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Alloy die steel and preparation method thereof

A technology of alloy die steel and alloy composition, which is applied in the field of die materials, can solve problems such as not being able to meet the needs of machining, and achieve the effect of improving performance indicators

Inactive Publication Date: 2013-12-11
CHUZHOU XINLONG ELECTROMECHANICAL
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, the most widely used mold steel material in the mold material market is high-carbon high-chromium mold steel. Its strength and hardness are generally easy to meet, but its toughness is relatively low, which cannot meet the needs of machining.

Method used

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Embodiment Construction

[0008] A method for preparing an alloy mold steel material, including melting, oxidation, detection and adjustment of alloy components, refining, casting, and heat treatment. The weight percentages of the constituent elements of the cast steel are: silicon 0.3-0.4, carbon 1.4-1.5, Manganese 1.2-1.4, Chromium 1.4-1.6, Phosphorus 0.01-0.03, Sulfur 0.02-0.04, Molybdenum 0.4-0.5, Vanadium 1.2-1.4, Mg0.7-0.9, Ta0.04-0.06, W0.08-0.18, balance for iron;

[0009] The heat treatment process is as follows: the ingot is heated to 1020-1045°C at a rate of 110-130°C / hour, and kept at a temperature of 2-3 hours; -8 hours; then heat up to 940-980°C at a rate of 70-90°C / hour, and hold for 2-3 hours; then cool down to 260-280°C at a rate of 80-100°C / hour, and hold for 2-3 hours; Cool to room temperature at a rate of 50-60°C / hour; then put it into liquid nitrogen for 2-3 hours.

[0010] The following refining agents are used during the refining, and are made from the following raw materials i...

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Abstract

The invention provides a preparation method for alloy die steel. The preparation method comprises the following steps: fusing; oxidation; detection of alloy components and adjustment; refining; casting; and heat treatment. The invention is characterized in that cast steel comprises the following elements by weight: 0.3 to 0.4% of silicon, 1.4 to 1.5% of carbon, 1.2 to 1.4% of manganese, 1.4 to 1.6% of chromium, 0.01 to 0.03% of phosphorus, 0.02 to 0.04% of sulfur, 0.4 to 0.5% of molybdenum, 1.2 to 1.4% of vanadium, 0.7 to 0.9% of magnesium, 0.04 to 0.06% of tantalum and 0.08 to 0.18% of tungsten, with the balance being iron. According to the invention, performance indexes of the steel are substantially increased due to utilization of reasonable chemical composition proportions and the advanced preparation method.

Description

technical field [0001] The invention relates to a mold material, in particular to a cold working mold steel. It is used for cold work manufacturing of various precision and complex moulds. Background technique [0002] Dies are used for blanking, stretching, bending, extrusion, upsetting and other processes of metal or non-metal materials. Cold work die steel requires sufficient strength, toughness, hardness, wear resistance, fatigue resistance, deformation resistance, and fracture resistance. At present, the most widely used mold steel material in the mold material market is high-carbon high-chromium mold steel. Its strength and hardness are generally easy to meet, but its toughness is relatively low, which cannot meet the needs of machining. Contents of the invention [0003] The object of the present invention is to provide an alloy mold steel and its preparation method, which has good strength and toughness, and is used for the manufacture of precision and complex mo...

Claims

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Application Information

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IPC IPC(8): C22C38/26
Inventor 鲍小曼
Owner CHUZHOU XINLONG ELECTROMECHANICAL
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