Transactions of Materials and Heat Treatment

Title：Calculation of large cylindrical ingot heating rate under the third boundary condition

Authors： GAO Xing-yong ZHENG Ji-ming

Unit： Guizhou Normal University

KeyWords： the third boundary condition large cylindrical ingot heating rate maximum temperature difference internal stress

ClassificationCode：TG316

year,vol(issue):pagenumber：2013,38(4):11-13

Abstract：

The large steel ingot heating process under the third boundary condition was analyzed. The transient heating process of steel ingot radial, transverse and tangential stress model was established by the calculation method for the heating temperature distribution changes along the ingot crosssection and ingot transient thermal stress caused by the temperature gradient. Based on the instantaneous stress model, according to the ingot temperature yield strength and heating furnace temperature value, a formula was proposed to control the ingot heating speed. The heating process parameters calculated with this method can effectively control the ingot temperature rising speed to avoid the ingot cracks in the heating process. The method has been applied in some special steel forging factories and the production practice has proved that the method is feasible.

Funds：

贵州省科学技术基金资助项目（黔科合J字[2012]2270号、黔科合J字[2011]2027号）

高兴勇（1963-），男，本科，教授

Reference：

［1］高兴勇.第三类边界条件下大圆柱形钢锭的加热计算[J].热加工工艺，2011,40（5）：99-101. Gao X Y ,Under third boundary condition largescale circular cylinder steel ingot heating calculation[J].Hot Working Technology, 2011,40（5）：99-101.
［2］明赐东.调节阀应用1000问[M].北京：化学工业出版社，2006. Min C D. Regulating Valve Application 1000Q[M]. Beijing:Chemical Industry Press,2006.
［3］高兴勇.大型圆柱体钢锭非稳态导热的集总热容法应用[J].锻压技术，2011，36（2）:116-119. Gao X Y,Application of lumped heatcapacity method to largebscale circular cylindersteel ingot unsteady state heat conduction[J].Forging ＆ Stamping Technology, 2011，36（2）:116-119.
［4］Alam M K , Goetz R L, Semiatin S L. Modeling of thermal stresses and thermal cracking during heating of large ingots[J]. Journal of Manufacturing Science and Engineering. 1996,(1): 118-237.
［5］Incropera F P,DeWitt D P, Bergman T L, 等. 传热和传质基本原理[M].葛新石，叶宏, 译.北京：化学工业出版社，2007.Incropera F P, DeWitt D P,Bergman T L, et al. Fundamentals of Heat and Mass Transfer[M].Translated by Ge X S, Ye H. Beijing:Chemical Industry Press,2007.
［6］Sun R C. Determination of the forging-heating Schedule for a large hastelloy alloy X ingot[J]. Metall. Trans.，1970，(1)：1881-1887.
［7］GB/T12221984.弹簧钢国家标准[S]. GB/T12221984.Spring steel with national standards[S].

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