A hot work die steel with high temperature resistance and high toughness and its preparation method

A technology of hot work die steel and high toughness, which is applied in the field of steel forging and heat treatment technology, can solve the problems of increasing the service life of the die, reducing fatigue resistance, and reducing toughness, so as to improve hardenability, reduce thermal fatigue, Tissue even effect

Active Publication Date: 2018-08-14
TIANJIN CISRI HARDER MATERIALS & TECH
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The feature of the present invention is to provide a high-grade hot work die steel with extremely high high temperature strength and toughness and its preparation method, to solve the problem of increased brittleness, Decreased toughness, decreased fatigue resistance and other issues, increasing the service life of the mold

Method used

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  • A hot work die steel with high temperature resistance and high toughness and its preparation method
  • A hot work die steel with high temperature resistance and high toughness and its preparation method
  • A hot work die steel with high temperature resistance and high toughness and its preparation method

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Effect test

Embodiment 1

[0032] A hot work die steel with high temperature resistance and high toughness, composed of the following chemical components in mass percentage: C0.52%, Si1.1%, Mn0.9%, Cr3%, Mo3.5%, V0 .8%, P<0.02%, S<0.0005%, the balance being Fe.

Embodiment 2

[0034] A hot work die steel with high temperature resistance and high toughness, composed of the following chemical components in mass percentage: C 0.51%, Si 0.81%, Mn 0.82%, Cr 2.8%, Mo 3.0%, V 0.7% , Nb 0.2%, Ga 0.05%, P<0.02%, S<0.0005%, and the balance is Fe.

Embodiment 3

[0036] A hot work die steel with high temperature resistance and high toughness, composed of the following chemical components in mass percentage: C0.55%, Si 1.0%, Mn 0.7%, Cr 3%, Mo 3.5%, V 0.9% , Nb 0.24%, Ga 0.05%, Cd0.03%, P<0.02%, S<0.0005%, and the balance is Fe.

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Abstract

The invention relates to high-temperature-resistant and high-toughness hot work die steel and a preparation method thereof. The hot work die steel is mainly composed of, by mass, 0.50-0.65% of C, 0.7-1.3% of Si, 0.6-1.0% of Mn, 2.5-4.5% of Cr, 2.7-4.5% of Mo, 0.5-1.1% of V, 0-0.02% of P, 0-0.0005% of S, and the balance Fe. According to the hot work die steel, the use amounts of all components of H13 die steel are improved, so that the weight percentage of C is increased to 0.50-0.65%, the weight percentage of Mn is increased to 0.6-1.0%, the content of Cr is decreased to 2.5-4.5%, and the weight percentage of Mo is increased to 2.7-4.5%; and the four chemical components are adjusted at the same time, the optimal proportion is achieved, and accordingly the prepared die steel is excellent in hardness and high-temperature resistance and high in toughness.

Description

technical field [0001] The invention belongs to steel forging and heat treatment technology, in particular to a hot work die steel with high temperature resistance and high toughness and its manufacturing method. Background technique [0002] Processing and forming parts with molds has a series of advantages such as high production efficiency, good quality, material saving and low cost, and has a wide range of applications. Hot forging die steel is an important type of die material. Since hot forging is in contact with the metal blank at 1000°C for a long time, it bears huge extrusion force, stamping force, bending force, friction force and thermal shock alternating stress, etc. Complex action, which requires hot forging die steel to have good strength and toughness, cold and heat fatigue and high temperature thermal stability. [0003] H13 is one of the most commonly used hot forging die steels. It was first developed by the United States in the second half of the last cen...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22C38/02C22C38/04C22C38/12C22C38/18C21D8/00C22B9/18
CPCC21D8/005C22B9/18C22C38/002C22C38/02C22C38/04C22C38/12C22C38/18
Inventor 王飞
Owner TIANJIN CISRI HARDER MATERIALS & TECH
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