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研究了高碳珠光体T8钢在ECAP处理后的显微组织和力学性能。结果表明,利用多道次ECAP温变形能够使高碳珠光体钢组织呈现超微细化效果。复相组织中亚纳米级铁素体相纳米压痕杨氏模量和硬度分别为203 GPa和4.4 GPa。当纳米压痕深度超过100 nm后,杨氏模量对基底效应敏感度较低,而纳米压痕硬度出现较为明显的基底效应。
The microstructure and mechanical properties of high carbon pearlite T8 steel after ECAP treatment were studied. The results show that the use of multi-pass ECAP temperature deformation of high carbon pearlite steel microstructure can show the effect of ultrafine. The nano-scale ferrite phase nanoindentation Young’s modulus and hardness in complex phase are 203 GPa and 4.4 GPa, respectively. When the nano-indentation depth exceeds 100 nm, the Young’s modulus is less sensitive to the substrate effect, while the nano-indentation hardness has a more obvious substrate effect.