隐晶马氏体

表层组织为细小、隐晶马氏体和弥散分布大小不一的合金碳化物，硬度很高；

The surface microstructure is fine cryptocrystalline martensite and alloy carbide which results in high hardness .

结果表明，激光表面淬火时，激光能量密度为40J/mm2时，表面硬度值提高；表层组织为细小、隐晶马氏体和弥散分布大小不一的合金碳化物，硬度很高；

The results show that when surface energy density is about 40J / mm ~ 2 , the highest hardness can be obtained , the surface microstructure is fine cryptocrystalline martensite and alloy carbide which results in high hardness ;

其硬化组织主要为隐晶马氏体，片状石墨基本保持原形貌不变。

The laser hardening microscopic structures are mainly very fine martensite and the original pattern of flake graphite basically remain .

研制的新型高强韧性耐磨钢，铸态空冷及淬火回火处理均可获得细小或隐晶马氏体，少量贝氏体和残留奥氏体以及碳化物。

The microstructures of medium carbon wear resistance steel after quenching and tempering are martensite and small amount of bainite , retained austenite and carbide .

由于钢加热时表面层ε相的分解和氮原子向深层扩散，中炭钢软氮化再加热淬火后可获得含氮的针状隐晶马氏体组织。

Because reheating causes the decomposition of e phase at the surface and the inward diffusion of nitrogen atoms , fine acicular nitrogen ? containing martensitic structure can be obtained after reheating and quenching of the nitrocarburized medium carbon steel .