工程科学学报2016，Vol.38Issue(9)：1257-1263,7.DOI:10.13374/j.issn2095-9389.2016.09.009
原位观察MnS对非调质钢拉伸性能各向异性的影响
In-situ observation of MnS effect on the tensile strength anisotropy of non-quenched and tempered steel
摘要
Abstract
In-situ observation of the behavior of MnS inclusions in non-quenched and tempered steel with a sulfur mass fraction of 0. 065% was performed during tensile tests by using a laser confocal scanning microscope ( LCSM ) to investigate the effects of the morphology and distribution of MnS inclusions on the tensile property anisotropy of the steel. The result shows that there exist a large number of rod-like MnS inclusions in the forged steel, which have different orientations with the load during transverse and longitudinal tensile tests. The rod-like MnS inclusions separate much easier from the steel base during transverse tensile tests to form initial cracks, and then the cracks spread along the MnS inclusions. In this way, the cracks grow up and lead to the fracture of the steel. In contrast, the MnS inclusions have little effects on the longitudinal tensile properties because the length direction of MnS is parallel to the tensile force. MnS inclusion aggregation promotes the assembling and growth of single cracks, thus accelerating the fracture of the steel during tensile tests.关键词
非调质钢/原位观察/硫化锰/拉伸性能/各向异性Key words
non-quenched and tempered steel/in-situ observation/manganese sulfide/tensile properties/anisotropy分类
矿业与冶金引用本文复制引用
李梦龙,王福明,李长荣,陶素芬,孟庆勇..原位观察MnS对非调质钢拉伸性能各向异性的影响[J].工程科学学报,2016,38(9):1257-1263,7.基金项目
国家自然科学基金资助项目(51174020 （）
51374018) （）
国家高技术研究发展计划资助项目(2013AA031601) （2013AA031601）
十三五国家重点研发计划资助项目(2016YFB0300102) （2016YFB0300102）
