Strain aging of new-type Mn-Ni low temperature steel
LI Heng-kun1， SUN Xin-jun2， ZHAO Bo-jie1， CUI Qiang1， ZHANG Xiao-xue1
（1. Research Institute， Nanjing Iron and Steel Co.， Ltd.， Nanjing 210035， Jiangsu， China 2. Institute of Structural Steels， Central Iron and Steel Research Institute， Beijing 100081， China）
Abstract：In order to promote the industrial application of new-type Mn-Ni low temperature steel better，the strain aging sensibility of New-type Mn-Ni low temperature steel is determined by Charpy impact method. The reverted austenite evolution during strain aging is investigated by optical microscopy，transmission electron microscopy （TEM） and X ray diffraction （XRD）. Research results show that，after 5% strain aging，the strain aging sensitivity of the steel is low and the low temperature toughness of the steel is better，the charpy impact energy at －120 ℃ is still above 100 J. The amount of the reverted austenite in the steel is reduced to 9.8%，as some bulk unstable reverted austenite transforms into martensite under the stress.
李恒坤，孙新军，赵柏杰，崔 强，张晓雪. 新型锰镍系低温钢应变时效行为研究[J]. , 2018, 53(4): 74-77.
LI Heng-kun， SUN Xin-jun， ZHAO Bo-jie， CUI Qiang， ZHANG Xiao-xue. Strain aging of new-type Mn-Ni low temperature steel. Iron and Steel, 2018, 53(4): 74-77.
2018, Vol. 53 
