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High-manganese low-chromium type hot work die steel and preparation method thereof

A hot work die steel, high manganese technology, applied in the field of hot work die steel, can solve the problems of drop, poor toughness and plasticity, poor secondary hardening ability during tempering, etc. The effect of improving thermal fatigue resistance

Inactive Publication Date: 2019-02-12
KUNMING UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Due to the high total alloy content, 3Cr2W8V has high strength and hardness, good cold and heat fatigue resistance and good hardenability, but its toughness and plasticity are poor, so it is only suitable for high temperature and high stress without impact load. punch, die
H13 steel has high hardenability, high toughness and thermal cracking resistance, but the secondary hardening ability of tempering is poor, and the hardness drops rapidly when the service temperature is higher than 540°C, that is, the maximum working temperature of H13 steel is 540°C

Method used

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  • High-manganese low-chromium type hot work die steel and preparation method thereof
  • High-manganese low-chromium type hot work die steel and preparation method thereof
  • High-manganese low-chromium type hot work die steel and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] Example 1: Based on the mass percentage of high manganese and low chromium type hot work die steel in this example, including C 0.35%, Si0.50%, Mn 0.60%, Cr 3.75%, Mo 0.80%, V 0.30%, Co 0.50 %, Ni 0.80%, P 0.006%, S 0.004%, the balance is Fe and unavoidable impurities;

[0029] A preparation method of high manganese and low chromium type hot work die steel, the specific steps are:

[0030] (1) Weigh pig iron, ferrosilicon, ferromanganese, ferrochrome, ferromolybdenum, vanadium-iron-cobalt and nickel according to the chemical composition of high manganese and low chromium hot work die steel;

[0031] (2) Add the materials prepared in step (1) into an induction furnace for induction melting to obtain molten steel, wherein the melting temperature is 1640°C;

[0032] (3) Stir the molten steel smelted in step (2) evenly, then cast to obtain steel ingot I of Φ80mm, then place steel ingot I as a consumable electrode in the electroslag remelting device for electroslag remeltin...

Embodiment 2

[0041] Example 2: Based on the mass percentage of high manganese and low chromium hot work die steel in this example, including C0.40%, Si0.80%, Mn0.80%, Cr4.00%, Mo1.00%, V0. 40%, Co2.50%, Ni1.50%, P0.006%, S0.004%, the balance is Fe and unavoidable impurities;

[0042] A preparation method of high manganese and low chromium type hot work die steel, the specific steps are:

[0043] (1) Weigh pig iron, ferrosilicon, ferromanganese, ferrochrome, ferromolybdenum, vanadium-iron-cobalt and nickel according to the chemical composition of high manganese and low chromium hot work die steel;

[0044] (2) Add the materials prepared in step (1) into an induction furnace for induction melting to obtain molten steel, wherein the melting temperature is 1640°C;

[0045] (3) Stir the molten steel smelted in step (2) evenly, then cast to obtain steel ingot I of Φ80mm, then place steel ingot I as a consumable electrode in the electroslag remelting device for electroslag remelting to obtain re...

Embodiment 3

[0054] Example 3: Based on the mass percentage of high manganese and low chromium hot work die steel in this example, including C0.42%, Si1.00%, Mn1.00%, Cr4.20%, Mo1.10%, V0. 50%, Co4.50%, Ni2.50%, P0.006%, S0.004%, the balance is Fe and unavoidable impurities;

[0055] A preparation method of high manganese and low chromium type hot work die steel, the specific steps are:

[0056] (1) Weigh pig iron, ferrosilicon, ferromanganese, ferrochrome, ferromolybdenum, vanadium-iron-cobalt and nickel according to the chemical composition of high manganese and low chromium hot work die steel;

[0057] (2) Add the materials prepared in step (1) into the electric furnace for electric furnace melting to obtain molten steel, wherein the melting temperature is 1640°C;

[0058] (3) Stir the molten steel smelted in step (2) evenly, then cast to obtain steel ingot I of Φ80mm, then place steel ingot I as a consumable electrode in the electroslag remelting device for electroslag remelting to ob...

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Abstract

The invention relates to high-manganese low-chromium type hot work die steel and a preparation method of the high-manganese low-chromium type hot work die steel, and belongs to the technical field ofhot work die steel. The high-manganese low-chromium type hot work die steel is prepared from, by mass, 0.35-0.45% of C, 0.50-1.20% of Si, 0.60-1.20% of Mn, 3.75-4.50% of Cr, 0.80-1.20% of Mo, 0.30-0.60% of V, 0.50-5.50% of Co, 0.80-3.00% of Ni, less than 0.02% of P, less than 0.02% of S and the balance Fe and inevitable impurities. The high-manganese low-chromium type hot work die steel is prepared through the processes of material preparation, smelting, casting, electroslag remelting, high temperature homogenization treatment, forging, annealing and heat treatment. Compared with existing H13hot work die steel, the high-manganese low-chromium type hot work die steel has higher toughness and higher heat stability.

Description

technical field [0001] The invention relates to a high-manganese and low-chromium hot work die steel and a preparation method thereof, belonging to the technical field of hot work die steel. Background technique [0002] Mold is the foundation of industrial development and one of the symbols of the development level of modern manufacturing industry. Without high-level molds, there will be no high-level industrial products. Mold forming, such as precision stamping, precision forging, pressure casting, cold extrusion, hot extrusion and other new processes to replace traditional cutting processes can greatly reduce product costs, improve product quality and production efficiency, improve material utilization, and save resources. [0003] Hot work dies are the main tools for hot metal forming, such as hot forging dies, hot extrusion dies, die-casting dies, etc. Due to the complex service conditions of the hot work mold, the working characteristic is to bear the alternating loa...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C38/02C22C38/04C22C38/44C22C38/46C22C38/52C21D8/00C21D1/26C21D1/18
CPCC21D1/18C21D1/26C21D8/005C22C38/02C22C38/04C22C38/44C22C38/46C22C38/52
Inventor 李绍宏
Owner KUNMING UNIV OF SCI & TECH
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