Low-Energy Multi-Impact Fracture Resistance of Cross Rolled Low Chromium Cast Semi-Steel Containing Rare Earth Grinding Ball

The low-energy multi-impact fracture resistance of the cross rolled low chromium cast semi-steel containing RE grinding balls was studied. Moreover, its damage mode was analyzed by means of metallographic examination, scanning electron microscopic examination and drop ball test. The results show that it can obtain extractive impact fracture resistance after proper heat treatment. More advantages were obtained for the ball worked in the condition of low-imp ductility act. The main reasons are the function of RE and the change in morphology of eutectic carbide network.

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.

Mechanical Property of Low Chromium Semi-Steel Grinding Ball Prepared by Cross Rolling

The preparing method,rolling technology and mechanical properties of low chromium semi-steel grinding ball by cross rolling were studied.The results show that when the low chromium semi-steel bar is forged from55mm to50mm,cross-rolled into grinding ball at 1 000-1 050℃,air cooled and tempered at 550℃for 2h,the best mechanical properties,especially the abrasive resistance under the action of hard abrasive,can be obtained.

斜轧低铬白口铸铁磨球工艺试验

研究了斜轧低铬白口铸铁磨球的制坯方法，轧制工艺及轧后余热热处理工艺。结果表明，最佳的制球工艺为，将经过一次小量预变形的金属型棒料，在1000～1050℃于较松的孔型中轧制成球，轧后在SST101介质中冷却，200～350℃回火。

余热热处理对斜轧低铬白口铸铁磨球耐磨性的影响

通过冲击磨损试验 ,测试了斜轧低铬白口铸铁磨球的耐磨性 ,并对其磨损面特征进行了分析。结果表明

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 。