In this study, tempering effect on the residual stress is studied after uniform heating–quenching and nonuniform heating–quenching for bimetallic work roll. Results for uniform heating treatment showed that the maximum stress at the center decreases by 68% from 396 MPa to 126 MPa after the first and second tempering. Results for nonuniform heating treatment showed that the maximum stress at the center decreases by 47% from 309 MPa to 165 MPa after the first and second tempering. It may be concluded that nonuniform heating–quenching and tempering are useful for reducing the central tensile stress preventing cracks at the roll surface.

中文翻译：

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回火对双金属轧辊残余应力的影响

本研究研究了双金属工作辊均匀加热淬火和非均匀加热淬火后回火对残余应力的影响。均匀热处理结果表明，在第一次和第二次回火后，中心处的最大应力从 396 MPa 降低到 126 MPa，降低了 68%。非均匀热处理结果表明，在第一次和第二次回火后，中心处的最大应力从 309 MPa 降低到 165 MPa，降低了 47%。可以得出结论，不均匀的加热淬火和回火有助于降低中心拉伸应力，防止轧辊表面出现裂纹。