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A kind of manufacturing method of seamless steel pipe for shock absorber

A technology of seamless steel pipes and manufacturing methods, which is applied in the field of manufacturing special steel pipes for motorcycle shock absorber struts, can solve the problems of lack of high toughness, potential safety hazards of motor vehicle use, and easy cracking of steel pipes, and improve technical performance and service life, and the effect of reducing driving safety accidents

Inactive Publication Date: 2017-01-11
泰州双马节能科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] At present, most of the existing motorcycle shock absorber struts are made of 45# carbon structural steel, and steel pipes with high strength and tensile strength of 750-830 Mpa are obtained after cold working and deformation. The tensile strength of the seam steel pipe is ≥750 Mpa, and the elongation of the steel pipe is ≥4%. Although it reaches a certain standard, the elongation index is ≥4% according to the national standard (GB / T3639-2008). Toughness, steel pipes are prone to cracking during processing, and are prone to breakage due to steel fatigue and impact during driving, causing personal casualties and other accidents, and there are great hidden dangers to the safety of motor vehicles

Method used

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  • A kind of manufacturing method of seamless steel pipe for shock absorber

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Embodiment 1

[0025] The invention discloses a method for manufacturing a seamless steel pipe for a shock absorber, which consists of C: 0.35%, Si: 0.17%, Mn: 1.15%, P: ≤0.030%, S: ≤0.025%, and the rest is the percentage content of iron components Composition, the method includes the steps of:

[0026] Step 1: batching, tube forming;

[0027] The above ingredients are taken out for batching, put into the pipe making mold, and undergo heat processing and cooling to form a solid structure of round steel billet;

[0028] Step 2: Forming treatment;

[0029] The round steel billet is cut and sheared with a cutting device, processed into a billet of 0.8-1.2m, and transported to the heating furnace through the conveying platform for full heating, because the Mn content in the steel pipe is 1.15, and the percentage between Mn and C is 3:1, it has strong sensitivity when heating perforation, and the heating temperature should be controlled within the range of 1220°C. The heating device adopts a co...

Embodiment 2

[0044] A method for manufacturing seamless steel pipes for shock absorbers, which consists of C: 0.40%, Si: 0.35%, Mn: 1.35%, P: ≤0.030%, S: ≤0.025%, and the rest is iron. The method includes the following steps:

[0045] Step 1: batching, tube forming;

[0046] Take out the above-mentioned ingredients for batching, put them into the pipe-making mold, and undergo smelting, thermal processing, and cooling to form a solid structure of the round pipe billet;

[0047] Step 2: Forming treatment;

[0048] Cut the round steel billet with a cutting device, process it into a billet of 0.8-1.2m, and transport it to the heating device for full heating through the conveying platform. Because the Mn content in the steel pipe is 1.35%, the percentage between Mn and C It is 3:1, it has strong sensitivity when heating perforation, and the heating temperature should be controlled within the range of 1230°C. The heating device adopts a computer automatic temperature closed-loop control system...

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Abstract

The invention relates to a method for manufacturing seamless steel pipes for shock absorbers. The seamless steel pipes comprise 0.35-0.40% of C, 0.17-0.35% of Si, 1.15-1.35% of Mn, lower than or equal to 0.030% of P and lower than or equal to 0.025% of S. The method includes ingredient forming, forming processing, cold drawing processing, secondary heat treatment, acid pickling, cold rolling processing and third-program testing. The method has the advantages that the tensile strength of the seamless steel pipes manufactured by the method is higher than or equal to 900Mpa / cm<2>, the extensibility of the steel pipes is higher than or equal to 10%, and technical requirements on the strength and the toughness of the special steel pipes for slide columns of the shock absorbers of motorcycles can be met; the technical performance of motor vehicles can be improved, the service lives of the motor vehicles can be prolonged, and traffic safety accidents can be reduced.

Description

technical field [0001] The invention relates to a method for manufacturing a seamless steel pipe, in particular to a method for manufacturing a special steel pipe for a motorcycle shock absorber sliding column. Background technique [0002] At present, most of the existing motorcycle shock absorber struts are made of 45# carbon structural steel, and steel pipes with high strength and tensile strength of 750-830 Mpa are obtained after cold working and deformation. The tensile strength of the seam steel pipe is ≥750 Mpa, and the elongation of the steel pipe is ≥4%. Although it reaches a certain standard, the elongation index is ≥4% according to the national standard (GB / T3639-2008). Toughness, steel pipes are prone to cracking during processing, and are prone to breakage due to steel fatigue and impact during driving, resulting in personal casualties and other accidents, which have great hidden dangers to the safety of motor vehicles. Contents of the invention [0003] The ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B23P15/00
CPCB21C37/06C22C38/04
Inventor 卞再明卞再祥黄卫国高松山
Owner 泰州双马节能科技有限公司
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