著者

坂井 一男

出版者

The Iron and Steel Institute of Japan

雑誌

鉄と鋼 (ISSN:00211575)

巻号頁・発行日

vol.60, no.12, pp.1591-1598, 1974-10-01 (Released:2010-10-12)

参考文献数

12

被引用文献数

3 4

---

The paper presented a calculation of thrmal stress in a cylindrical steel induced during cooling by introduction of strain-history into Hara's calculation method.Calculation was based on elastic-plastic theory and total strain was calculated by non-linear integral equation through a successive integration. Plastic strain was calculated by total strain theory and stress-strain diagram.A calculation was made for a cylindrical steel bar with 1500mm in diameter quenched in mist from 850°C, and the results are as follows.(1) Tensile stresses (δt, δz, ) at surface of bar are the largest, when temperature difference between surface and core was the largest.(2) Stresses (δt, δz) at starting point of transformation always show the maximum tensile values.(3) Reverse of stresses (δr, δt, δz) takes place after completion of transformation of core.(4) At final stage of cooling, core has tensile stresses (δr, δt, δz) and surface layer has compressive stresses (δt, δz) of characteristic pattern.