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Steel heat treatment deformation treatment method

A technology of heat treatment deformation and treatment method, applied in the field of heat treatment of metal materials, can solve the problems of high hardness, high yield strength, and easy cracks in correction, and achieve the effects of small cooling rate, small deformation, and uniform force

Inactive Publication Date: 2014-08-06
CHONGQING JIANSHE IND GRP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0009] However, due to the high hardness and high yield strength of parts after heat treatment, cracks are likely to occur after heat treatment; in addition, there are certain limitations in the amount of reserved deformation during machining, which will change the thickness and design dimensions of some parts of the part, etc. , which is not allowed for parts with high size requirements

Method used

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Embodiment Construction

[0039] Attached below Figures 1 to 4 Specific embodiments of the present invention are described in detail.

[0040] In an embodiment of the present invention, taking a joint sleeve of a firearm part as an example, a steel heat treatment deformation treatment method of the present invention is applied to the heat treatment process of the joint sleeve for illustration.

[0041] It should be noted that although the present invention is described here by applying a steel heat treatment and deformation treatment method according to the present invention to the heat treatment process of a typical component joint made of 25Cr2Ni4WA steel, those skilled in the art can understand Yes, the present invention is not limited thereto. Rather, the present invention can also be applied to the heat treatment process of other parts made of 25Cr2Ni4WA steel (for example, firing pin, hammer, joint sleeve, bolt, bolt frame, machine head, shell hook, ejector rod, etc.) middle.

[0042] The kno...

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Abstract

The invention discloses a steel heat treatment deformation treatment method aiming at easily deformable parts during a heat treatment process, such as a part manufactured from 25Cr2Ni4WA steel and the like. Before heat treatment, certain heat shrinkage deformation amount is reserved, such that the part is restored to an original size after heat treatment. Also, according to the method, with a direct air-cooling quenching method, the part does not deform or slightly deforms. Therefore, with the steel heat treatment deformation treatment method provided by the invention, a problem of severe deformation of a part prepared form easily deformable materials such as 25Cr2Ni4WA steel during the heat treatment process can be effectively solved.

Description

technical field [0001] The invention relates to an improved heat treatment deformation treatment method for steel, in particular to a treatment method suitable for heat treatment deformation of 25Cr2Ni4WA steel, which can be applied to solve the serious deformation problem of easy-to-deform materials such as 25Cr2Ni4WA firearm parts heat treatment, and belongs to the field of metal material heat treatment . Background technique [0002] 25Cr2Ni4WA steel is a martensitic advanced high-quality alloy structural steel with high comprehensive mechanical properties, high notch resistance sensitivity and low brittle transition temperature. 25Cr2Ni4WA steel is used for all the parts on firearms that are thin in size, complex in shape, and subject to harsh stress conditions. In the manufacture of firearms, this kind of steel is mostly used to make parts that withstand large fatigue or impact loads, such as firing pins, hammers, joint sleeves, bolts, bolt frames, machine heads, shell...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C21D8/00
Inventor 况勋黄龙
Owner CHONGQING JIANSHE IND GRP
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