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Powder metallurgy hot-forged automobile connecting rod and production process

A production process and technology for automobile connecting rods, which are applied in the manufacturing of automobile connecting rods and the field of powder metallurgy hot forging automobile connecting rods, can solve the problems of complex connecting rod geometry, large machining volume and high manufacturing cost, and increase the solid area. , the effect of improving fatigue life and reducing production costs

Inactive Publication Date: 2004-01-28
长春东北大学粉末冶金有限责任公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Due to the complex geometric shape of the connecting rod, the amount of machining in the production process is large, and the scrap rate is high, so the manufacturing cost is high

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0009] Preparation of master alloy

[0010] Weigh Cu1.5%, Cr1.3%, Mn2.1%, and the balance is iron powder, mix the above raw materials according to the conventional process, smelt, atomize, concentrate, dry, and sieve to make finished products. The temperature is 1650-1700°C.

[0011] After mixing the prepared master alloy with 0.02% S and 0.7% C, perform unidirectional pressing with a unit pressing pressure of 600Mpa, sinter at 1150°C+10°C for 1 hour under the protection of hydrogen, and forge to make a blank. Forging The temperature is 890°C, the forging pressure is 280Mpa, and the reduction is about 15%, and the automobile connecting rod workpiece is made.

Embodiment 2

[0013] Preparation of master alloy

[0014] Weigh Cu3.5%, Cr2.3%, Mn2.1%, and the balance is iron powder, mix the above raw materials according to the conventional process, smelt, atomize, concentrate, dry, and sieve to make finished products. The temperature is 1650~1700℃,

[0015] After mixing the prepared master alloy with 0.03% S and 0.8 C in proportion, perform unidirectional pressing with a unit pressing pressure of 600Mpa, sinter at 1150°C+10°C for 1 hour under the protection of hydrogen, and forge to form a blank. The forging temperature is 890°C, the forging pressure is 280Mpa, and the reduction is about 15%, and the automobile connecting rod workpiece is made.

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Abstract

The invention discloses a kind of powder metallurgy hot wrought car link-lever and the manufacturing craft. The confecting ingredient is Fe-FeYI-S-C serial. The mother alloy particle grade is less than 100 items, the chemical ingredients are: Cu 1.5-4.0%, Cr 1.0-3.0%, Mn 1.1-2.6%. the materials are smelted, atomized, condensed, dried and sifted. The mother alloy is blended with S, C and iron powder according to above proportion, and produces the link. The invention reduces the cost for producing link, and enhances the mechanical performances.

Description

Technical field: [0001] The invention relates to a manufacturing method of an automobile connecting rod, in particular discloses a powder metallurgy hot forging automobile connecting rod, and also provides the production process thereof, belonging to the technical field of powder metallurgy hot forging manufacturing technology of an automobile connecting rod. Background technique: [0002] The engine is the heart of the car, and the connecting rod is an important part of the engine. The conventional production method is to use alloy steel castings to be machined into engine connecting rods after forging process. Due to the complex geometric shape of the connecting rod, the amount of mechanical processing in the production process is large, and the scrap rate is high, so the manufacturing cost is high. Invention content: [0003] The invention discloses a powder metallurgy hot forging automobile connecting rod, and at the same time provides its production process, reduces ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B22F3/17C22C38/02C22C38/18
Inventor 孙旭东丁爱民
Owner 长春东北大学粉末冶金有限责任公司
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