Heat treatment method of alloy steel after forging

A post-forging heat treatment and alloy steel technology, which is applied in the field of heat treatment technology, can solve the problems of high hardness of the workpiece, influence of the mechanical properties of the workpiece, and long heat treatment cycle, etc., achieve good technical requirements, improve comprehensive mechanical properties, and shorten the effect of heat treatment cycle

Active Publication Date: 2013-12-25
ZHEJIANG GEELY AUTOMOBILE RES INST CO LTD +1
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Problems solved by technology

However, in the actual production process, the traditional post-calcination heat treatment process usually puts the workpiece directly into the annealing furnace for ordinary annealing. Due to the long heat treatment cycle of the workpiece in the annealing furnace, it is easy to cause oxidation and decarburization of the workpiece surface, thus affecting The effect of the subsequent quenching and tempering process
For example, the traditional post-calcination heat trea

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  • Heat treatment method of alloy steel after forging

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[0013] In order to further explain the technical means and effects of the present invention to achieve the intended purpose of the invention, the specific implementation, features and effects of the alloy steel post-forging heat treatment method proposed according to the present invention will be described in detail below in conjunction with the preferred embodiments. described as follows. The aforementioned and other technical contents, features and effects of the present invention will be clearly presented in the following detailed description of preferred embodiments with reference to the drawings. Through the description of specific implementation modes, when the technical means and functions adopted by the present invention to achieve the intended purpose can be understood more deeply and specifically, it is not intended to limit the present invention.

[0014] figure 1 It is a flowchart of the post-forging heat treatment method of alloy steel according to an embodiment ...

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Abstract

The invention relates to a heat treatment method of alloy steel after forging. The method comprises the steps of forming a decarburization-preventing and oxidation-resistant protective layer on a surface of an alloy steel workpiece; and then carrying out isothermal annealing on a to-be-treated alloy steel workpiece with the decarburization-preventing and oxidation-resistant protective layer. The heat treatment method of the alloy steel after forging can effectively prevent the surface of the to-be-treated alloy steel workpiece from decarburization and oxidation and shorten a heating period, thereby being beneficial to improve comprehensive mechanical performance of the to-be-treated alloy steel workpiece.

Description

technical field [0001] The invention relates to a heat treatment process, in particular to a post-forging heat treatment method of alloy steel. Background technique [0002] 34CrNi3Mo alloy steel is one of the high-strength alloy steels widely used in the machinery manufacturing industry. It has good comprehensive mechanical properties, good plasticity, toughness, wear resistance, corrosion resistance and certain heat resistance. Tempering stability and wide tempering temperature range, and good cold and hot processing performance. Therefore, 34CrNi3Mo alloy steel is mainly used for parts such as gear shafts, and is especially suitable for important forgings with large cross-sections, high loads and impact loads. [0003] The traditional manufacturing method of the gear shaft includes a forging process, a post-forging heat treatment process, a machining process, and a quenching and tempering process. However, in the actual production process, the traditional post-calcinati...

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Application Information

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IPC IPC(8): C21D1/26C21D1/68C21D8/00C21D6/00
Inventor 郭秋彦陈倩李莉刘强杨安志冯擎峰
Owner ZHEJIANG GEELY AUTOMOBILE RES INST CO LTD
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