The paper provides the mathematical model of numerical simulation for metal surface hardened by plasma-arc with finite element method.

给出了用有限元方法对金属材料等离子体弧金属表面强化处理过程数值模拟的数学模型。

youdao

The depths and its uniformity of the surface hardened layer, its microhardness and wear resistance are further improved under two-passes grinding.

双程磨削淬硬可使表面硬化层深度及其均匀性、显微硬度及耐磨性得到进一步提高；

youdao

In addition, the fatigue life decreases after nitrocarburizing, are because the surface hardened layer leads to the plastic behavior loss of a whole material.

另外，共渗处理疲劳寿命的降低是表面强化层造成整体材料的塑性损失的结果。

youdao

Hydraulic fracturing pumps many thousands of gallons of mainly water and sand, with a few chemicals, at high pressure into tight gas-bearing shale deposits (hardened muds), creating cracks that allow gas to flow back up the well to the surface ( Shale Shock).

FORBES: The Fracking Solution Is A Good Cement Job