The Chaling wild abortive type （CL-type） cytoplasmic male sterile line, E-Jing A, was characterized by stable sterility with a sterile plant percentage of 100%, a pollen sterile degree of 98% with dominated typical ...The Chaling wild abortive type （CL-type） cytoplasmic male sterile line, E-Jing A, was characterized by stable sterility with a sterile plant percentage of 100%, a pollen sterile degree of 98% with dominated typical abortive pollens, and showed the characteristics of good outcrossing with a stigma exsertion rate of 48.2% and an outcrossing rate varied from 30% to 50%, good combining ability, and fine grain quality. E-Jing A was sensitive to temperature. Its duration from sowing to heading was 78-90 d when it was sown from mid May to early June at Wuhan. The breeding procedure of E-Jing A and its characteristics, relationship of restoring and maintaining were introduced.展开更多
分析了某公司的2#乙二醇R-120环氧乙烷反应器中C-11环焊缝开裂原因。对开裂C-11环焊缝开展了化学成分、金相观察、硬度测试、断口微观观察、EDS能谱分析等试验研究。试验发现:壳程、管板母材和焊缝金属化学成分分别满足SA543 Type B CL....分析了某公司的2#乙二醇R-120环氧乙烷反应器中C-11环焊缝开裂原因。对开裂C-11环焊缝开展了化学成分、金相观察、硬度测试、断口微观观察、EDS能谱分析等试验研究。试验发现:壳程、管板母材和焊缝金属化学成分分别满足SA543 Type B CL.1,SA508 Gr.4N CL.1和MGS 80的要求;从内壁管板侧热影响区起裂的主裂纹穿晶扩展,裂纹尖端沿晶扩展并有分叉,具有应力腐蚀裂纹特征;内壁附近焊缝两侧热影响区局部有马氏体组织;管板侧热影响区硬度最高为466.3 HV10;断口观察发现裂纹在内壁产生,是多源裂纹,沿壁厚向外壁扩展15 mm,断口上有冰糖状等轴晶和柱状晶;裂纹断口探测到P和Na元素。该反应器开裂原因是由于焊接导致在管板与壳程焊接区域存在较高的残余应力,在高温锅炉水介质中,发生了应力腐蚀开裂,由内壁向外扩展,最终导致泄漏。展开更多
基金Supported by the Great Special Science and Technology Project of Hubei Province during the Eleventh Five-Year Plan(2006AA201A03)~~
文摘The Chaling wild abortive type （CL-type） cytoplasmic male sterile line, E-Jing A, was characterized by stable sterility with a sterile plant percentage of 100%, a pollen sterile degree of 98% with dominated typical abortive pollens, and showed the characteristics of good outcrossing with a stigma exsertion rate of 48.2% and an outcrossing rate varied from 30% to 50%, good combining ability, and fine grain quality. E-Jing A was sensitive to temperature. Its duration from sowing to heading was 78-90 d when it was sown from mid May to early June at Wuhan. The breeding procedure of E-Jing A and its characteristics, relationship of restoring and maintaining were introduced.
文摘分析了某公司的2#乙二醇R-120环氧乙烷反应器中C-11环焊缝开裂原因。对开裂C-11环焊缝开展了化学成分、金相观察、硬度测试、断口微观观察、EDS能谱分析等试验研究。试验发现:壳程、管板母材和焊缝金属化学成分分别满足SA543 Type B CL.1,SA508 Gr.4N CL.1和MGS 80的要求;从内壁管板侧热影响区起裂的主裂纹穿晶扩展,裂纹尖端沿晶扩展并有分叉,具有应力腐蚀裂纹特征;内壁附近焊缝两侧热影响区局部有马氏体组织;管板侧热影响区硬度最高为466.3 HV10;断口观察发现裂纹在内壁产生,是多源裂纹,沿壁厚向外壁扩展15 mm,断口上有冰糖状等轴晶和柱状晶;裂纹断口探测到P和Na元素。该反应器开裂原因是由于焊接导致在管板与壳程焊接区域存在较高的残余应力,在高温锅炉水介质中,发生了应力腐蚀开裂,由内壁向外扩展,最终导致泄漏。
