Study on heat treatment of rolling bearing and wear resistance of mining roller bit

Confirm different carbon contents and different quenching hardness for the mining roller bits with 20CrNiMo steel,and the different roller bits are arranged to carry out the rolling abrasion tests with SSSiMoV steel rollers,which have different quenching hardness.The orthogonal test obtains primary and secondary factors influencing wear resistance and the optimized heat-treatment index,and analyzes surface wear features.The results show that the primary and secondary factors influencing wear resistance are separately quenching hardness of 55SiMoV steels,quenching hardness qf 20CrNiMo steel and surface carbon content of 20CrNiMo steel,and the optimization parameters are 0.85% surface carbon content and 61.3 HRC quenching hardness of 20CrNiMo steel and 59.9HRC quenching hardness of 55SiMoV steel.According to this,the paper proposes the application heat-treatment indicating range.