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首页> 外文会议>Annual Meeting Exhibition of The Minerals, Metals Materials Society >Effect of Intercritical Heat Treatment on Microstructure and Mechanical Properties of Sn Bearing 33MnCrB5 Steel
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Effect of Intercritical Heat Treatment on Microstructure and Mechanical Properties of Sn Bearing 33MnCrB5 Steel

机译：跨临界热处理对33mncRB5钢组织和力学性能的影响

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With the recycling of scrap steel, the accumulation of Sn deteriorates the properties of high-strength low-alloy structural steel. The effect of intercritical heat treatment (IHT) on microstructure and the mechanical properties of Sn bearing 33MnCrB5 steel has been studied. Results indicated that a composite microstructure of ferrite and martensite was obtained by adding the intercritical quenching to the conventional quenching and tempering. Compared with the conventional heat-treated samples, the impact energy increased evidently from 30 J to 77 J and the strength decreased slightly. The loss of strength resulting from the IHT is reduced by the modification of tempering conditions. Furthermore, AES showed that the grain boundary segregation of Sn can be alleviated via the IHT Based on different heat treatment results, the optimum heat treatment technology, that is, 910 °C normalizing, 860 °C pre-quenching, 770 °C intercritical quenching, 450 °C tempering, was obtained to balance the strength and toughness.
机译：随着废钢的再循环，Sn的积累会降低高强度低合金结构钢的性能。研究了跨临界热处理（IHT）对微观结构的影响及SN轴承33mnCLB5钢的机械性能。结果表明，通过将跨临界猝灭和回火添加互临临时淬火而获得铁素体和马氏体的复合微观结构。与传统的热处理样品相比，碰撞能量显然从30 j到77 j增加，强度略有下降。通过改变回火条件，由IHT产生的强度损失。此外，AES显示SN的晶界分离可以通过IHT基于不同的热处理结果来缓解，最佳热处理技术，即910°C标准化，860°C预淬火，770℃跨临界淬火，获得450°C的回火，以平衡强度和韧性。

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