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首页> 外文期刊>Materials Science and Engineering. A, Structural Materials: Properties, Microstructure and Processing >Effect of austempering on microstructure and mechanical properties of a GCr18Mo steel
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Effect of austempering on microstructure and mechanical properties of a GCr18Mo steel

机译:奥氏体回火对GCr18Mo钢组织和力学性能的影响

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摘要

The microstructure and mechanical properties of a GCr18Mo steel were investigated. The martensite/lower bainite (B_L/M) duplex structure with various B_L volume fractions (f_(B_L)) or that full of B_L were produced by austenitizing at 870℃, quenching in nitrates at 230℃ and holding for different times. The steels with such structures exhibit higher strength-toughness than that of full martensite. When f_(B_L) is approximately 37.5% obtained by holding for about 60 min, the duplex-structured steel gives rise to the best combination of mechanical properties.
机译:研究了GCr18Mo钢的组织和力学性能。马氏体/下贝氏体(B_L / M)双相结构具有各种B_L体积分数(f_(B_L))或充满了B_L,是通过在870℃下奥氏体化,在230℃下在硝酸盐中淬火并保持不同的时间而产生的。具有这种结构的钢具有比全马氏体更高的强度-韧性。当通过保持约60分钟而获得的f_(B_L)为约37.5%时,双相结构钢产生了机械性能的最佳组合。

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