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首页> 外文期刊>Journal of Materials Engineering and Performance >Rapid Tempering of Martensitic Stainless Steel AISI420: Microstructure, Mechanical and Corrosion Properties
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Rapid Tempering of Martensitic Stainless Steel AISI420: Microstructure, Mechanical and Corrosion Properties

机译：马氏体不锈钢AISI420的快速回火AISI420：微观结构，机械和腐蚀性能

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摘要

In this research, the effect of rapid tempering on the microstructure, mechanical properties and corrosion resistance of AISI 420 martensitic stainless steel has been investigated. At first, all test specimens were austenitized at 1050 A degrees C for 1 h and tempered at 200 A degrees C for 1 h. Then, the samples were rapidly reheated by a salt bath furnace in a temperature range from 300 to 1050 A degrees C for 2 min and cooled in air. The tensile tests, impact, hardness and electrochemical corrosion were carried out on the reheated samples. Scanning electron microscopy was used to study the microstructure and fracture surface. To investigate carbides, transmission electron microscopy and also scanning electron microscopy were used. X-ray diffraction was used for determination of the retained austenite. The results showed that the minimum properties such as the tensile strength, impact energy, hardness and corrosion resistance were obtained at reheating temperature of 700 A degrees C. Semi-continuous carbides in the grain boundaries were seen in this temperature. Secondary hardening phenomenon was occurred at reheating temperature of 500 A degrees C.
机译：在本研究中，研究了迅速回火对AISI 420马氏体不锈钢的微观结构，机械性能和耐腐蚀性的影响。首先，所有测试样品在1050℃下奥氏体化1小时，并在200℃下回火1小时。然后，将样品通过盐浴炉在300至1050℃的温度范围内快速重新加热2分钟并在空气中冷却。在再加热样品上进行拉伸试验，冲击，硬度和电化学腐蚀。扫描电子显微镜用于研究微观结构和裂缝表面。为了研究碳化物，使用透射电子显微镜以及扫描电子显微镜检查。 X射线衍射用于测定保留的奥氏体。结果表明，在重新加热温度下，在700℃的再加热温度下获得诸如拉伸强度，冲击能量，硬度和耐腐蚀性的最小性质。在该温度下，可以在晶粒边界中进行半连续碳化物。在再加热温度为500℃下进行二次硬化现象。

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