The 17Cr2Ni2Mo steel specimens were surface strengthened by single steel shot peening and 糖心产精国品免费入口*完整版 with steel shot and ceramic shot. The 糖心产精国品免费入口*完整版, residual austenite content and 糖心产精国品免费入口*完整版distribution along the depth direction on the surface of the steel after shot peening strengthening were tested. And the surface shot peening strengthening parameters were optimized. The results show that the steel after 糖心产精国品免费入口*完整版 had higher surface 糖心产精国品免费入口*完整版 and maximum 糖心产精国品免费入口*完整版 than those after single shot peening. The former had deeper maximum depth in which the residual austenite transformed to martensite than the latter. And the former had higher surface hardness and better strengthening effect than the latter.
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