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Die steel with high heat resistance, high stability and high tenacity and manufacturing technology thereof

A technology with high stability and manufacturing process, which is applied in the field of die steel and its manufacturing process, can solve the problems of insufficient stability of quality, and achieve the effects of good thermal stability, excellent center cracking and toughness, and good thermal conductivity

Active Publication Date: 2017-07-21
SHANDONG XINHUOXIN MATERIAL TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] The invention aims at the shortcomings of the existing hot work die steel in the aspect that the quality of the large extrusion die is not stable enough, and provides a hot work die steel with high heat resistance, high stability and high toughness and its manufacturing process

Method used

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  • Die steel with high heat resistance, high stability and high tenacity and manufacturing technology thereof
  • Die steel with high heat resistance, high stability and high tenacity and manufacturing technology thereof
  • Die steel with high heat resistance, high stability and high tenacity and manufacturing technology thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0054] A hot work die steel, the matrix of which is composed of the following elements by weight fraction:

[0055] C is 0.37%, Si is 0.40%, Mn is 0.38%, Cr is 4.50%, Ni is 0.08%, Mo is 1.40%, V is 0.40%, Nb 0.01%, Ti 0.02%, Os 0.01%, La 0.04%, Co 0.006%, W 0.005%, Cu ≤0.06%, S ≤0.005%, P ≤0.015%, and the balance is Fe.

[0056] The manufacturing process of the above-mentioned hot work die steel is as follows:

[0057] 1) Electric furnace smelting: batching is carried out according to the chemical composition of the substrate in Example 1, placed in an electric furnace for smelting, the chemical composition in the furnace is analyzed during the smelting process, and the steel is tapped after the chemical composition meets the requirements;

[0058] 2) Electroslag remelting: The material composition of the slag system is: by weight fraction, 20% of alumina, 5% of magnesium oxide, 25% of calcium oxide, 48% of calcium fluoride, and 2% of silicon oxide. The process conditions ar...

Embodiment 2

[0063] A hot work die steel, the matrix of which is composed of the following elements by weight fraction:

[0064] C 0.42%, Si 0.60%, Mn 0.55%, Cr 5.50%, Ni 0.20%, Mo 1.80%, V 0.80%, Nb 0.03%, Ti 0.05%, Os 0.03%, La 0.06% , Co 0.012%, W 0.010%, Cu ≤0.06%, S ≤0.005%, P ≤0.015%, and the balance is Fe.

[0065] The manufacturing process of the above-mentioned hot work die steel is as follows:

[0066] 1) Electric furnace smelting: batching is carried out according to the chemical composition of the substrate in Example 2, placed in an electric furnace for smelting, the chemical composition in the furnace is analyzed during the smelting process, and the steel is tapped after the chemical composition meets the requirements;

[0067] 2) Electroslag remelting: The material composition of the slag system is: by weight fraction, 25% of alumina, 7% of magnesium oxide, 20% of calcium oxide, 46% of calcium fluoride, and 2% of silicon oxide. The process conditions are controlled as foll...

Embodiment 3

[0072] A hot work die steel consisting of the following elements by weight fraction:

[0073] C 0.38%, Si 0.45%, Mn 0.42%, Cr 4.70%, Ni 0.10%, Mo 1.50%, V 0.50%, Nb 0.02%, Ti 0.03%, Os 0.01%, La 0.04% , Co 0.008%, W 0.005%, Cu ≤0.06%, S ≤0.005%, P ≤0.015%, and the balance is Fe.

[0074] The manufacturing process of the above-mentioned hot work die steel is as follows:

[0075] 1) electric furnace smelting: batching is carried out according to the chemical composition of the substrate in embodiment 3, placed in an electric furnace for smelting, the chemical composition in the furnace is analyzed during the smelting process, and the steel is tapped after the chemical composition meets the requirements;

[0076] 2) Electroslag remelting: The material composition of the slag system is: by weight fraction, 30% of alumina, 5% of magnesium oxide, 20% of calcium oxide, 43% of calcium fluoride, and 2% of silicon oxide. The process conditions are controlled as follows: voltage 50-70V...

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Abstract

The invention relates to die steel with high heat resistance, high stability and high tenacity and a manufacturing technology of the die steel. A base body of the die steel is prepared from 0.37-0.42% of C, 0.40-0.60% of Si, 0.38-0.55% of Mn, 4.50-5.50% of Cr, 0.08-0.20% of Ni, 1.40-1.80% of Mo, 0.40-0.80% of V, 0.01-0.03% of Nb, 0.02-0.05% of Ti, 0.01-0.03% of Os, 0.04-0.06% of La, 0.006-0.012% of Co, 0.005-0.010% of W, 0.06% or smaller of Cu, 0.005% or smaller of S, 0.015% or smaller of P and the balance Fe. The hot work die steel has the excellent center cracking property, is good in heat resistance and softening property, can keep high hardness for a long time, and is good in heat stability and heat conductivity.

Description

technical field [0001] The invention relates to a die steel and its manufacturing process, in particular to a hot work die steel with high heat resistance, high stability and high toughness and its manufacturing process. Background technique [0002] With the development of my country's industry, the demand for die steel is increasing rapidly. Among the many products in the machinery industry, molds are listed as key industries to support development, which greatly promotes the development of the mold industry. [0003] Hot work dies generally work under harsh working conditions such as high temperature and thermal shock, so hot work die steels are required to have excellent comprehensive properties. At present, H13 steel is widely used in industrial production. H13 is one of the most commonly used hot work die steels. It was first developed by the United States in the second half of the last century. Among the die steels, H13 has outstanding comprehensive properties, so ...

Claims

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Application Information

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IPC IPC(8): C22C38/44C22C38/46C22C38/48C22C38/50C22C38/52C22C38/02C22C38/04C22C33/04C21D6/00
CPCC21D6/004C21D6/005C21D6/007C21D6/008C22C33/04C22C38/002C22C38/005C22C38/02C22C38/04C22C38/44C22C38/46C22C38/48C22C38/50C22C38/52
Inventor 马仁怀
Owner SHANDONG XINHUOXIN MATERIAL TECH CO LTD
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