共查询到20条相似文献,搜索用时 15 毫秒
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Effect of Heat Treatment on Delayed Fracture Resistance of High Strength Steel 30CrMnSi2NiNb 总被引:1,自引:1,他引:0
Thedelayedfractureisoneofthemostimpor tantfailuremodesforhighstrengthsteelsappliedtoheavydutymachinecomponentssuchashighstrengthbolts[1] .Inpreviousinvestigations ,itwasshownthatthedelayedfractureresistanceofhighstrengthsteelisintensivelydependentonitsch… 相似文献
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NIE Yi-hong HUI Wei-jun FU Wan-tang WENG Yu-qing 《钢铁研究学报(英文版)》2007,14(6):53-57,67
The delayed fracture behavior of medium-carbon high strength spring steel containing different amounts of boron (0.000 5%, 0.001 6%) was studied using sustained load delayed fracture test. The results show that delayed fracture resistance of boron containing steels is higher than that of conventional steel 60Si2MnA at the same strength level and it increases with the increase of boron content from 0.000 5% to 0.001 6%. The delayed fracture mode is mainly intergranular in the boron containing steels tempered at 350 ℃, which indicates that the addition of boron does not change the fracture character. However, the increase of boron content enlarges the size of the crack initiation area. Further study of phase analysis indicates that most boron is in solid solution, and only a very small quantity of boron is in the M3(C, B) phase. 相似文献
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《钢铁研究学报(英文版)》2011,(Z1):432-436
To develop the Q960 high-strength quenched and tempered steel plates for construction machinery,the effects of quenching and tempering treating regime on the microstructures and mechanical properties were investigated.The results show that the perfect austenization and fine grain size can be achieved by the optimum quenching process that is quenching temperature 900℃ and holding time 20min.Considering performance and production efficiency,the optimum tempering process parameters are found that tempering temperature 600℃ and holding time 40min.The excellent overall properties of specimens with tempered sorbite microstructure can be ultimately obtained.The yield strength is 1030MPa,tensile strength 1080MPa,percentage elongation 16.8% and the Charpy impact energy 144J at-40℃.All these indexes come up to the National Standard GB/T 16270-2009. 相似文献
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钢框架梁柱节点脆性破坏的分析与改进 总被引:4,自引:0,他引:4
肖利平 《有色冶金设计与研究》2004,25(4):28-31,37
对钢框架焊接节点发生脆性破坏的原因进行了分析,综合国内外研究成果提出了节点构造改进方法,从而有效地增加结构的耗能能力和延性,抗震性能大为改善。 相似文献