Wheel hardness is an important factor relating to grinding effect. Many of its measuring methods have been recently researched.
砂轮硬度是直接影响磨削效果的一个重要因素，因而对于砂轮硬度的测定方法研究颇多。
When the granularity or hardness of the grinding wheel increases, the hardened layer depth increases.
随着砂轮粒度或砂轮硬度的提高，磨削淬硬层深度相应增加。
The wear rate of rail steel increases linearly with the hardness of the corresponding wheel steel rising.
钢轨材料的磨损率随对应车轮硬度的增加而增加，且近似呈线性关系。
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