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首页> 外文会议>Materials structure amp; micromechanics of fracture VIII >Microstructure Analysis and Mechanical Properties of Low Alloy High Strength Quenched and Partitioned Steel
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Microstructure Analysis and Mechanical Properties of Low Alloy High Strength Quenched and Partitioned Steel

机译：低合金高强度分区钢的组织分析和力学性能

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摘要

Gleeble study of the quenching and partitioning (Q&P) process has been performed on Domex 960 steel (Fe, 0.08 %C, 1.79 %Mn, 0.23 %Si, 0.184 %Ti, and 0.038 %A1). The effect of different Q&P conditions on microstructure and mechanical properties were investigated. The aim of the process is to produce a fine grained microstructure for better ductility and controlled amounts of different micro-constituents to increase the strength and toughness simultaneously. Three different quenching temperatures, three partitioning temperatures and three partitioning times have been selected to process the 27 specimens by Gleeble® 1500. The specimens were characterized by means of OM, SEM, XRD, hardness and impact tests. It was found that, fine lath martensite with retained austenite is achievable without high amount of Si or Al in the composition although lack of these elements may cause the formation of carbides and decrease the available amount of carbon for partitioning into the austenite. The hardness increases as the quenching temperature is decreased, however, at highest partitioning temperature (640℃) the hardness increases sharply due to extensive precipitate formatioa.
机译：已经对Domex 960钢（Fe，0.08％C，1.79％Mn，0.23％Si，0.184％Ti和0.038％A1）进行了淬火和分配（Q＆P）过程的敏捷研究。研究了不同Q＆P条件对组织和力学性能的影响。该方法的目的是产生细晶粒的微观结构，以获得更好的延展性，并控制不同数量的微成分的含量，以同时提高强度和韧性。选择了三种不同的淬火温度，三种分配温度和三种分配时间来通过1500处理27个样品。通过OM，SEM，XRD，硬度和冲击试验对样品进行了表征。已经发现，在成分中不含有大量的Si或Al的情况下，可以得到具有残留奥氏体的细板条马氏体，尽管缺乏这些元素会导致碳化物的形成并减少可分配给奥氏体的碳的量。硬度随着淬火温度的降低而增加，但是，在最高分配温度（640℃）下，由于大量的析出物形成，硬度急剧增加。

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