An overall chromium coating improves the corrosion resistance of the generally used through-hardening rolling bearing steel.
一个总铬涂层提高了耐腐蚀性能的普遍使用，通过硬化滚动轴承钢。
2
If a low degree of hardness is satisfactory, through-hardening is probably the most desirable heat treatment process to be used because of its inexpensiveness.
要是对强度的要求较低，群体淬火有可能是最适当的热处理方法，由于它的花费不高。
3
Selenium works synergistically with vitamin E to boost antioxidant power and prevent or slow signs of aging and hardening of tissues through oxidation.