Seamless steel pipe for automobile steering device connecting rod, and preparation method thereof

A technology of automobile steering gear and seamless steel pipe, applied in the direction of pipe/pipe joint/pipe fitting, pipe, rigid pipe, etc., can solve the problems of low fatigue resistance, torsion resistance and shock resistance, and achieve excellent fatigue resistance, The effect of saving processing time and resources

Inactive Publication Date: 2018-11-06
ZHANGJIAGANG FREE TRADE ZONE HENGLONG STEEL TUBE
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] Technical problem to be solved: Aiming at the disadvantages of low fatigue resistance, torsion resistance and shock resistance of existing automobile steering gear connecting rods, the present invention provides a seamless steel pipe for automobile steering gear connecting rods and a preparation method thereof. The connecting rod has excellent fatigue resistance, torsion resistance and shock resistance

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0018] A method for preparing a seamless steel pipe for an automobile steering gear connecting rod, the preparation steps of the method are as follows:

[0019] (1) Smelting of tube blanks: the smelted tube blanks consist of C: 0.038 parts, Si: 0.02 parts, Mn: 0.45 parts, W: 0.65 parts, S: 0.01 parts, Al: 0.058 parts, V: 0.032 parts, Cu: 0.007 parts, Zr: 0.002 parts, Fe: 86 parts of these chemical components;

[0020] (2) Rolling of steel pipes: rolling the tube blanks into seamless steel pipes, the finish rolling temperature is 1200°C;

[0021] (3) Heat treatment of seamless steel pipes: the tempering temperature is 800°C, the heating time is 20min, and then tempered and air-cooled, and sizing and heat straightening are adopted at a high temperature of 500°C to obtain seamless steel pipes for automobile steering gear connecting rods .

Embodiment 2

[0023] A method for preparing a seamless steel pipe for an automobile steering gear connecting rod, the preparation steps of the method are as follows:

[0024] (1) Smelting of tube blanks: the smelted tube blanks are composed of C: 0.048 parts, Si: 0.03 parts, Mn: 0.72 parts, W: 1.05 parts, S: 0.03 parts, Al: 0.083 parts, V: 0.05 parts, Cu: 0.015 parts, Zr: 0.005 parts, Fe: 108 parts of these chemical components; rolling of steel pipes:

[0025] (2) Rolling the tube billet into a seamless steel tube, the finish rolling temperature is 1250°C;

[0026] (3) Heat treatment of seamless steel pipes: the tempering temperature is 900°C, the heating time is 60min, then tempered and air-cooled, and 680°C high temperature sizing and heat straightening are used to obtain seamless steel pipes for automobile steering gear connecting rods .

Embodiment 3

[0028] A method for preparing a seamless steel pipe for an automobile steering gear connecting rod, the preparation steps of the method are as follows:

[0029] (1) Smelting of tube blanks: the smelted tube blanks consist of C: 0.042 parts, Si: 0.023 parts, Mn: 0.55 parts, W: 0.78 parts, S: 0.016 parts, Al: 0.068 parts, V: 0.038 parts, Cu: 0.009 parts, Zr: 0.003 parts, Fe: 90 parts of these chemical components;

[0030] (2) Rolling of steel pipes: rolling the tube blanks into seamless steel pipes, the finish rolling temperature is 1220°C;

[0031] (3) Heat treatment of seamless steel pipes: the tempering temperature is 850°C, the heating time is 40min, and then tempered and air-cooled, and 600°C high-temperature sizing and heat straightening are used to obtain seamless steel pipes for automobile steering gear connecting rods .

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PUM

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Abstract

The invention relates to a seamless steel pipe for an automobile steering device connecting rod, and a preparation method thereof. The seamless steel pipe comprises the following components of, in parts by mass, 0.038-0.048 parts of C, 0.02-0.03 parts of Si, 0.45-0.72 parts of Mn, 0.65-1.05 parts of W, 0.01-0.03 parts of S, 0.058-0.083 parts of Al, 0.032-0.05 parts of V, 0.007-0.015 parts of Cu, 0.002-0.005 parts of Zr and 86-108 parts of Fe. The connecting rod prepared by the seamless steel pipe has the characteristics of good seamless steel pipe yield strength, tensile property, impact property and the like, and additionally, the connecting rod has the excellent fatigue resistance, torsion resistance and anti-seismic property, so that the service life of the connecting rod is prolonged;and when the seamless steel pipe is used for manufacturing an automobile connecting rod, materials are saved, machining hours are saved, and more resources are saved.

Description

technical field [0001] The invention relates to the technical field of seamless steel pipes, in particular to a seamless steel pipe for a connecting rod of an automobile steering gear and a preparation method thereof. Background technique [0002] Automobile steering gear is the most important part in automobile steering system, its function is to increase the force transmitted from the steering wheel to the steering transmission mechanism and change the direction of force transmission. The connecting rod of the automobile steering gear is also an important part in the steering system of the automobile and is indispensable. Therefore, the material used to make the connecting rod is also very important. [0003] At present, most of the materials used to make automobile connecting rods on the market are steel, and very few are composite materials, but composite materials have not been widely used. Seamless steel pipes are widely used in the manufacture of structural parts and...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C38/02C22C38/04C22C38/12C22C38/06C22C38/16C22C38/14C21D8/10F16L9/02
Inventor 程锡铭
Owner ZHANGJIAGANG FREE TRADE ZONE HENGLONG STEEL TUBE
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