Effect of Manganese on Microstructure and Mechanical Properties of Cast High Alloyed CrMnNi‐N Steels

Effect of Manganese on Microstructure and Mechanical Properties of Cast High Alloyed CrMnNi‐N Steels
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锰对铸造高合金 CrMnNiâN 钢显微组织和力学性能的影响

DOI:
10.1002/adem.201200318
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发表时间:
2013
影响因子:
3.6
通讯作者:
Kovalev
Kovalev
中科院分区:
材料科学3区
文献类型:
--
作者:
Wendler;Krüger;Franke;Kovalev

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研究了锰含量 (0–11%) 对含 0.1% 氮的五种高合金 14Cr-XMn-6Ni 铸造不锈钢的转变温度、力学性能和显微组织发展的影响。测试表明Ms、As和Af温度随着锰含量的增加而降低。由于奥氏体稳定性较低,当锰含量在 0% 至 3% 之间时,会形成室温奥氏体-马氏体铸态显微组织。当锰含量为 6% 或更高时,观察到完全奥氏体铸态微观结构。合金拉伸性能的温度依赖性是根据变形诱导马氏体的强度和延展性的不同贡献以及孪晶形成机制来解释的。所有研究的铸钢合金在室温下的屈服强度均超过 200MPa。屈服强度的增加是由于添加氮和锰导致的固溶强化以及淬火马氏体的相硬化引起的。
The effect of the manganese content (0–11%) on the transformation temperatures, the mechanical properties and microstructure development of five highly alloyed 14Cr–XMn–6Ni cast stainless steels with 0.1% nitrogen was studied. The examinations reveal that theMs,As, andAftemperatures decrease with increasing manganese contents. As a result of low austenite stability, room temperature austenitic‐martensitic as‐cast microstructure was formed at manganese contents between 0 and 3%. At manganese levels of 6% and higher a fully austenitic as‐cast microstructure was observed. The temperature dependence of tensile properties in alloys was explained on the basis of varying contributions to the strength and ductility of deformation‐induced martensite and twin formation mechanisms. All investigated cast steel alloys achieved yield strengths above 200 MPa at room temperature. The increased proof stress is caused by solid solution strengthening due to the addition of nitrogen and manganese as well as phase hardening by as‐quenched martensite.
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