A kind of automobile hub alloy steel and its manufacturing process

Abstract

The invention discloses an automobile hub alloy steel and a manufacturing process thereof, which contains chemical element components and mass percentages: 0.08-0.15% carbon, 0.3-0.4% silicon, 0.4-0.7% manganese, and 0.2-0.3% chromium , nickel 0.04-0.06%, molybdenum 0.02-0.05%, niobium 0.08-0.1%, sulfur 0.06-0.07%, phosphorus 0.02-0.03%, and the balance is iron; the present invention improves the composition and content of trace elements in alloy steel, As well as improving the manufacturing process of forging alloy steel, the invention first makes alloy block and then melts and adds alloy elements to make castings, so as to improve the toughness of ultra-high-strength alloy steel forgings and reduce the fatigue strength / resistance of ultra-high-strength alloy steel forgings. The purpose of decreasing the tensile strength ratio and improving the delayed fracture strength of ultra-high-strength alloy steel forgings.

Description

technical field [0001] The invention relates to an alloy steel and a manufacturing method thereof, in particular to a manufacturing process of an automobile hub alloy steel. Background technique [0002] The metal supporting parts of automobiles not only have high requirements on structural strength and function, but also are equally important in mechanical processing. Such requirements not only meet the basic conditions for automobile use, but also guarantee the safety and reliability of extending the service life. [0003] In the prior art, the steel used for the production of auto parts is ordinary low-medium content alloy steel, because these auto metal parts are generally frequent moving parts in terms of function, with high wear rate and frequent replacement, which increases maintenance costs; found It is very important to improve the hardness and wear resistance, and at the same time, the low-medium content alloy steel with high heat resistance on the part surface. ...

AI Technical Summary

Problems solved by technology

[0003] In the prior art, the steel used for the production of auto parts is ordinary low-medium content alloy steel, because these auto metal parts are generally frequent moving parts in terms of function, with high wear rate and frequent replacement, which increases maintenance costs; found It is very important to improve the hardness and wear resistance, and at the same time, the low-medium content alloy steel has high heat resistance on the surface of parts.