High heat treatmentperformance of roller sleeve (1), uniform hardness, reasonable hardness gradient, thus ensure the long service life of inlaid backup roller.
辊套(1)的热处理性能好，硬度均匀，硬度梯度从表面层向芯部下降梯度小。因此镶套支承辊的使用寿命长。
2
The relationship between community distribution of ammonium oxidizing bacteria and the removal rate of NH4-N is meaningful to improve the treatmentperformance of CRI.
So it is meaningful to further study its heat treatmentperformance by process test, so that the heat treatment process standard is established to meet special requirement.