采用有限元法的平面轴对称分析模型,依据渗硼表面和界面特征,计算45钢在840-1050℃渗硼表面的热应力45钢渗硼试样在外表面区边缘、FeB/Fe2B界面和Fe2B/钢基体界面呈张应力状态,且界面区存在着急剧的张应力和压应力的交替变化.计算与文献报道的实测应力分布规律一致.钢的渗硼表面的高张应力造成渗硼试样的表面开裂;硼化物和钢基体界面产生的微区塑性变形导致硼化物层剥落.
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