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Power metallurgy automobile connecting bar and production method thereof

An automobile connecting rod and powder metallurgy technology, applied in the field of powder metallurgy, can solve the problems of complex connecting rod geometry, large machining volume and high manufacturing cost, and achieve the effects of good microstructure, improved fatigue life, and guaranteed vertical and horizontal uniformity.

Inactive Publication Date: 2014-02-05
WUHU HONGKUN AUTO PARTS
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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

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Embodiment Construction

[0016] specific implementation plan

[0017] The present invention will be described in detail below through specific examples.

[0018] A powder metallurgy automobile connecting rod, made of the following raw materials in parts by weight (kg): iron powder 81, yttrium 0.8, graphite 1.8, Ti 4.1, Sr 2.1, Bi 1.0, Ta 0.3, Nd 0.1, additive 2;

[0019] The auxiliary agent is made of the following raw materials in parts by weight (kg): iron powder 30, kaolin 2, alum 1, nano-carbon 1, polyisobutylene 2, aluminate coupling agent DL-411 1, sodium tripolyphosphate 2. Ricinoleic acid 1, aluminum nitride powder 2; the preparation method is to mix iron powder, kaolin, alum, and sodium tripolyphosphate, grind it into 200-300 mesh powder, and then add aluminate coupling agent DL-411 to mix Uniform, pressed into a blank at 10-15Mpa, then sent to 920-950°C for calcination for 3-4 hours, after cooling, crushed into 300-400 mesh powder, mixed with other remaining ingredients, heated to 60-70°C, ...

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Abstract

The invention discloses a power metallurgy automobile connecting bar. The power metallurgy automobile connecting bar is characterized by being made with, by weight, 81-82 parts of iron powder, 0.8-1.2 parts of yttrium, 1.8-2.2 parts of graphite, 4.1-4.5 parts of Ti, 2.1-2.3 parts of Sr, 1.0-1.4 parts of Bi, 0.3-0.5 part of Ta, 0.1-0.3 part of Nd, and 2-3 parts of aid. The aid is added, so that alloy powder disperses evenly, lengthwise and breadthwise uniformity of the inside structure of products is guaranteed, and the fatigue lives of the products are prolonged; the graphite is added, wear resistance and lubricity of the connecting bar are improved, the produced products are compact in structure and good in microstructure, have few pores, and are excellent in structural rigidity, hardness, fatigue resistance and tensile strength.

Description

technical field [0001] The invention relates to the field of powder metallurgy, in particular to a powder metallurgy automobile connecting rod and a preparation method thereof. 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. [0003] Powder metallurgy is an industrial technology for producing metal powder or using metal powder (or a mixture of metal powder and non-metal powder) as raw material, forming and sintering to produce metal materials, composite materials and various types of products. At present, powder metallurgy technology has been widely used in transportation, machi...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B22F5/00B22F1/00B22F3/16C22C38/14
Inventor 黄浩
Owner WUHU HONGKUN AUTO PARTS
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