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Automobile connection rod and thermal treatment process thereof

A technology of heat treatment process and automobile connecting rod, which is applied in the direction of heat treatment furnace, heat treatment equipment, connecting rod, etc., and can solve the problems of danger in the driving process, high frequency of use, easy wear and fracture, etc.

Inactive Publication Date: 2014-10-08
NINGBO FENGHUA FEITIANREN PRECISION MOLD DESIGN CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] The purpose of this invention is to solve the problem that some existing automobile connecting rods and their heat treatment process are prone to wear and fracture due to their high frequency of use, resulting in dangerous problems during automobile driving

Method used

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  • Automobile connection rod and thermal treatment process thereof

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Embodiment Construction

[0007] Below in conjunction with accompanying drawing and embodiment the present invention will be further described:

[0008] As shown in the figure, the present invention includes a body 1 and a heat treatment process, the body 1 is set as a cylindrical structure, the middle part of its outer ring is set as a round hole, and the winding spring structure 2, its heat treatment process includes its Quenching and tempering at medium temperature are carried out to obtain the tempered troostite structure. The choice of quenching temperature in the process is to ensure sufficient austenitization and maintain finer grains. Grain refinement can significantly improve the spring The impact value of steel, in order to develop high-strength spring steel, carbonitrides of trace alloying elements are added to the steel, which can refine austenite grains during heat treatment, and can also produce precipitation strengthening effects, and finally annealing .

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Abstract

The invention discloses an automobile connection rod and a thermal treatment process thereof. The automobile connection rod comprises a body, wherein the body adopts a cylindrical structure; a circular-hole-shaped wound type spring structure is formed in the middle of the outer ring of the body; the thermal treatment process comprises the following steps of quenching the automobile connection rod and tempering the automobile connection rod under medium temperature, wherein carbonitride with trace alloy elements is added to steel in order to develop high-intensity spring steel, austenite crystals can be thinned in the thermal treatment process, and a deposition enhancement effect can be achieved; and finally performing annealing. By the adding of the carbonitride with the trace alloy elements, the automobile connection rod is high in elasticity limit and yield ratio, high in toughness and high in surface quality.

Description

technical field [0001] The invention relates to a mechanical product, in particular to an automobile connecting rod and its heat treatment process. Background technique [0002] Due to the high frequency of use of some automobile connecting rods on the existing market, they are prone to wear and tear, causing danger during driving. Contents of the invention [0003] The invention provides an automobile connecting rod and its heat treatment process. [0004] The purpose of the present invention is to solve the problem that some existing automobile connecting rods and their heat treatment process are prone to wear and breakage due to high frequency of use, resulting in danger during automobile driving. [0005] The technical solution adopted by the present invention to solve the technical problem is: an automobile connecting rod and its heat treatment process, including the body and the heat treatment process, the body is set as a cylindrical structure, and the middle part ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F16C7/04C21D9/00
Inventor 金方明
Owner NINGBO FENGHUA FEITIANREN PRECISION MOLD DESIGN CO LTD
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