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Manufacturing method of mold steel with uniform surface hardness and wear resistance

A technology of surface hardness and mold steel, which is applied in the field of mold steel, can solve the problems of further improvement of mechanical properties and processing type, high carbon content, etc., and achieve reduction of coarse undissolved crystal phase, uniform surface hardness, wear resistance, and excellent fatigue resistance Effect

Inactive Publication Date: 2018-08-14
HEFEI HUIZHI NEW MACHINERY TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the carbon content of the material is high, and the mechanical properties and processing type need to be further improved.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0030] A method for preparing mold steel with uniform surface hardness and wear resistance, which is carried out according to the following steps:

[0031] The above-mentioned die steel is composed of the following elements by weight percentage: C: 0.21%, Si: 0.32%, Cu: 0.13%, Mn: 0.47%, Cr: 0.65%, Sn: 0.03%, Bi: 0.01%, Sb: 0.08%, Y: 0.14%, La: 0.01%, Mo: 0.15%, B: 0.003%, the balance is Fe, and the unavoidable impurity content is ≤0.01%;

[0032] (1) Smelting: put industrial raw materials into a smelting furnace with a temperature of 1640°C for smelting for 3.5 hours, then transfer to an LF furnace, add a refining agent, and refine for 105 minutes under vacuum at a temperature of 1515°C;

[0033] (2) Casting: cast the refined melt into steel rods under the protection of argon, the casting speed is 1.15m / min, and the casting temperature is set at 1485°C;

[0034] (3) Electroslag remelting: Add the five-element slag system to the obtained steel bar under the protective atmosph...

Embodiment 2

[0047] A method for preparing mold steel with uniform surface hardness and wear resistance, which is carried out according to the following steps:

[0048] The above-mentioned die steel is composed of the following elements by weight percentage: C: 0.21-0.25%, Si: 0.32-0.36%, Cu: 0.13-0.17%, Mn: 0.47-0.49%, Cr: 0.65-0.69%, Sn: 0.03-0.06%, Bi: 0.01-0.03%, Sb: 0.08-0.12%, Y: 0.14-0.18%, La: 0.01-0.014%, Mo: 0.15-0.19%, B: 0.003-0.007%, and the balance is Fe, wherein the unavoidable impurity content is ≤0.01%;

[0049] (1) Smelting: Put industrial raw materials into a melting furnace with a temperature of 1650°C for smelting for 3.8 hours, then transfer to an LF furnace, add a refining agent, and refine for 105 minutes under vacuum at a temperature of 1515°C;

[0050] (2) Casting: cast the refined melt into steel rods under the protection of argon, the casting speed is 1.2m / min, and the casting temperature is set at 1485°C;

[0051] (3) Electroslag remelting: Add the five-eleme...

Embodiment 3

[0064] A method for preparing mold steel with uniform surface hardness and wear resistance, which is carried out according to the following steps:

[0065] The above-mentioned die steel is composed of the following elements by weight percentage: C: 0.25%, Si: 0.36%, Cu: 0.17%, Mn: 0.49%, Cr: 0.69%, Sn: 0.06%, Bi: 0.03%, Sb: 0.12%, Y: 0.18%, La: 0.014%, Mo: 0.19%, B: 0.007%, the balance is Fe, and the unavoidable impurity content is ≤0.01%;

[0066] (1) Smelting: put industrial raw materials into a melting furnace with a temperature of 1660°C for smelting for 3.5 hours, then transfer to an LF furnace, add refining agent, and refine for 105 minutes under vacuum at a temperature of 1515°C;

[0067] (2) Casting: cast the refined melt into steel rods under the protection of argon, the casting speed is 1.25m / min, and the casting temperature is set at 1485°C;

[0068] (3) Electroslag remelting: Add the five-element slag system to the obtained steel bar under the protective atmospher...

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Abstract

The invention discloses a manufacturing method of mold steel with uniform surface hardness and wear resistance, and relates to the technical field of the mold steel. The method comprises the followingsteps of smelting, casting, electroslag remelting, forging, isothermal annealing, quenching and tempering. According to the method, the mold steel is simple and convenient to manufacture and excellent in comprehensive performance.

Description

technical field [0001] The invention relates to the technical field of die steel, in particular to a method for preparing a die steel with uniform surface hardness and wear resistance. Background technique [0002] Die steel is a type of steel used to make molds such as cold stamping dies, hot forging dies, and die casting dies. The quality of the mold directly affects the quality of the pressure processing process, the precision output of the product and the production cost, and the quality and service life of the mold are mainly affected by the material, preparation and heat treatment process of the mold itself in addition to the reasonable structural design and processing accuracy. . With the advancement of science and technology and the needs of social development, the requirements for mold materials are getting higher and higher, especially for large-scale mold materials. Manufacturing enterprises have brought serious losses; and the existing mold materials have gradu...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C38/02C22C38/04C22C38/20C22C38/22C22C38/32C22C38/60C22C33/06C21D8/00C21D1/26C21D1/18
CPCC22C38/008C21D1/18C21D1/26C21D8/005C22C33/06C22C38/002C22C38/005C22C38/02C22C38/04C22C38/20C22C38/22C22C38/32C22C38/60
Inventor 解正来
Owner HEFEI HUIZHI NEW MACHINERY TECH CO LTD
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