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Forging method for automotive eccentric shaft

A technology of eccentric shafts and automobiles, which is applied in the direction of manufacturing tools, furnace types, furnaces, etc., can solve problems such as poor corrosion resistance, short service life, and potential safety hazards, and achieve reduced energy consumption, reduced power consumption, and improved mechanical properties. Effect

Inactive Publication Date: 2014-06-11
MAANSHAN HENGYI MACHINERY MFG
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

General manufacturers in the industry just spray the anti-rust paint directly or without shot blasting during surface treatment, and then paint the black paint after the anti-rust paint is dry. This kind of coating has poor corrosion resistance, short service life, and potential safety hazards.

Method used

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Embodiment Construction

[0023] A method for forging an automobile eccentric shaft, comprising the following steps:

[0024] a. Pouring cylindrical billet step

[0025] The weight percentage of the chemical composition in the cylindrical blank is: C 0.35-0.45%, Mn 1.2-2.6%, Si 0.6-1.5%, Cr 0.2-2.0%, W 0.22-0.37%, Cu 0.14-0.32%, P≤0.043% , S≤0.030%, the balance is Fe and unavoidable inclusions; the temperature of the cast body is reduced to 150°C, then heated to 500-660°C, kept for 3-5 hours, cooled to 100°C, kept for 4 hour, then heated to 550-660°C, kept warm for 3-5 hours, cooled to 300°C at 25°C / hour, then cooled to room temperature at 20°C / hour;

[0026] b. Forging steps

[0027] Put the step blank into an intermediate frequency heating furnace for heating. The initial forging and final forging temperatures are 800°C and 1100°C respectively. After cooling to 500°C, reheat to 900°C, oil cool to 150°C, and then heat to 600-700°C , keep warm for 3 hours, and then water-cooled; after hot forging, t...

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Abstract

The invention discloses a forging method for an automotive eccentric shaft. The forging method comprises the following steps that a cylindrical blank is poured, wherein the cylindrical blank contains the following chemical compositions in percentage by weight: 0.35-0.45% of C, 1.2-2.6% of Mn, 0.6-1.5% of Si, 0.2-2.0% of Cr, 0.22-0.37% of W, 0.14-0.32% of Cu, P being greater than or equal to 0.043%, S being greater than or equal to 0.030%, and the residual amount of Fe and inevitable impurities; the poured blank body is cooled to the temperature of 150 DEG C and then heated to 500-660 DEG C, the blank body is subjected to heat insulation for 3-5 hours and undergoes furnace cooling to reach 100 DEG C, then the blank body is subjected to heat insulation for 4 hours and heated to 550-660 DEG C, and the blank body is subjected to heat insulation for 3-5 hours and is cooled to 300 DEG C at the speed of 25 DEG C per hour and is cooled to the room temperature at the speed of 20 DEG C per hour. With the forging method, the automotive eccentric shaft is suitable for large batch industrial production, the phenomena of containing impurities and insufficient filling in the forging process are reduced, the mechanical performance of products is further improved, the material consumption is saved, and the mold life of the products is prolonged.

Description

technical field [0001] The invention relates to a forging method of an automobile eccentric shaft. Background technique [0002] As an important part of automobile suspension components, the eccentric shaft can improve the roll angle stiffness of the suspension and adjust the ratio of the front and rear suspension angle stiffnesses to ensure that the car has good driving stability, thereby ensuring the safety, comfort and ride comfort of the car . General manufacturers in the industry just spray the anti-rust paint directly or without shot blasting during the surface treatment, and then paint the black paint after the anti-paint is dry. This kind of coating has poor corrosion resistance, short service life and potential safety hazards. Contents of the invention [0003] The purpose of the present invention is to provide a forging method of an automobile eccentric shaft, which is beneficial to large-scale industrial production, and reduces the phenomenon of contaminati...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B21J5/02C22C38/38C21D1/18C21D9/00
Inventor 章功国王泾文段宗银李纯金陈超王淑妍张少伍王晓芬谢勇
Owner MAANSHAN HENGYI MACHINERY MFG
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