Open AccessJournal Article
Effect of heat treatment processes on microstructure and hardness of GCr18Mo steel
TLDR
In this paper, the microscopic structure and hardness of GCr18Mo steels were analyzed and compared under different heat treatment processes, and it was found that the hardness value of gCr18mo steels quenched at 930 ℃ and tempered at 180℃ is lower than gCr 18Mo steel quenching at 860 Ω and tempered by 220 ℩.Abstract:
The heat treatment of quenching,tempering and isothermal quenching process was used on GCr18Mo steel.Meanwhile,the microscopic structure and the hardness value of GCr18Mo steels were analyzed and compared under different heat treatment processes.It is found that the hardness value of GCr18Mo steels quenched at 930 ℃ and tempered at 180 ℃ is lower than GCr18Mo steels quenched at 860 ℃and tempered at 220 ℃.The microscopic structures in both heat treatment proesses are tempering martensite+carbide+residual austenite.Volume fraction of lower bainite increase gradually with the extension of isothermal time,whose structure pattern changes from acerose to hassock stack.The hardness value of GCr18Mo steels austenitized at 930 ℃ and isothermally quenched at 230 ℃ for 130 minutes are lower than GCr18Mo steels austenitized at 870 ℃ and isothermally quenched at 230 ℃ for 30 minutes.read more
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Hardness Analysis of Bearing on Heat Treatment Process
TL;DR: Hardness testing of the outer and inner ring of the bearing is performed after the Heat Treatment process as discussed by the authors. But, the results of the hardness test are in accordance with the factory standard, and therefore, the inner and outer ring meet the manufacturer's quality requirements.
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Hardness Analysis of Bearing on Heat Treatment Process
TL;DR: Hardness testing of the outer and inner ring of the bearing is performed after the Heat Treatment process as discussed by the authors. But, the results of the hardness test are in accordance with the factory standard, and therefore, the inner and outer ring meet the manufacturer's quality requirements.