Study of detecting flaws in a heavy bridge-making steel plate
The flaws in a heavy bridge-making steel plate (Q370qE) were detected by ultrasonic test,the types and formation reasons of which were studied by metallographic examination,scanning electron microscope (SEM) and energy dispersive X-ray (EDX) spectrometer.The results showed that the types of the flaws were mainly crack,micropore and inclusion.The formation of crack and micropore was attributed to the center segregation,porosity,as well as the role of structural stress and thermal stress.Moreover,the inclusions were mainly composite oxides (MgO,Al2O3,CaO,etc.) and MnS,the former came from the raw materials and impurity oxides,however,the latter came from the center segregation of the alloying elements.Besides,some improvement measures to reduce detecting flaws were also proposed.
Bridge-making Steel Q370qE Detecting Flaws Crack Micropore Inclusion
Haihe Luo Hanxiong Dong Zhongbo Dong Jun Hong
Research and Development Center of Wuhan Iron and Steel(Group)Corp., Wuhan 430080, China Research and Development Center of Wuhan Iron & Steel Group Echeng Iron & Steel Co.LTD.,Ezhou 436000
国际会议
西安
英文
45-48
2012-08-24（万方平台首次上网日期，不代表论文的发表时间）