机械工程材料
機械工程材料
궤계공정재료
Materials for Mechanical Engineering
2015年
11期
79-82
,共4页
陈吉生%石晶辉%鄂大辛
陳吉生%石晶輝%鄂大辛
진길생%석정휘%악대신
常温蠕变%应力水平%加载速率%1Cr18Ni9Ti钢管
常溫蠕變%應力水平%加載速率%1Cr18Ni9Ti鋼管
상온연변%응력수평%가재속솔%1Cr18Ni9Ti강관
room temperature creep%stress level%loading velocity%1Cr18Ni9Ti steel tube
采用微机控制电子式万能拉伸试验机研究了应力水平、加载速率、加载历史等对1Cr18Ni9Ti钢管常温蠕变性能的影响以及常温蠕变和加载历史对屈服强度的影响。结果表明：钢管的常温蠕变应变随应力水平和加载速率的增大而增大；加载历史使二次常温蠕变应变减小；当钢管经过不同加载过程的常温蠕变后，不动位错密度增加，之后再进行二次拉伸可使屈服强度有所提高。
採用微機控製電子式萬能拉伸試驗機研究瞭應力水平、加載速率、加載歷史等對1Cr18Ni9Ti鋼管常溫蠕變性能的影響以及常溫蠕變和加載歷史對屈服彊度的影響。結果錶明：鋼管的常溫蠕變應變隨應力水平和加載速率的增大而增大；加載歷史使二次常溫蠕變應變減小；噹鋼管經過不同加載過程的常溫蠕變後，不動位錯密度增加，之後再進行二次拉伸可使屈服彊度有所提高。
채용미궤공제전자식만능랍신시험궤연구료응력수평、가재속솔、가재역사등대1Cr18Ni9Ti강관상온연변성능적영향이급상온연변화가재역사대굴복강도적영향。결과표명：강관적상온연변응변수응력수평화가재속솔적증대이증대；가재역사사이차상온연변응변감소；당강관경과불동가재과정적상온연변후，불동위착밀도증가，지후재진행이차랍신가사굴복강도유소제고。
Effects of stress level,loading velocity and loading process on room temperature creep properties of 1Cr18Ni9Ti steel tube and influences of room temperature creep and loading process on yield stress were studied by using microcomputer control electric tensile tester.The results show that room temperature creep strain of the steel tube increased with the increase of stress level and loading velocity.The loading process could decrease the secendary room temperature strain .The density of the fixed dislocation increased after different loading processes were carried on the steel tube,and the subsquent secondary tensile process could raise the yield strength of the steel tube.
