Series impact tests were carried out to measure the series impact work done to a 400?MPaclass supersteel which was supplied through controlled rolling and cooling rate accelerated with trace element Nb contained, thus giving a brittle transition temperature curve.
以微Nb处理控轧控冷工艺生产的400MPa级超级钢为研究对象,采用"系列冲击实验法"测定系列冲击功,绘制出脆性转变温度曲线·按综合能量法及断口形貌,确定出脆性转变温度为-80℃,并与相同化学成分、普通方法生产的钢板的脆性转变温度加以比较,对这一温度降低的原因进行了分析·分析结果认为,脆性转变温度降低、低温韧性的改善是化学成分、微观组织、轧制工艺综合作用的结果·钢中S、P、Si含量低有利于脆性转变温度的降低、微量Nb的存在有利于脆性转变温度的降低;晶粒细化,亚晶强化是试验钢脆性转变温度降低的组织原因;控轧控冷工艺的采用是降低脆性转变温度的工艺因素
Based on the character of ductile-brittle transition temperature curve, Boltzmann function was proposed to depict the relationship of impact absorbing energy with temperature deterministically and quantitatively.
试验数据的回归分析表明 ,该方法获取的回归曲线具有较高相关系数 ,并能较准确地求取材料脆性转变温度vTr5 4 。
Charpy brittle transition temperature was studied and the mechanical properties and fracture toughness were tested at room temperature and working iemperaiure for 11/4Cr-1/2Mo steel, which has been used in hydrogen with partial pressure 4.
55MPa氢分压下使用12万小时的1 1/4Cr-1/2Mo钢进行了室温及使用温度的力学性能,断裂韧性和夏比冲击功的脆性转变温度的试验研究。
The paper studies the facture appearance transition temperature(FATT)of SA335P91/12CrMoV dissimilar steel welding metal.
本课题对异种钢焊接SA335P91/12Cr1MoV的焊缝金属脆性转变温度进行了研究,通过高、中、低3种不同匹配的焊缝金属夏比缺口冲击试验数据的计算及分析,得出SA335P91/12Cr1MoV异种钢3种匹配的焊接接头焊缝金属的脆性转变温度分别为低匹配78℃、中匹配79℃、高匹配91℃。