Oil quenching heat treating process for low chrome multielement alloy cast balls

A multi-element alloy and casting ball technology, which is applied in heat treatment furnaces, heat treatment equipment, quenching agents, etc., can solve the problem of unsatisfactory comprehensive mechanical properties such as hardness, toughness, and wear resistance, as-cast structure cannot be changed, and product performance is unstable And other problems, to achieve good thermal oxidation stability, low broken ball rate, cost-effective effect

CN102560019AInactive Publication Date: 2012-07-11安徽纽亚达科技有限责任公司
1 Cites 1 Cited by

Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
Publication Date
2012-07-11
Estimated Expiration
Not applicable · inactive patent

Smart Images

  • Figure 1
    Figure 1
Patent Text Reader

Abstract

The invention discloses an oil quenching heat treating process for low chrome multielement alloy cast balls. The main constituents of the low chrome multielement alloy cast balls includes, by weight percentage, C (carbon) 1.5-2.0, Mn (manganese):0.3-1.0, Cr (chromium):2.0-2.8, S (sulphur): <=0.02, P (phosphorus) : <=0.03, and the matrix iron. The heat treating process includes heating as-cast low chrome multielement alloy cast balls to 950-1000 DEG C, subjecting the cast balls to an oil cold treatment after 2-3 hours of heat insulation, when the surface temperature of the as-cast low chrome multielement alloy cast balls is reduced below 250 DEG C, removing the product from an oil pool, stopping the oil cold treatment, subjecting the product to a tempering treatment in a tempering furnace, and subjecting the cast balls to a quenching treatment again after the tempering treatment. The oil quenching heat treating process solves the problem of poor quality in use of the low chrome multielement alloy cast balls in the as cast condition. By means of the oil quenching heat treating process, the products have no cracks; rigidity, toughness and anti-fatigue impact life are increased, consumption is reduced, ball crushing rate is low, a mass of chromium alloy resources are saved and operating cost is reduced for users.
Need to check novelty before this filing date? Find Prior Art

Description

Technical field:

[0001] The invention relates to a heat treatment process for quenching chromium alloy cast steel and chromium alloy cast iron, in particular to a low chromium cast ball oil quenching heat treatment process. technical background:

[0002] Chromium alloy casting balls and casting segments are a kind of grinding medium widely used in powder engineering such as cement, thermal power, magnetic powder, and mineral processing. Various production enterprises and scientific research units are constantly exploring and developing new processes to reduce consumption during use. Therefore, choosing an appropriate heat treatment process is the key to improving the quality of chromium alloy casting balls and casting segments.

[0003] At present, there are three types of chromium-based alloy casting balls and casting sections produced at home and abroad: high-chromium alloy casting balls and casting sections, low-chromium alloy casting balls and casting sections, and low-c...

Examples

Embodiment Construction

[0028] A low-chromium multi-element alloy cast ball oil quenching heat treatment process, characterized in that: the weight percentage of the components contained in the low-chromium multi-element alloy cast ball is: C: 1.5-2.0, Mn: 0.3-1.0, Cr: 2.0- 2.8, S: ≤0.02, P: ≤0.03, the matrix is ​​iron; the low-chromium multi-element alloy cast ball adopts oil quenching heat treatment process, and its specific process steps include:

[0029] a. Put the as-cast low-chromium multi-element alloy casting ball just taken out of the mold into the special quenching frame quantitatively, and then put it in the quenching furnace for heating. After heating to 950-1000°C, keep it warm for 2-3 hours;

[0030] b. Pour the low-chromium multi-element alloy casting balls after heating and heat preservation into the quenching shaker, and then sink into the quenching oil with the quenching shaker, and make the cast balls and casting segments roll freely with the up and down movement and shaking of the ...