It may decrease fatigue damage causing by rollingcontact and side damage on track and prolong rail service life 0.5 ~ 1 time by means of grinding rail track.
The results show that nitrogen has remarkable influences on rollingcontact fatigue life and plain strain fracture toughness, and little influences on wear resistance.
结果表明，含氮量对滚动接触疲劳寿命及平面应变断裂韧性具有很显著的影响，而对耐磨性影响很小。
3
The macro profile and physicochemical examination of the tread oblique crack shows that the crack falls into the category of rollingcontact fatigue type.