Nitriding develops extreme hardness in the surface of steel. This hardness ranges from 900 to 1,100 Brinell, which is considerably higher than that obtained by ordinary case hardening.
渗氮在钢表面获得远远超出正常标准的硬度。其硬度范围为900到1,100布氏硬度，这远高于普通表面硬化所获得的硬度。
Grinding hardening, the technology of hardening steel piece surface with grinding heat instead of high or medium frequency induction hardening heat, can integrate grinding surface hardening.
磨削强化处理技术是利用磨削热替代高、中频感应淬火热源对钢件表层进行强化处理，将磨削加工与表面强化合为一体。
This paper reviews the steel grades for the quenching - tempering and surface - hardening gears.
介绍了国内外调质表面淬火齿轮用钢的情况。
Derusting, oxide skin removing and surface hardening for copper castings, sheet metal, stainless steel strips, aluminum castings.
铜合金铸件，薄板、不锈钢带、铝合金铸件除锈、除氧化皮及表面强化。
The surface hardening of 40cr steel was performed on a surface grinder by transverse feed grinding; the changing trends of microstructure and wear behavior of surface hardened layer were researched.
在平面磨床上对非淬硬钢进行了磨削硬化处理，研究了磨削方式和冷却条件对表面硬化层的影响。
The surface hardening of 40cr steel was performed on a surface grinder by transverse feed grinding; the changing trends of microstructure and wear behavior of surface hardened layer were researched.
在平面磨床上对非淬硬钢进行了磨削硬化处理，研究了磨削方式和冷却条件对表面硬化层的影响。
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