研究了黄河砂冲击下水轮机用20SiMn钢和OCr13Ni5Mo钢冲蚀攻角效应.结果表明:冲蚀分为孕育期、增加期和稳定期三个过程;低攻角"增重"小于大攻角;攻角增加,冲蚀率增大.水轮机用钢冲蚀攻角效应奇异性与黄河砂冲击下"变形冲蚀"、"切削"和"二次冲蚀"的相对作用大小有关.
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