High-toughness plastic die steel and production method thereof

A technology of plastic mold steel and production method, applied in the field of mold steel, can solve the problems of practical use performance limitation, large fluctuation of hardness in the thickness direction and difficult to cut, etc., and achieve the effect of obvious easy cutting effect, high hardness uniformity and stable performance.

Inactive Publication Date: 2018-04-13
莫祖勇
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] The technical problem to be solved by the present invention is to provide a high-toughness plastic mold steel and its production method, which solves

Method used

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[0011] The principles and features of the present invention are described below, and the examples are only used to explain the present invention, but not to limit the scope of the present invention.

[0012] In the description of the present invention, it should be noted that the terms "installed", "connected" and "connected" should be understood in a broad sense, unless otherwise expressly specified and limited, for example, it may be a fixed connection or a detachable connection Connection, or integral connection; can be mechanical connection, can also be electrical connection; can be directly connected, can also be indirectly connected through an intermediate medium, can be internal communication between two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood in specific situations.

[0013] The invention provides a high-toughness plastic mold steel. The chemical composition of the mold steel ...

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Abstract

The invention relates to the field of steel for dies, in particular to high-toughness plastic die steel and a production method thereof. The die steel comprises the chemical components of, by mass, 0.55-0.75% of C, 2.00-3.50% of Mn, 0.45-0.50% of Mo, 2.00-3.00% of Cr, 0.40-0.60% of Sr, 0.80-1.20% of Ni, 0.02-0.04% of S, 0.20-0.30% of V, 0.004% of Ca and the balance Fe and unavoidable impurities. The production method comprises the following steps of plate blank heating, rolling, steel plate slow cooling, normalizing treatment and tempering heat treatment. By controlling rolling and the normalizing process, crystal particles are greatly refined, the hardness uniformity is high, the impact toughness is high, the free-cutting effect is obvious, the performance is stable, and the toughness ishigh.

Description

technical field [0001] The invention relates to the field of mold steel, in particular to a high-toughness plastic mold steel and a production method thereof. Background technique [0002] At present, with the lightening of automobiles and the enlargement of electrical products, the requirements for the performance of die steel are getting higher and higher. Die steel is required to have excellent machinability, small heat treatment deformation, and good dimensional stability. In order to meet the above requirements, the use of pre-hardened die steel has attracted more and more attention. This steel has high purity, stable performance, uniform hardness distribution, good processability and surface finish. The common thickness specification of the steel plate for making plastic molds is 25-120mm. The plastic molds produced by quenching and tempering heat treatment processes have large hardness fluctuations in the thickness direction and are not easy to cut, and the actual pe...

Claims

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Application Information

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IPC IPC(8): C22C38/58C22C38/44C22C38/46C21D8/02C21D1/28
CPCC22C38/58C21D1/28C21D8/0226C21D8/0263C22C38/002C22C38/44C22C38/46
Inventor 莫祖勇
Owner 莫祖勇
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