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首页> 外文会议>International conference on advanced materials and engineering materials >Tensile Strength Properties of Niobium Alloyed Austempered Ductile Iron on different austempering time
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Tensile Strength Properties of Niobium Alloyed Austempered Ductile Iron on different austempering time

机译：铌合金奥氏体球墨铸铁在不同温度下的拉伸强度性能

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摘要

This study focused on tensile strength properties inclusive of ultimate tensile strength and elongation values of niobium alloyed ductile iron in as cast and austempered conditions. The tensile specimens were machined according to TS 138 EN 10002-1 standard. Austempering heat treatment was conducted by first undergoing austenitizing process at 900ⅹC before rapidly quenched in salt bath furnace and held at 350ⅹC for 1 hour, 2 hours and 3 hours subsequently. The findings indicated that austempering the samples for 1 hour had resulted in improvement of almost twice of the tensile strength in niobium alloyed ductile iron. Improvement of elongations values were also noted after 1 hour austempering times. Increasing the austempering holding times to 2 hour and 3 hours had resulted in decrement in both tensile strength and elongations values.
机译：这项研究的重点是在铸造和奥氏体化条件下，铌合金球墨铸铁的极限拉伸强度特性，包括极限拉伸强度和伸长率值。拉伸样品根据TS 138 EN 10002-1标准进行机加工。首先在900°C下进行奥氏体化处理，然后在盐浴炉中快速淬火，然后在350°C下分别保持1小时，2小时和3小时，然后进行奥氏体热处理。结果表明，对样品进行奥氏体化1小时可以使铌合金球墨铸铁的抗张强度提高近两倍。在等待1小时的回火时间后，还观察到了伸长率值的改善。将奥氏体保持时间增加至2小时和3小时导致抗拉强度和伸长率值均降低。

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