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采用有限元法计算了两种工艺淬火的9CrSi双曲线管材矫直辊残余应力分布。结果表明,与常规淬火相比,差温加热淬火能降低残余应力峰值,并使内孔表面呈压应力状态,有助于减小淬火开裂倾向.计算所得的常规淬火工件残余应力峰值位置,与实际生产中工件开裂部位相同,表明本文所用计算方法可行。 相似文献
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研究了加工过程中的表面污染、原材料的化学成分以及热处理工艺对304不锈钢焊管酸洗后表面外观质量的影响。结果表明:粉笔污染、原材料中铬含量的不足以及固溶处理中冷速较慢均会导致不锈钢焊管经酸洗后表面出现暗黄色花斑。 相似文献
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石巨岩 《武汉理工大学学报(材料科学英文版)》2012,27(1):9-17
For austenitic octahedral segregation structure units, their pure mathematics statistic distributive probability is calculated by the empirical electron theory (EET) of solids and molecules and K-B formula. The practical distributive probability can be obtained only if the statistic distribution of austenitic octahedral segregation structure units and the interaction of the alloying elements in steel are considered. Based on 8 groups of experimental data of original steels, three empirical formulas revealing relationships between material macromechanics factor (Sm) and tensile strength (σb), or impact energy (AK), or hardness (HRC) of multi-component medium-low-alloy steels were established, respectively. Through the three empirical formulas, new supersaturated carburizing steel has been successfully designed and developed. The other 2 groups of the original experimental steels are used as the standard steel for testing the percentage error of the new steel. The results show that the calculated values are well consistent with those of measured ones and the new supersaturated carburized steel can meet the requirements of the die assembly of cold-drawn seamless stainless steel tube of Taiyuan Iron & Steel (Group) Company LTD. 相似文献
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焊接工艺对2205双相不锈钢焊接接头组织与性能的影响 总被引:1,自引:1,他引:0
采用等离子弧焊打底,分别用钨极氩弧焊盖面和熔化极氩弧焊盖面两种焊接工艺对2205双相不锈钢进行焊接,并对焊接接头进行了固溶处理。对采用两种焊接工艺的焊件的铁素体-奥氏体两相比例以及抗点腐蚀性能进行了分析和检测。结果表明,两种焊接工艺都可以满足焊接接头的各项性能技术要求,钨极氩弧焊焊盖面的焊接接头铁素体含量低于熔化极氩弧焊焊盖面,且冲击韧性也优于熔化极氩弧焊焊盖面,而熔化极氩弧焊焊盖面的焊接接头的抗点腐蚀性能优于钨极氩弧焊焊盖面。 相似文献
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高锰钢冲击磨料磨损特性的研究 总被引:2,自引:0,他引:2
本文对高锰钢在不同冲击载荷下的加工硬化规律和其磨料磨损特性作了系统的试验研究,并指出了加工硬化值与耐磨性间的对应关系,指出高锰钢以某加工硬化值大于HRC54的工况为其适宜工况。 相似文献