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首页> 外文会议>Association for Iron Steel Technology Process Metallurgy, Product Quality and Applications Proceedings >MICROSTRUCTURE AND HARDNESS OF STEEL GRADE 9260 HEAT-TREATED BY THE QUENCHING AND PARTITIONING (QP) PROCESS
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MICROSTRUCTURE AND HARDNESS OF STEEL GRADE 9260 HEAT-TREATED BY THE QUENCHING AND PARTITIONING (QP) PROCESS

机译：钢级9260的微观结构和硬度通过淬火和分配热处理（Q＆P）工艺

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摘要

This paper summarizes the results of a research project on the response of a grade 9260 bar steel to a new quenching and partitioning (Q&P) heat-treatment process. The Q&P process is intended to produce microstructures consisting of carbon depleted martensite, carbon enriched retained austenite and supersaturated martensite. Austenite fractions and carbon enrichment were calculated for the Q&P process, and compared with experimental data. Mechanical properties were assessed via hardness measurement. The results were compared with microstructures produced by conventional austempering (bainite) or quenching and tempering (martensite). The microstructure obtained through the Q&P process had higher hardness in comparison to bainite and much greater retained austenite fractions than achieved by conventional quenching and tempering. The Q&P austenite fractions generally followed predicted trends, although the amounts and levels of carbon enrichment were less than the predicted maximum values, indicating the occurrence of carbide precipitation during partitioning. Potentially attractive combinations of hardness and retained austenite were achieved without the need for a carburizing heat treatment to stabilize retained austenite.
机译：本文总结了研究项目的结果，对9260级条钢响应到新的淬火和分配（Q＆P）热处理过程。 Q＆P工艺旨在产生由碳耗尽马氏体组成的微结构，富含碳含量的奥氏体和超饱和马氏体。 Q＆P过程计算奥氏体分数和碳富集，并与实验数据进行比较。通过硬度测量评估机械性能。将结果与通过常规常规型（贝氏体）或淬火和回火（马氏体）产生的微观结构进行比较。通过Q＆P工艺获得的微观结构与贝氏体相比具有更高的硬度，并且更大的保留奥氏体级分比通过常规淬火和回火实现而实现。 Q＆P奥氏体馏分通常遵循预测趋势，尽管碳富集的量和水平小于预测的最大值，表明在分区期间发生碳化物沉淀。实现了硬度和保留奥氏体的潜在有吸引力的组合，而无需渗碳热处理以稳定保留的奥氏体。

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