Wear is one of the three practical failure forms in steel materials, and annual economical lost caused by wear failure is quite large, according to figures released by U.S., economic lost due to wear failure was high as much as 100 billion dollars annually. In the former Soviet Union, economical lost caused by wear was also quit large. While China was still a lack of comprehensive statistics, because our wear-resistant properties of workpieces is poorer compearing with the developed countries’, wear...