Effect of heat treatment process on impact wear property and mechanism of SKD11 steel |
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| Authors: | LIU Chang- hua SUN Guo- dong XIONG L��e YANG Xian- qi |
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| Affiliation: | 1.School of Mechanical and Materials Engineering, Jiujiang University, Jiujiang 332005, Jiangxi, China ;2.Surface Green Remanufacturing Engineering Technology Center of Jiangxi Province, Jiujiang University, Jiujiang 332005, Jiangxi, China |
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| Abstract: | The microstructure, mechanical property, phase of SKD11 steel after vacuum heat treatmentor deep cryogenic heat treatment were studied by means of OM, hardness tester, impact tester and XRD.The impact wear properties of SKD11 steel under the two heat treatments were tested by MLD- 10 dynamic load- bearing wear tester. The impact wear mechanism was also analyzed. The results show that the microstructures of SKD11 steel after the two heat treatmentsare composed of tempering martensite, retained austenite and carbide. The hardness after cryogenic treatment is 1HRC higher than that of the vacuum treatment and impact toughness decreases lightly. Under impact wear conditions, the weight loss of the sample during deep cryogenic treatment is lower than that of the vacuum treatment, which shows better wear resistance. In the studied wear time, the wear mechanism of the sample after vacuum treatment is high stress surface fatigue and abrasive wear, and the wear mechanism of the sample after cryogenic treatment is slight abrasive wear. |
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| Keywords: | SKD11 steel vacuum heat treat deep cryogenic heat treat impact and wear carbide |
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