Water-soluble quenching medium for aluminum alloy precision part

A quenching medium, precision parts technology, applied in the direction of quenching agent, heat treatment equipment, manufacturing tools, etc., can solve the problems of large quenching residual stress, inability to take into account mechanical properties, small residual stress, etc., to achieve strong cooling capacity, reduce deformation and residual stress Stress, the effect of reducing residual stress
CN104726656AInactive Publication Date: 2015-06-24GENERAL RESEARCH INSTITUTE FOR NONFERROUS METALS BEIJNG
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
GENERAL RESEARCH INSTITUTE FOR NONFERROUS METALS BEIJNG
Publication Date
2015-06-24
Estimated Expiration
Not applicable · inactive patent

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Abstract

The invention discloses a water-soluble quenching medium for an aluminum alloy precision part and belongs to the metal heat treatment quenching agent technology. The water-soluble quenching medium comprises, by weight, 18-22% of polyalkylene glycol (with molecular weight of 8000), 0.6-1.0% of an antiseptic, a proper amount of an antifoaming agent and a settling agent, and the balance water. The water-soluble quenching medium has the advantages that 1, the problem that cold water as an aluminum alloy quenching medium has a fast cooling rate so that quenched residual stress is very large and the part can deform and crack is solved, and 2, it is solved that in hot water quenching, a cooling rate can be adjusted but quenching effects do not satisfy usage requirements. The water-soluble quenching medium can reduce an aluminum alloy initial cooling speed, has a strong cooling capability at a temperature of 440-250 DEG C, has good cooling characteristics and does not corrode a workpiece. The water-soluble quenching medium can reduce aluminum alloy part quenched residual stress, does not influence quenching effects and mechanical properties after aging and belongs to the field of metal heat treatment quenching agents.
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Description

technical field

[0001] The invention belongs to the technical field of quenching agents for metal heat treatment, and in particular relates to a water-soluble quenching medium used for aluminum alloy precision parts. Background technique

[0002] In the heat treatment of aluminum alloys, water is generally used as the quenching medium. For aluminum alloy precision parts, if the water cooling speed is too fast, the parts will be seriously deformed and the quenching residual stress will increase, which will increase the workload and difficulty of calibration, making it difficult to guarantee the size of the parts. Parts are scrapped due to poor stability or even cracking during use. At present, hot water at 60°C-70°C is selected as the quenching medium for some aluminum alloys used in aviation. Although it can reduce the quenching residual stress of parts, it affects the quenching effect, resulting in a decrease in mechanical properties such as tensile strength after aging. ...

Claims

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