Steel Properties Dataset (Continuation VII), Mechanical Engineering Materials, 2001, Vol. 25, No. 8, pp. 38-42]. from figure 1 It can be seen that the steel of the present invention has good thermal strength, and is not easy to degrade the structu...

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Abstract

The invention provides anti-oxidation hot work mold steel and a preparation method thereof. The anti-oxidation hot work mold steel is characterized by comprising the following components in percentageby mass: 0.15-0.30% of C, 10-13% of Cr, 1.0-2.5% of Ni, 1.5-3.0% of Mo, 0.5-1.5% of Co, Si below 0.8%, Mn below 0.8%, W below 1%, V below 0.9%, Nb below 0.3%, and the balance of Fe and inevitable micro impurities in the steel. The steel is better than H13 steel and 3Cr2W8V steel in high-temperature strength above 600 DEG C, achieves excellent heat fatigue resistance, and is prominently better than such traditional hot work mold steel as H13 in corrosion resistance and oxidation resistance.

Description

technical field [0001] The invention relates to an alloy steel, in particular to an oxidation-resistant hot work die steel and a preparation method thereof, belonging to the field of metal materials. Background technique [0002] Mold is the basic process equipment for industrial production. In machinery, national defense, metallurgy, light industry, electronics and other industrial sectors, quite a few parts are formed by molds. In the manufacturing industry, molds ensure high-product, high-efficiency production and reduce production costs. The mold industry occupies an important position in the national economy. Mold technology has become an important symbol to measure a country's product manufacturing level, and the continuous expansion of mold application fields puts forward more and higher requirements for molds. According to the service conditions of the mold, the mold steel can be divided into four categories, including cold work mold steel, hot work mold steel, pla...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C38/52C22C38/48C22C38/46C22C38/44C22C38/04C22C38/02C21D1/26C21D1/28C21D1/18
Inventor 连勇黄进峰张津
Owner UNIV OF SCI & TECH BEIJING
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