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A kind of hot work die steel and preparation method thereof

A technology of hot work die steel and content, applied in the field of new materials, can solve the problems of low heat treatment deformation rate, low section shrinkage rate, low tensile strength, etc., achieve comprehensive mechanical properties enhancement, improve thermal fatigue resistance, tensile strength improved effect

Active Publication Date: 2020-12-04
HENAN UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, H13 steel has the following disadvantages: low heat treatment deformation rate, low section shrinkage rate, low tensile strength, and rapid decrease in hardness when the service temperature is higher than 540 °C
Therefore, the hot work mold prepared by using H13 steel will have plastic deformation, cracking, bluntness, washboard pattern and thermal wear during use.

Method used

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  • A kind of hot work die steel and preparation method thereof

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Embodiment 1

[0028] The hot work die steel of this embodiment is composed of the following constituent elements: carbon 0.397wt%, silicon 1.03wt%, manganese 0.514wt%, molybdenum 1.59wt%, chromium 4.94wt%, vanadium 1.04wt%, titanium 0.044wt% , the balance is iron and unavoidable impurities.

Embodiment 2

[0030] The hot work die steel of this embodiment is composed of the following constituent elements: carbon 0.396wt%, silicon 0.975wt%, manganese 0.427wt%, molybdenum 1.55wt%, chromium 5.10wt%, vanadium 0.984wt%, titanium 0.127wt% , the balance is iron and unavoidable impurities.

[0031] Preparation method embodiment 1 of hot work die steel of the present invention

[0032] The preparation method of the hot work die steel of the present embodiment comprises the following steps:

[0033] (1) The hot work die steel is composed of the following constituent elements: carbon 0.397wt%, silicon 1.03wt%, manganese 0.514wt%, molybdenum 1.59wt%, chromium 4.94wt%, vanadium 1.04wt%, titanium 0.044wt% , the balance is iron and unavoidable impurities; according to the weight percentage of each constituent element in the hot work die steel, the raw materials are industrial pure iron rods, industrial silicon bars, electrolytic manganese, industrial molybdenum bars, metal chromium, vanadium i...

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Abstract

The invention discloses hot work die steel and a preparation method thereof. The hot work die steel is composed of the following constituent elements including, by weight, 0.396%-0.397% of carbon, 0.975%-1.03% of silicon, 0. 427%-0.514% of manganese, 1.55%-1.59% of molybdenum, 4.94%-5.10% of chromium, 0.984%-1.04% of vanadium, 0.044%-0.127% of titanium and the balance iron and inevitable impurities. According to the hot work die steel, the Ti element is added on the basis of H13 steel compositions; on one hand, the effects of controlling the grain size, preventing excessive growth of grains and increasing precipitation strengthening and fine grain strengthening are achieved, and the strength and hardness of the steel are improved; and on the other hand, the titanium reacts with the carbonto generate titanium carbide, the advantages of high hardness and good thermal stability are achieved, the effect of precipitation strengthening is achieved, and micro Ti alloying is formed. The roomtemperature Rockwell hardness, room temperature tensile strength, room temperature tensile section shrinkage, the high-temperature tensile section shrinkage rate and the high-temperature tensile strength of the hot work die steel are significantly improved, and the comprehensive mechanical properties are obviously enhanced.

Description

technical field [0001] The application relates to the technical field of new materials, in particular to a hot work die steel and a preparation method thereof. Background technique [0002] Hot working dies are tooling used to make heated metal or liquid metal into desired products, such as hot forging dies, hot heading dies, hot extrusion dies, die-casting dies and high-speed forming dies, etc. All kinds of hot working dies are Working at higher temperatures, especially in hot extrusion of steel and die casting of steel, the temperature of steel is in the range of 1200-1500 °C, so the most important performance requirement for hot work die steel is the heat resistance of steel Sex, followed by toughness and thermal fatigue resistance. The various mold steels used in hot work molds are collectively referred to as hot work mold steels. [0003] H13 steel is a commonly used steel for hot work die steel. It is mainly used in die casting dies, hot forging dies, and hot extrusi...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22C38/02C22C38/04C22C38/22C22C38/24C22C38/28B22D17/14C21D8/00C22C33/06
CPCB22D17/14C21D8/005C22C33/06C22C38/02C22C38/04C22C38/22C22C38/24C22C38/28
Inventor 张彦敏王永健王要利韩文奎张帅帅周延军国秀花宋克兴赵培峰郜建新刘亚民
Owner HENAN UNIV OF SCI & TECH
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