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Novel process for double medium oil-air quenching of alloy wear resistant casting

A new process, dual-medium technology, applied in the quenching process of alloy steel and alloy wear-resistant castings, can solve the problems of impermeable quenching, high production cost, low production efficiency, etc., to improve comprehensive mechanical properties, reduce production costs, The effect of improving productivity

Active Publication Date: 2005-03-16
安徽省凤形新材料科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although single oil quenching can improve the hardness of products and improve production efficiency, the oil quenching process is difficult to master, and improper control will lead to quenching cracks, and the production cost is too high; although single air quenching does not have the problem of quenching cracks, the production efficiency is low. The product has impermeable quenching, uneven hardness, and is prone to out-of-round, peeling and broken phenomena during use

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0019] The workpiece to be quenched is an alloy wear-resistant cast ball with a diameter of 6mm.

[0020] The first process: put the alloy wear-resistant cast balls heated to the quenching temperature of 920°C out of the heat treatment furnace, place them in the quenching cradle, and spread them evenly;

[0021] The second process: Shake the quenching cradle to make the quenching cradle move up and down, so that the alloy wear-resistant casting can roll freely on it;

[0022] The third process: immerse the quenching cradle in the quenching oil pool, and perform oil-cooling quenching treatment on the alloy wear-resistant castings. The quenching medium is No. 10 engine oil. The oil temperature during quenching is controlled at 25-90°C. At the same time, stir with strong wind Oil pool, the control air volume is 1800m 3 / min, the wind pressure is 5000Pa;

[0023] The fourth process: When the surface temperature of the alloy wear-resistant casting drops below 600°C, raise the que...

Embodiment 2

[0027] The workpiece to be quenched is an alloy wear-resistant cast ball with a diameter of 50mm.

[0028] The first process: put the alloy wear-resistant casting balls heated to the quenching temperature of 980°C out of the heat treatment furnace, place them in the quenching cradle, and spread them evenly;

[0029] The second process: Shake the quenching cradle to make the quenching cradle move up and down, so that the alloy wear-resistant casting can roll freely on it;

[0030] The third process: immerse the quenching cradle in the quenching oil pool, and carry out oil-cooling quenching treatment on the alloy wear-resistant castings. The quenching medium is No. 20 engine oil, and the oil temperature during quenching is controlled at 25-90°C. Oil pool, the control air volume is 3000m 3 / min, the wind pressure is 8000Pa;

[0031] The fourth process: When the surface temperature of the alloy wear-resistant casting drops below 600°C, raise the quenching cradle so that the allo...

Embodiment 3

[0035] The workpiece to be quenched is an alloy wear-resistant cast ball with a diameter of 150 mm.

[0036] The first process: put the alloy wear-resistant cast balls heated to the quenching temperature of 1100°C out of the heat treatment furnace, place them in the quenching cradle, and spread them evenly;

[0037] The second process: Shake the quenching cradle to make the quenching cradle move up and down, so that the alloy wear-resistant casting can roll freely on it;

[0038] The third process: immerse the quenching cradle in the quenching oil pool, and carry out oil-cooling quenching treatment on the alloy wear-resistant castings. The quenching medium is No. 20 engine oil, and the oil temperature during quenching is controlled at 25-90°C. Oil pool, the control air volume is 5000m 3 / min, the wind pressure is 10000Pa;

[0039] The fourth process: When the surface temperature of the alloy wear-resistant casting drops below 600°C, raise the quenching cradle so that the all...

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Abstract

The invention relates to an alloy abrasion-proof casting double medium oil wind quenching process, characterized as : adopting oil quenching mode in high temperature stage, when product temperature reducing to a certain temperature, adopting slow wind quenching mode, of the quenched product in the invention, quenching rigidity is >=58HRc ,rigidity difference is <=2.5HRc, which fully solve the quenching crack, promote the integral mechanical property.

Description

technical field [0001] The invention relates to a heat treatment process for alloy wear-resistant castings, in particular to a quenching process for alloy steel and alloy wear-resistant castings. Background technique [0002] Alloy wear-resistant casting is a kind of grinding medium widely used in powder engineering in building materials, mining, chemical industry, thermal power and other industries, and it is mass-produced by casting method. In order to make alloy wear-resistant castings have excellent comprehensive mechanical properties such as hardness, toughness, wear resistance, and corrosion resistance, selecting a suitable heat treatment method is a key process for quality control. [0003] At present, the quenching heat treatment process of alloy wear-resistant castings basically adopts a single medium quenching, such as: or oil quenching, or wind quenching. Although single oil quenching can improve the hardness of products and improve production efficiency, the oil...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C21D1/18
Inventor 陈宗明赵金华沈茂林汪国清
Owner 安徽省凤形新材料科技有限公司
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