Wiengmoon Amporn, Pearce John T H, Nusen Sankum, Chairuangsri Torranin
Department of Physics, Faculty of Science, Naresuan University, Phitsanulok, 65000, Thailand.
Panyapiwat Institute of Management, Nonthaburi, 11120, Thailand.
Micron. 2021 Apr;143:103025. doi: 10.1016/j.micron.2021.103025. Epub 2021 Jan 27.
The effect of a 0.7 wt.%Mo addition on the microstructure and hardness of a heat treated 25 wt.%Cr-2.4 wt.%C cast iron has been studied via comparison with a Mo free reference 25 wt.%Cr-2.4 wt.%C iron. Destabilization led to precipitation of MC and MC secondary carbides in the reference iron, whereas MC secondary carbide was found in the iron with 0.7 wt.%Mo. Tempering resulted in additional secondary carbide precipitation and formation of ferrite. Secondary hardening was found in the iron with 0.7 wt.%Mo. For the destabilized + tempered condition the macro-hardness of the iron with 0.7 wt.%Mo addition was higher than the reference iron due to a finer and denser distribution of secondary-carbides.
通过与不含钼的25 wt.%Cr-2.4 wt.%C铸铁参考样品进行对比，研究了添加0.7 wt.%钼对热处理后的25 wt.%Cr-2.4 wt.%C铸铁微观结构和硬度的影响。失稳导致参考铸铁中析出MC和MC型二次碳化物，而在含0.7 wt.%钼的铸铁中发现了MC型二次碳化物。回火导致额外的二次碳化物析出和铁素体形成。在含0.7 wt.%钼的铸铁中发现了二次硬化现象。对于失稳+回火状态，由于二次碳化物分布更细且更密集，添加0.7 wt.%钼的铸铁的宏观硬度高于参考铸铁。
