Powder forging method for forklift engine connecting rod

An engine connecting rod and powder forging technology, applied in the field of powder forging, can solve the problems of large gas power consumption, high labor intensity of employees, low forging efficiency, etc., and achieve the effects of high production efficiency, low production cost, and high forging precision.

Inactive Publication Date: 2016-10-05
安徽蓝博旺机械集团精密液压件有限责任公司
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  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The traditional ordinary forging process and mechanical processing method have many shortcomings such as high fire consumption, large gas and electric energy consumption, long forging time, low forging efficiency, high labor intensity of employees, and poor forging precision. It is difficult to meet the requirements of today's forklift engine connecting rod Requirements for high quality, high performance, high efficiency, high precision, low consumption and low cost

Method used

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Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0024] A powder forging method for a forklift engine connecting rod, comprising the following steps:

[0025] a. Ingredients and mixes

[0026] Weigh 30CrMoNi alloy steel powder, 20MnVB alloy steel powder and zirconium carbide powder according to the mass ratio of 9:3:1. After weighing the powder accurately, place it in the mixer and mix for 25 minutes until the distribution is even;

[0027] The chemical composition mass percentage of the above 30CrMoN alloy steel is: C 0.28-0.31%, Si 0.05-0.08%, Mn0.4-0.6%, Cr 1.2-1.4%, Mo 1.0-1.2%, Ni 0.5-0.7%, P≤ 0.005%, S ≤0.005%, the balance is Fe and unavoidable impurities;

[0028] The mass percentage of chemical composition of the above 20MnVB alloy steel is: C 0.18-0.22%, Si 0.22-0.34%, Mn 1.1-1.4%, V 0.08-0.11%, B 0.002-0.003%, P≤0.02%, S≤0.01% , the balance is Fe and unavoidable inclusions;

[0029] b. to suppress

[0030] Put the above mixed powder into the press and press it into the connecting rod preform, the pressing press...

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Abstract

The invention discloses a powder forging method for a forklift engine connecting rod. The powder forging method comprises the steps of material dosing and blending, pressing, sintering, forging, heat treatment, surface stress shot peening treatment and the like. Compared with an ordinary forging technology, the connecting rod manufactured from the three kinds of powder including 30CrMoNi alloy steel powder, 20MnVB alloy steel powder and zirconium carbide powder at a certain proportion through the powder forging method is excellent in high-temperature strength, impact resistance, tenacity and abrasion resistance. Meanwhile, the powder forging method for the forklift engine connecting rod has the beneficial effects of being high in forming property, forging precision, material utilization rate and production efficiency, low in production cost and the like and is suitable for industrial large-scale production.

Description

technical field [0001] The invention relates to a powder forging method for a connecting rod of a forklift engine, belonging to the technical field of powder forging. Background technique [0002] The forklift engine connecting rod is a typical dynamic load part that bears strong impact and the highest dynamic stress. In operation, the connecting rod not only bears the pressure generated by the combustion chamber gas, but also bears longitudinal and lateral inertial forces. Therefore, the connecting rod works under a complex stress state. It is subject to both alternating tension and compression stress and bending stress. The working conditions of the connecting rod require the connecting rod to have high strength and fatigue resistance; it also requires sufficient rigidity and toughness. [0003] The traditional ordinary forging process and mechanical processing method have many shortcomings such as high fire consumption, large gas and electric energy consumption, long fo...

Claims

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Application Information

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IPC IPC(8): B22F3/17B22F3/10B22F3/02B22F3/24B22F5/00B22F1/00C22C38/02C22C38/04C22C38/18C22C38/12C22C38/08
CPCB22F1/0003B22F3/02B22F3/101B22F3/17B22F3/24B22F5/008B22F2003/248B22F2998/10C22C38/02C22C38/04C22C38/08C22C38/12C22C38/18C22C38/32
Inventor吕青堂陈栋李文宇
Owner安徽蓝博旺机械集团精密液压件有限责任公司