检索结果-南通市图书馆

第十届中国钢铁年会暨第六届宝钢学术年会

作者： Zhang Yongjie Miyamoto Goro Shinbo Kunio Furuhara Tadashi Department of Metallurgy Tohoku University Institute for Materials Research Tohoku University

Interphase precipitation is the phenomenon that when steels containing strong carbide-forming elements are transformed from austenite into ferrite, alloy carbides are precipitated in sheets as a result of periodic nucleation at migrating interphase boundary. Nano-sized carbides formed through interphase precipitation are used to strengthen low carbon steels due to its large amount of precipitation strengthening. The effects of transformation temperatures and alloy elements on the hardness of ferrite strengthened by VC interphase precipitation in low carbon steels were investigated in the present study. It is found that when the transformation temperature becomes lower, the transformed microstructure changes from equi-axed grain boundary ferrite into acicular Widmanstatten or bainitic ferrite. Such transition also corresponds to the decrease in hardness at lower transformation temperatures due to the absence of VC interphase precipitation in acicular ferrite as confirmed by three-dimensional atom probe analyses. On the other hand, by lowering the Mn content, the formation of acicular ferrite is promoted while Si addition does not have large influence on the ferrite morphology. In contrast, higher N content suppress the formation of acicular ferrite, especially at lower transformation temperature at which intra-granular ferrite is extensively formed instead. The hardness in different alloys can be well understood qualitatively by considering the morphology of ferrite, indicating that the control of ferrite morphology is extremely important to obtain better mechanical properties with interphase precipitation for industrial use.

关键词： interphase precipitation hardness ferrite morphology alloying element

来源： cnki会议评论

在线全文

cnki会议

学校读者我要写书评

暂无评论

High cycle rotating bending fatigue performance and fracture behavior in a pearlite-ferrite dual-phase steel

引用

Journal of Iron and Steel Research International 2022年第3期29卷 519-528页

作者： Xin-bo Ji Si-xin Zhao Li-ming Fu Jian Peng Jia-qiang Gao Da-jiang Yu Zong-ze Huang Ai-dang Shan School of Materials Science and Engineering Shanghai Jiao Tong UniversityShanghai200240China Baosteel Research Institute Baoshan Iron and Steel Co.Ltd.Shanghai201900China

To clarify the effects of ferrite morphologies and contents on high-cycle fatigue property of pearlite-ferrite dual-phase(DP)steel used for fabrication of commercial vehicle crankshafts,two types of DP steels with different ferrite grain sizes(S10:13.1μm and S30:21.4μm)and ferrite contents(S10:~9.5 vol.%and S30:~30.4 vol.%)were *** amplitude-logarithm of number of high cycles to failure fatigue of the two DP steels was *** results showed a fatigue strength of 510 and 400 MPa for S10 and S30 steels,respectively,at 10^(7) *** cracks in S10 steel extended preferentially along the grain boundary,but it was easy for crack propagation to extend within a pearlite colony to form a zigzag crack *** roughness was enhanced and high stress was introduced to the crack surface due to this kind of crack propagation behavior,which has positive effects on slowing down crack ***,the crack propagation in S30 steel mainly occurred inside the soft equiaxed coarse ferrite *** revealed that little stress was introduced to the crack *** results show that it is possible to improve high cycle fatigue strength of pearlite-ferrite DP steel by appropriately manipulating the volume fraction and microstructure morphology of ferrite phase.

关键词： Pearlite-ferrite steel ferrite morphology ferrite content Fatigue perfomance Fracture characteristics

来源：

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

欢迎您,

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

在线全文

在线全文

请选择保存的检索档案：

请选择收藏分类：

通借通还

欢迎您,

建议与咨询 留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

在线全文

在线全文

请选择保存的检索档案： 新增检索档案 确定 取消

请选择收藏分类： 新增自定义分类 确定 取消

通借通还

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

请选择保存的检索档案：

请选择收藏分类：