Spalling was a major form of contact fatigue failures in nitridingsteel.
氮化钢的主要接触疲劳破坏形式是剥落。
2
The result shows that the argon gas can effectively decrease the hardness gradient and improve the thermal fatigue behavior of ion nitridingsteel H13.
结果表明：氩气能有效降低渗层的硬度梯度，提高离子渗氮h 13钢的热疲劳性能。
3
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.