Steel for liner plate forging die, liner plate forging die and preparation method thereof

A technology of steel for molds and liners, which is applied in the field of steel for forging molds for liners, forging molds for liners and their preparation fields, and can solve the problems of normal temperature performance and high temperature performance that cannot meet the requirements of forging production liners, coarse grains, and environmental pollution, etc. problems, to meet the use of technical requirements and cost requirements, high-strength effect

Active Publication Date: 2016-04-06
SHANDONG HUAMIN STEEL BALL
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  • Summary
  • Abstract
  • Description
  • Claims
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AI Technical Summary

Problems solved by technology

Most of the above-mentioned liner materials have high hardness and low toughness, so the current liner preparation method is usually casting method
Therefore, the current lining plate preparation method has almost all the shortcomings of the casting molding method: polluting the environment, high labor intensity of workers, high energy consumption, prone to casting defects (segregation, porosity and porosity), and the resulting liner structure Loose, coarse grains, low and uneven performance of each part, which seriously affects the wear resistance and impact resistance of the prepared liner, and reduces the service life of the liner
Currently commonly used forging die steels include W18Cr4V; W6Mo5Cr4V2, etc., but the existing forging die steels cannot meet the requirements of forging production liners in terms of overall normal temperature performance and high temperature performance

Method used

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  • Steel for liner plate forging die, liner plate forging die and preparation method thereof

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preparation example Construction

[0036] The present invention also provides a method for preparing the above-mentioned liner forging die, comprising the following steps:

[0037] 1) Steelmaking: molten steel is obtained through steelmaking, and the end point components of the molten steel include the following components in weight percentage: 0.5% to 0.6% of C; 0.2% to 0.6% of Si; 0.4% to 0.8% of Mn; 2 %~5% W; 3%~5% Cr; 1%~3% Mo; 1%~5% Co; 0.001%~0.005% Nb; 2%~4% V; 0.02%~ 0.1% Ti, the rest is Fe and unavoidable impurities;

[0038] 2) casting: casting the molten steel obtained in step 1) to obtain steel ingots or billets for forging;

[0039] 3) forging: forging the steel ingot or billet obtained after casting in step 2) into a forging close to the shape of the lining plate forging die;

[0040] 4) Finishing: process the forging obtained after step 3) into the design size of the forging liner die through machine tools;

[0041] 5) Quenching: heat the finished forging in step 4) to 1150°C-1200°C in a vacuu...

Embodiment 1

[0048] A method for preparing a liner forged liner, comprising the following steps:

[0049] 1) Steelmaking: molten steel is obtained through steelmaking, and the end point composition of the molten steel includes the following components in weight percentage: 0.5% of C; 0.6% of Si; 0.4% of Mn; 5% of W; 3% of Cr; 3% Mo; 1% Co; 0.005% Nb; 2% V; 0.1% Ti, the rest is Fe and unavoidable impurities;

[0050] 2) casting: casting the molten steel obtained in step 1) to obtain steel ingots for forging;

[0051] 3) forging: forging the steel ingot obtained after step 2) into a forging close to the shape of the liner plate forging die;

[0052] 4) Finishing: process the forging obtained after step 3) into the design size of the forging liner die through machine tools;

[0053] 5) Quenching: heat the finished forging in step 4) to 1150°C in a vacuum furnace, and perform oil quenching treatment, and the oil quenching time is 4 minutes;

[0054] 6) Tempering: Tempering the forging obtai...

Embodiment 2

[0057] 1) Steelmaking: molten steel is obtained through steelmaking, and the end point composition of the molten steel includes the following components in weight percentage: 0.53% C; 0.4% Si; 0.5% Mn; 3.5% W; 4.5% Cr; 1.5% Mo; 3.5% Co; 0.003% Nb; 2.5% V; 0.06% Ti, the rest is Fe and unavoidable impurities;

[0058] 2) casting: casting the molten steel obtained in step 1) to obtain steel ingots for forging;

[0059] 3) forging: forging the steel ingot obtained after step 2) into a forging close to the shape of the liner plate forging die;

[0060] 4) Finishing: process the forging obtained after step 3) into the design size of the forging liner die through machine tools;

[0061] 5) Quenching: heat the finished forging in step 4) to 1180°C in a vacuum furnace, and perform oil quenching treatment, and the oil quenching time is 4 minutes;

[0062] 6) Tempering: Tempering the forging obtained after the oil quenching in step 5), the tempering temperature is 570° C., and the hold...

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Abstract

The invention discloses steel for a liner plate forging die. The steel for the liner plate forging die is prepared from, by weight, C 0.5%-0.6%, Si 0.2%-0.6%, Mn 0.4%-0.8%, W 2%-5%, Cr 3%-5%, Mo 1%-3%, Co 1%-5%, Nb 0.001%-0.005%, V 2%-4%, Ti 0.02%-0.1% and the balance Fe and inevitable impurities. The requirements for normal-temperature performance and high-temperature performance of the forging die are met, the steel has higher strength, hardness, toughness and abrasion resistance in a normal-temperature state and a high-temperature state and is a material used for the forging die and meeting the technical requirements of usage and cost requirements. The invention further provides the liner plate forging die made of the steel for the liner plate forging die and a preparation method of the liner plate forging die.

Description

technical field [0001] The invention relates to the technical field of liner dies, in particular to a steel for a liner forging die, a liner forging die and a preparation method thereof. Background technique [0002] In metallurgy, mining, electric power, building materials and other industrial industries, a large number of lining plates are used for crushing, grinding, and conveying of materials. The lining plates are subjected to different degrees of wear and impact, resulting in a short service life of the lining plates. It is frequently replaced and consumes a lot of money. It is the main wearing part. [0003] At present, the lining materials used in various industries mainly include high manganese steel, multi-element low alloy steel, chromium series white cast iron and so on. Most of the above-mentioned liner materials have high hardness and low toughness, so that the current liner preparation method is usually a casting method. Therefore, the current lining plate p...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C38/18C22C38/12C22C38/10C22C38/14C22C38/04C22C38/02C21D1/18B21J13/02
CPCB21J13/02C21D1/18C21D2211/008C22C38/02C22C38/04C22C38/10C22C38/12C22C38/14C22C38/18
Inventor 侯宇岷
Owner SHANDONG HUAMIN STEEL BALL
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