After the depth increased to a certain level, conversion degree decreased more evidently than micro-hardness.
当深度增加至一定水平后，转化度的下降比硬度的下降更为迅速而明显。
2
According to real production case of our country, it is necessary to establish the standard about the conversion tables on hardness and strength of hardened high speed steel.
根据我国具体的生产实际情况，有必要建立我国自己的淬硬高速钢洛氏硬度和维氏硬度换算的标准。
3
The cutting speed can be adjusted by stepless frequency conversion to suit materials in different hardness.