Technique for oil quenching casting sphere made from high chrome alloy

A high-chromium alloy and casting ball technology, which is applied in the oil quenching process of the casting section and the field of high-chromium alloy casting balls, can solve the problems of spalling, restriction of wear resistance and service life, and easy occurrence of out-of-roundness, so as to achieve wear resistance and corrosion resistance Increased capacity, multiple economic benefits, and extended service life

Inactive Publication Date: 2005-03-30
ANHUI FENGXING WEAR RESISTANT MATERIALS CO LTD
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Problems solved by technology

However, the production efficiency of air quenching is low, and the products have impermeable quenching, uneven hardness, and easy occurrence of out-of-round, peeling, and broken phenomena during use.
At the same time, limited by the supercooling degree of the air quenching process, the quenching average hardness of high chromium alloy wear-resistant casting balls is difficult to reach 60HRc,...

Method used

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  • Technique for oil quenching casting sphere made from high chrome alloy

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Embodiment Construction

[0017] The invention mainly relates to the quenching treatment of φ6.5-φ130 high chromium alloy wear-resistant casting balls and casting segments in oil medium. Its implementation process is as follows:

[0018] 1. High chromium alloy wear-resistant cast balls and cast segments are heated to the quenching temperature (920-1150°C) in a push rod type continuous heating furnace, and placed on the movable quenching cradle 1 after being released from the furnace (see attached figure), and made to Spread evenly.

[0019] 2. Start the cradle control mechanism to make the quenching cradle move back and forth up and down to ensure that the high chromium alloy wear-resistant casting balls and casting segments can roll freely on it.

[0020] 3. Immerse the movable quenching cradle in the oil pool 2 (see the attached picture) to carry out oil cooling and quenching treatment on the high chromium alloy wear-resistant casting balls and casting segments. The quenching medium is No. 10 or No....

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Abstract

This invention relates to an art for oil-quenching high-chromium alloy cast ball. The high-chromium alloy cast ball and cast-section are heated to quenching temp., then tapped out of the furnace, proceeding oil-quenching, oil temp. being controlled <120 deg.C, when temp. of the product being lowered below 300 deg.C, the cast ball and cast section are taking out of the oil-cell. The wear-resisting high-chromium cast ball and cast section treated by using this method are better than that of prior art treatment in various kinds of technical index, wherein: quenching hardness=60-65 deg.C, difference (between center and surface) of hardness <2.0 RHc, ball falling test >3000 times. This quenching art overcomes prior art defect. The product treated by this method has excellent wear-resisting property and longer service-life.

Description

technical field [0001] The invention relates to a heat treatment process for alloy steel and alloy cast iron quenching, in particular to an oil quenching process for high chromium alloy casting balls and casting segments. Background technique [0002] Alloy wear-resistant casting balls and casting segments are widely used as a grinding medium for powder engineering in building materials, mining, chemical industry, thermal power and other industries, and are mass-produced by casting. In order to make alloy wear-resistant cast balls and cast segments 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 of wear-resistant cast balls and cast segments. [0003] At present, the wear-resistant cast balls and cast segments of high-chromium alloys in the wear-resistant materials industry at home and abroad basically adopt air-cooled que...

Claims

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Application Information

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IPC IPC(8): C21D1/18C21D1/58C21D5/00
Inventor 陈宗明赵金华沈茂林汪国清
Owner ANHUI FENGXING WEAR RESISTANT MATERIALS CO LTD
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