Method for preparing quenching liquid

A technology of quenching liquid and preparation steps, applied in the direction of quenching agent, manufacturing tools, heat treatment equipment, etc., can solve the problems of poor quenching effect, uneven internal structure and easy cracking of large shaft forgings made of 35CrMo steel, and achieve heat exchange The effect of slow, release tissue stress, and uniform cooling rate on the surface

Active Publication Date: 2015-03-04
马鞍山金泉工业介质科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] In the prior art, there is no suitable method for preparing a quenching agent for large-scale shaft forgings made of 35CrMo steel, and the quenching liquid prepared by a common quenching liquid preparation method has poor quenching effect on large-scale shaft forgings made of 35CrMo steel, insufficient hardness after quenching, and internal structure. Inhomogeneous, prone to cracking, high cost and other problems, the present invention provides a preparation method of quenching liquid, the cooling rate of the quenching liquid obtained by the pre

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0032] A special quenching liquid for large shaft forgings made of 35CrMo, its composition and mass parts are: polypropylene-methacrylic acid copolymer (referred to as PP-g-GAM, purchased from Hangzhou Tuomu Technology Co., Ltd.) and polypropylene 10 parts of acrylamide mixture (mass ratio of polypropylene-methacrylic acid to polyacrylamide is 1:1), 3 parts of random copolymer of ethylene oxide and propylene oxide (average molecular weight is 20000), polyamide polyethylene 3 parts of glycol, 0.4 part of defoamer (polyether, average molecular weight is 6000), 5 parts of water, 4 parts of dispersant (polydimethylsiloxane), the preparation steps of this quenching liquid are:

[0033] (a) Weigh 5 parts of polypropylene-methacrylic acid polymer and 5 parts of polyacrylamide in parts by mass and add them into a mixing tank with a stirring device at 28°C and stir evenly (stirring speed is 200rpm), Obtain a solid mixture of polypropylene-methacrylic acid polymer and polyacrylamide;

...

Embodiment 2

[0041] A special quenching liquid for large shaft forgings made of 35CrMo, its composition and mass parts are: polypropylene-methacrylic acid copolymer (referred to as PP-g-GAM, purchased from Hangzhou Tuomu Technology Co., Ltd.) and polypropylene 8 parts of acrylamide mixture (mass ratio of polypropylene-methacrylic acid to polyacrylamide is 1:1), 4 parts of random copolymer of ethylene oxide and propylene oxide (average molecular weight is 25000), polyamide polyethylene 2 parts of glycol, 0.5 part of defoamer (polyether, average molecular weight is 8000), 7 parts of water, 2 parts of dispersant polydimethylsiloxane, the preparation steps of this quenching liquid are:

[0042] (a) Weigh 4 parts of polypropylene-methacrylic acid polymer and 4 parts of polyacrylamide in parts by mass and add them into a mixing tank with a stirring device at 30°C and stir evenly (stirring speed is 240rpm), Obtain a solid mixture of polypropylene-methacrylic acid polymer and polyacrylamide;

[0...

Embodiment 3

[0049] A special quenching liquid for large shaft forgings made of 35CrMo, its composition and mass parts are: polypropylene-methacrylic acid copolymer (referred to as PP-g-GAM, purchased from Hangzhou Tuomu Technology Co., Ltd.) and polypropylene 12 parts of acrylamide mixture (mass ratio of polypropylene-methacrylic acid to polyacrylamide is 1:1), 2 parts of random copolymer of ethylene oxide and propylene oxide (average molecular weight is 30000), polyamide polyethylene 4 parts of diol, 0.6 part of defoamer (polyether, average molecular weight is 7000), 3 parts of water, 5 parts of dispersant polydimethylsiloxane, the preparation steps of this quenching liquid are:

[0050] (a) Weigh 6 parts of polypropylene-methacrylic acid polymer and 6 parts of polyacrylamide in parts by mass and add them into a mixing tank with a stirring device at 35°C and stir evenly (stirring speed is 300rpm), Obtain a solid mixture of polypropylene-methacrylic acid polymer and polyacrylamide;

[00...

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Abstract

The invention discloses a method for preparing a quenching liquid, and belongs to the technical field of thermal treatment quenching. The quenching liquid consists of a mixture of polypropylene-methacrylic acid and polyacrylamide, a random copolymer of ethylene oxide and propylene epoxide, polyamide polyethylene glycol, a defoaming agent and water. The quenching liquid is mainly applicable to quenching of large-size 35CrMo steel forged shaft pieces, the process is simple, the conventional double-liquid/three-liquid quenching process is changed, by adopting the quenching liquid prepared by using the method disclosed by the invention, the large-size 35CrMo steel forged shaft pieces are effectively prevented from being cracked when being quenched, the quenching effect is good, the defects that the large-size 35CrMo steel forged shaft pieces are insufficient in hardness, not uniform in internal tissue form, easy to crack and the like when being quenched by using ordinary rapid quenching oil are overcome, and the prepared quenching liquid has the advantages of good dispersibility and high storage property.

Description

technical field [0001] The invention belongs to the technical field of heat treatment and quenching, and more specifically relates to a method for preparing a quenching liquid. Background technique [0002] The earliest historical records of the quenching process can be found in the "Clear Water Quenching its Peak" in "Han Shu·Wang Bao Biography". In 1863, a British metallographer and geologist showed six different metallographic structures of steel under a microscope, proving that when steel is heated and cooled, the internal structure will change, and the phase at high temperature in the steel will transform when it is quenched as a harder phase. Therefore, metals usually use heat treatment to improve the strength and metallographic structure of the metal to obtain the desired properties, and the quenching medium is one of the key factors to obtain high quenching quality. Commonly used quenching mediums include brine, water , mineral oil, air, etc. The traditional water...

Claims

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Application Information

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IPC IPC(8): C21D1/56
CPCC21D1/60
Inventor 郑益刘凌赵慧
Owner 马鞍山金泉工业介质科技有限公司
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