Alloy tool steel and production method thereof

A technology of alloy tool steel and production method, applied in the field of tool steel, can solve the problems of narrow application range, low hardness and reduced toughness, and achieve the effect of wide application range, high hardness and excellent toughness

Inactive Publication Date: 2015-12-23
NINGBO DEKE PRECISION MOLDING +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

When the carbon content in the alloy tool steel is medium, that is, when the mass fraction of carbon is 0.35%-0.70%, the alloy tool steel has good toughness, but the hardness is slightly lower, HRC50-55, and it is mostly used in the manufacture of hot work molds. The scope of application is narrow. If the hardness of alloy tool steel is increased, its toughness will be reduced and the overall performance will be poor.

Method used

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Embodiment Construction

[0024] Below in conjunction with embodiment the present invention is further described.

[0025] A kind of alloy tool steel provided by the invention, this steel has following chemical composition and mass percentage:

[0026] C0.5%, Si0.2%, Mn0.5%, Cr5.0%, Mo2.3%, V0.5%, S≤0.003%, P≤0.02%, Fe balance.

[0027] The production method of the alloy tool steel is as follows:

[0028] (1), batching is carried out according to the chemical composition and mass percentage of the above-mentioned tool steel, and then melted and poured into electrode rods in a vacuum induction furnace;

[0029] (2) Using the above-mentioned smelting and pouring electrode rods as consumable electrodes in the process of electroslag remelting, controlling solidification to finally form high-quality uniform steel ingots;

[0030] (3) The remelted steel ingots are rolled or forged into blocks or bars;

[0031] (4), carry out heat treatment to block material or bar material to obtain tool steel;

[0032] ...

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Abstract

The invention discloses an alloy tool steel and a production method thereof. The steel comprises the following chemical components in percentage by mass: 0.5% of C, 0.2% of Si, 0.5% of Mn, 5.0% of Cr, 2.3% of Mo, 0.5% of V, at most 0.003% of S, at most 0.02% of P and the balance of Fe. The hardness of the alloy tool steel is HRC56-58. Compared with the existing alloy tool steel, the alloy tool steel disclosed by the invention has the advantages of higher hardness, excellent toughness, excellent ductility, excellent wear resistance, excellent hardenability and excellent heat treatment dimensional stability, can be used for producing hot-working molds, can also be used for producing cold working molds and engineering steel, and thus, has wider application range.

Description

technical field [0001] The invention relates to a tool steel, in particular to an alloy tool steel and a production method thereof. Background technique [0002] Alloy tool steel is a type of steel that adds chromium, molybdenum, tungsten, vanadium and other alloying elements to improve hardenability, toughness, wear resistance and heat resistance on the basis of carbon tool steel. It is mainly used in the manufacture of measuring tools, cutting tools, impact-resistant tools, cold and hot molds and some special-purpose tools. When the carbon content in the alloy tool steel is medium, that is, when the mass fraction of carbon is 0.35%-0.70%, the alloy tool steel has good toughness, but the hardness is slightly lower, HRC50-55, and it is mostly used in the manufacture of hot work molds. The scope of application is narrow. If the hardness of alloy tool steel is increased, its toughness will be reduced and the overall performance will be poor. Contents of the invention [00...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C38/24C22B9/18C21D8/00C21D1/30C21D1/32C21D1/18
CPCY02P10/25
Inventor 吕贵平邹修群王志君刘长东赵会民霍文强
Owner NINGBO DEKE PRECISION MOLDING
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