High-strength semi-trailer shaft tube and production method thereof

A production method and technology of automobile shafts, applied in the field of shaft tubes and their production, can solve the problems of insufficient strength and toughness, and achieve the effects of excellent organizational structure, improved comprehensive performance, and good low-temperature plasticity

Inactive Publication Date: 2010-05-12
崔永贵
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The purpose of this invention is to provide a high-strength semi-trailer axle tube and its production method, which solves the disadvantage that the strength and toughness of 45# and 20Mn2 steel cannot meet the requirements for the axle tube

Method used

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Examples

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Comparison scheme
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Embodiment

[0010] 1. The basic metallurgical process is EAF white slag + LFV vacuum degassing

[0011] 1) EAF white residue:

[0012] Furnace materials are made of low S, P machine steel, cut ends and high-quality pig iron; alloys need to prepare low-carbon chromium, low-carbon manganese, molybdenum iron, aluminum ingots, etc.; the reducing agent uses calcium carbide 2-3kg / t, and the amount of carbon powder must be burnt through. , Deoxidation of aluminum powder to keep white slag; decarburization amount ≥ 0.30%, slag amount [C] ≤ 0.04%, but not overoxidation; slag temperature ≥ 1650 ° C with low carbon Fe-Mn to adjust Mn: slag [C] , [P], T℃ meet the requirements and adjust Mn to 0.30%; net boiling time ≥ 5 minutes; insert Al0.8kg / t after slag removal, must use iron rod to insert molten steel; add alloy to the specified range according to the analysis results Inside; tapping temperature 1650±10°C; Al mixed to 0.75%, aluminum ingots are added to the ladle along with the steel flow.

[0...

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PUM

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Abstract

The invention discloses a high-strength semi-trailer shaft tube and a production method thereof. The alloy components of a steel tube contain 0.23 to 0.25 wt% of C, 0.15 to 0.30 wt% of Si, 1.30 to 1.45 wt% of Mnl, no more than 0.030 wt% of P, no more than 0.035 wt% of S, no more than 0.01 wt% of Al, no more than 0.025 wt% of Cu, not more than 0.25 wt% of Ni, no more than 0.25 wt% of Cr, no more than 0.15 wt% of Mo and the balance of ferrum. A sulfur-resistant oil well tube is obtained after billet fabrication, perforation, tube rolling and hot coining are performed on the components as raw materials, wherein the heating temperature is from 1100 to 1300DEG C and the heating time is 55 minutes in the process of perforation; the air cooling is ensured at the tapping temperature higher than 900DEG C after coining in the coining process. The invention overcomes the defect that the strength and toughness of a trailer shaft tube made of 45# and 20Mn2 steel can not meet the requirements.

Description

technical field [0001] The invention relates to a shaft tube used on a semi-trailer and a production method thereof. Background technique [0002] With the rapid development of our country's economy, the development of logistics is also very fast, and the manufacturing industry of semi-trailers is developing rapidly. The strength and toughness of 45# and 20Mn2 steel used for axle tubes cannot meet the requirements. Contents of the invention [0003] The purpose of the present invention is to provide a high-strength semi-trailer axle tube and its production method, which solves the disadvantage that the strength and toughness of 45# and 20Mn2 steel cannot meet the requirements for the axle tube. [0004] Technical scheme of the present invention is as follows: [0005] A high-strength semi-trailer axle tube, characterized in that the alloy composition and content percentage of the steel tube are: C0.23-0.28, Si0.15-0.30, Mn1.30-1.45, P≤0.030, S≤0.035, Al ≤0.01, Cu≤0.025, ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C38/44B23P17/00
Inventor 崔永贵
Owner 崔永贵
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