THE POSSIBILITIES OF THE RETAINED AUSTENITE REDUCTION ON TOOL STEELS
THE POSSIBILITIES OF THE RETAINED AUSTENITE REDUCTION ON TOOL STEELS
复制标题
工具钢残余奥氏体减少的可能性
DOI：
10.36868/ejmse.2021.06.02.099
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发表时间：
2021
影响因子：
--
通讯作者：
L. Tóth
中科院分区：
文献类型：
--
作者：
L. Tóth
残余奥氏体在钢中引起大量内应力，通常表现为裂纹。残余奥氏体还对钢部件的尺寸稳定性具有负面影响。在工具钢中，残余奥氏体被认为是非常有害的，并且是许多应用失败的原因。工具钢必须能够达到高硬度、高抗压强度、良好的韧性，以适合先进高强度钢的成形。高合金元素含量的工具钢导致低的马氏体开始温度和马氏体结束温度。结果，当淬火至室温时，奥氏体向马氏体的转变不完全。在这项工作中，回火和深冷处理的效果进行了研究，以减少残余奥氏体量的情况下，冷作工具钢和热作工具钢。结果表明，对于工具钢，在高淬和三次高温回火过程中，残余奥氏体量显著减少，深冷处理使残余奥氏体完全消失。
The retained austenite induces a great deal of internal stress in the steel, often manifesting itself as cracks. Retained austenite also have a negative effect on dimensional stability of the steel components. In tool steels retained austenite is considered to be highly detrimental and is the cause of many application failures. Tool steels must be able to attain high hardness, high compressive strength, good toughness to be suitable for forming of advanced high-strength steels. The high alloying elements content tool steels result is low martensite start and martensite finish temperatures. As a result, the transformation of austenite to martensite does not go to completion when quenching to room temperature. In this work the effects of tempering and cryogenic treatment were investigated for reducing the amount of residual austenite in case of a cold work tool steel and a hot work tool steel. The results showed that in the case of tool steels, during high hardening and three times tempering at high temperatures, the amount of residual austenite was significantly reduced and as a result of cryogenic treatment completely disappeared.