Looking for breakthrough ideas for innovation challenges? Try Patsnap Eureka!

Ultrafine crystal grain semi-trailer axle tube material and processing method of axle tube

A semi-trailer axle and ultra-fine grain technology, which is applied in metal processing equipment, manufacturing tools, rolling mill control devices, etc., can solve the problems of insufficient fatigue resistance performance, difficulty in ensuring the quality of welds, and low strength of steel pipes, etc. , to achieve the effects of excellent comprehensive mechanical properties, excellent organizational structure, and mature production technology

Inactive Publication Date: 2010-11-24
ANHUI TIANDA OIL PIPE
View PDF4 Cites 14 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The rear axle of the container semi-trailer used to be produced by a three-stage process, that is, a thick steel plate of about 25 mm is bent into a square tube and then welded, and the axle head is welded at both ends. The process is complicated and the quality of the weld is difficult to guarantee.
The traditional hot-rolled steel pipe directly enters the cooling bed for cooling after sizing, the strength of the steel pipe is not high, the surface hardness is not enough, the impact toughness is poor, and the fatigue resistance cannot meet the requirements
In the traditional quenching and tempering process, the method of external spraying and internal spraying is adopted. After water quenching and tempering, the strength of the steel pipe can be improved and the surface hardness can be guaranteed. However, the steel pipe grain is coarse, the service life is greatly reduced, and the production cost is greatly increased.

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0023] (1) The weight percentages of the chemical components of the ultra-fine grain semi-trailer axle tube are: C: 0.23-0.28%, Si: 0.15-0.30%, Mn: 1.30-1.45%, P: ≤0.03%, S: ≤0.035%, Al: ≤0.01%, Cu: ≤0.25%, Ni: ≤0.25%, Cr: ≤0.25%, Mo: ≤0.15%, and the rest are iron and impurities; among the impurities are Pb, Sn, As, Sb and The total content of Bi elements≤450PPM, among which, each single element≤100PPM, Pb≤80PPM; the content of H in the impurities is less than 2PPm, the content of O is less than 40PPm, and the content of N is less than 80PPm; the carbon equivalent of the axle tube=C+Mn / 6+(Cr +Mo+V) / 5+(Ni+Cu) / 15×100%, its value is greater than 0.5%.

[0024] (2) The processing method of ultra-fine grain semi-trailer axle tube:

[0025] EAF electric furnace melting and primary smelting: low S and P scrap steel is selected as the furnace material, the axle tube is processed and trimmed and high-quality pig iron is used.

[0026] Alloys need to prepare low-carbon chromium, low-c...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

PropertyMeasurementUnit
fatigue bending timesaaaaaaaaaa
Login to View More

Abstract

The invention discloses an ultrafine crystal grain semi-trailer axle tube material and a processing method of an axle tube. The ultrafine crystal grain semi-trailer axle tube comprises the chemical components by weight percent: 0.23-0.28% of C, 0.15-0.30% of Si, 1.30-1.45% of Mn, less than or equal to 0.03% of P, less than or equal to 0.035% of S, less than or equal to 0.01% of Al, less than or equal to 0.25% of Cu, less than or equal to 0.25% of Ni, less than or equal to 0.25% of Cr, less than or equal to 0.15% of Mo and balance Fe and impurities. By adopting residual heat outer wall atomization and residual heat inner wall tempering technique, the invention guarantees the surface hardness of a steel tube, ensures crystal grains to be ultrafine and the impact toughness to be more superior, greatly improves the strength, guarantees the anti-fatigue property of the ultrafine crystal grain semi-trailer axle tube, greatly prolongs the service life and increases the safety factor.

Description

technical field [0001] The invention relates to the processing field of steel pipes, in particular to an ultrafine grain semi-trailer axle tube material and a processing method for the axle tube. Background technique [0002] With the rapid development of my country's economy, heavy-duty vehicles and logistics industries have developed rapidly. In just six or seven years, the output of heavy-duty vehicles has increased by more than ten times, and now the annual output exceeds 400,000 vehicles. Containers, loading and unloading bridges and semi-trailers, etc., thus creating an increasingly strong demand for steel materials. The rear axles of container semi-trailers used to be produced by a three-stage process, that is, about 25mm thick steel plates were bent into square tubes and then welded, and the axle heads were welded at both ends. The process was complicated and the quality of the welds was difficult to guarantee. The traditional hot-rolled steel pipe directly enters th...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
Patent Type & Authority Applications(China)
IPC IPC(8): C22C38/60C22C38/44B21C37/06B21B19/04B21B37/78
Inventor 张胡明雍金贵张春祥汪义吕黎红张秋生
Owner ANHUI TIANDA OIL PIPE
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Patsnap Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Patsnap Eureka Blog
Learn More
PatSnap group products