A strategy of avoiding delayed fracture in ultrahigh strength automotive steels by Nb microalloying

摘要：

Recently the automotive industry has been confronted with the phenomenon of delayed fracture. This phenomenon was not relevant in earlier years smce the strength level of the steels was generally below a critical level.However, delayed fracture is not necessarily related to an absolute strength value but rather to microstructural features as well as pre-existing micro-damage in the material that are likely to occur in ultrahigh strength steels. Niobium microalloying in combination with appropriate processing can effectively help to improve the resistance against delayed fracturing in such steels. The paper outlines a strategy how to achieve this based on microstructural control and hydrogen trapping.

关键词： delayed fracture niobium microalloying grain refinement hydrogen trapping,molybdenum alloying

作者: Hardy Mohrbacher

作者单位: NiobelCon bvba,2970 Schilde,Belgium

会议类型: 国际会议

会议名称: The 6th International Conference on High Strength Low Alloy Steels(第六届高强度低合金钢国际会议HSLA Steels2011)

会议地点: 北京

会议语种:英文

页码: 169-172

在线出版日期: 2011-05-31（万方平台首次上网日期，不代表论文的发表时间）