中文摘要：

对比研究了现场不同工艺所得碳锰系车轮用钢及低碳低硅含磷铬系相变诱发塑性（TRIP）钢的力学性能、微观组织、疲劳性能和疲劳断口。结果显示，较传统碳锰系车轮用钢，新型TRIP钢具有相当的屈服强度，抗拉强度明显提高了100~150 MPa，疲劳极限提高了50~140 MPa。疲劳极限随抗拉强度的提高有增大趋势。铁素体、贝氏体、残余奥氏体组织较铁素体、贝氏体、珠光体组织和铁素体、珠光体、马奥岛组织具有更好的疲劳性能。

英文摘要：

The mechanical properties , microstructures , fatigue properties and fatigue fractures of the conventional C-Mn wheel steels and the low-carbon low-silicon phosphorus/chromium-contained transformation induced plasticity（TRIP）steel were investigated. Results revealed that the new-type TRIP steel possessed similar yield strength , tensile strength increased by 100~150 MPa and fatigue limit increased by 50~140 MPa,compared with the conventional C-Mn wheel steels. The fatigue limit increased with the increase of the tensile strength. The steel containing ferrite,bainite and retained austenite had a higher fatigue limit than the steel containing ferrite,bainite and pearlite or steel containing ferrite,pearlite and martensite-austenite islands.