Properties of Cross-Rolled Low Alloy White Cast Iron Grinding Ball

The low-energy, multi-impact fracture resistance and the abrasiveness of the cross-rolled low alloy white cast iron grinding balls were studied after heat treatments at residual rolling temperature. Moreover, the means by which they are damaged and characters of the wear surface were analyzed. The results show that high resistance to impact fracture and high abrasiveness can be achieved after appropriate heat treatment at residual rolling temperature. This kind of heat treatment technology has several advantages under low impact and hard abrasive. These results are very useful for determining the optimized heat treatment technology at residual rolling temperatures.

锻造白口铁磨球抵抗多冲破坏能力的研究

利用落球试验方法研究了锻造白口铁磨球在多次冲击条件下的破坏行为,并利用赫兹理论及残余应力理论揭示了其破坏机理。所得结果对于促进锻造白口铁的推广应用具有重要意义。

提高高铬白口铸铁磨球冲击抗力的技术关键

当高铬白口铸铁含铬量为18%～28%,Cr/C值是8￣9,铸铁的显微组织是回火马氏体+少量残余奥氏体(<5%)+M7C3碳化物,则磨球具有高的冲击韧性和断裂韧性K1C,具有高的冲击抗力,表现出低的冲击剥落量。

改善低合金抗磨铸铁磨球抗多频次冲击破坏能力的研究

针对抗磨铸铁磨球开裂倾向大的问题,通过落球试验测试了低合金抗磨铸铁磨球抗多频次冲击破坏能力,并借助光学显微镜和扫描电镜对其组织及断口进行了分析。结果表明,稀土变质能提高低合金抗磨铸铁磨球抗多频次冲击破坏能力,稀土变质后再经适当的热处理效果更显著。

斜轧低铬白口铁磨球的抗多冲击破坏能力与耐磨性

通过落球和冲击磨损试验 ,测试了斜轧低铬白口铁磨球的抗小能量多冲击破坏能力和耐磨性 ,并对其破坏形式和磨损面特征进行了分析。结果表明 ,该球经适当的余热热处理可获得较高的抗多冲击破坏能力与耐磨性能。

轧后余热热处理对斜轧低铬白口铁磨球抗多冲击破坏能力的影响

通过落球试验 ,测试了斜轧低铬白口铁磨球的抗小能量多冲击破坏能力 ,并对其破坏形式和磨损面特征进行了分析。结果表明 。