金属学报  1983, Vol. 19 Issue (6): 5-114

论文 本期目录 | 过刊浏览 |

硼钢淬透性与硼向奥氏体晶界的偏聚

贺信莱;褚幼义;柯俊

北京钢铁学院;北京钢铁学院;北京钢铁学院

THE HARDENABILITY OF BORON STEEL AND THE SEGREGATION OF BORON

HE Xinlai; CHU Youyi; KE Jun (T. Ko) (Beijing University of Iron and Steel Technology)

贺信莱;褚幼义;柯俊. 硼钢淬透性与硼向奥氏体晶界的偏聚[J]. 金属学报, 1983, 19(6): 5-114.
, , . THE HARDENABILITY OF BORON STEEL AND THE SEGREGATION OF BORON[J]. Acta Metall Sin, 1983, 19(6): 5-114.

摘要 参考文献 相关文章 Metrics 全文: PDF(5111 KB)   摘要: 用改进的径迹显微照相技术研究了50B钢800—1150℃顶端淬火试样中硼分布状态的变化规律及其与硼钢淬透性的关系。试验表明,硼钢淬透性的变化与冷却时硼向奥氏体晶界偏聚的发展速度密切相关。由硼的成分剖面图可定量测定出这种偏聚的发展速度。 晶界硼偏聚发展过快或过慢均不利于硼提高淬透性的效应。只有当晶界硼偏聚的发展速度与基体成分相变孕育期相配合时,硼才能发挥最大效应。利用这种观点可以说明硼钢淬透性的变化特征,分析影响硼钢淬透性的各种因素。 Abstract：The process of boron segregation to austenite grain boundary has been investigated by particle-tracking autoradiography of Jominy bar of a medium carbon boron steel (0.54%C, 0.75%Mn and 0.0027% acid soluble boron) quenched from different temperatures (800—1150℃) after heating to a same high austenitizing temperature (1150℃). It has been shown that the boron segregation to austenite grain boundary in quenched specimens increases with increasing quenching temperature and is related to and dominated by a process other than equilibrium adsorption. In the present work, it has been found that at any position of the Jominy bar, the grain boundary segregation develops continuously during cooling and the final extent of segregation varies with Jominy distance. The grain boundary segregation intensifies as the cooling rate decreases and changes from continuous boronenriched networks to discontinuous aggregation and even to discrete precipitation of boron constitutents. The developing rate of grain boundary segregation increases with increase of the quenching temperature. The boron concentration profiles and the widths of boron-depleted zone have been experimentally measured, and the developing rate of grain boundary segregation estimated and related to the hardenability of boron steel.Under a given quenching temperature, the width of the boron depleted zone x_i is inversely proportional to A~(1/2), where A is the cooling rate or x=H(T_i)/A~(1/2). H(T_i) increase with increasing quenching temperature and is a reflection of the rate of grain boundary segregation and effects of composition and other structural factors. It is suggested that the effect of boron on the hardenability depends on the relative rate of segregation to austenite grain boundary and the incubation of the austenite decomposition, and is at its best when the correlation of both rates is optimum. 收稿日期: 1983-06-18      服务 把本文推荐给朋友 加入引用管理器 E-mail Alert RSS 作者相关文章 贺信莱 褚幼义 柯俊 44.8K 链接本文: https://www.ams.org.cn/CN/      或      https://www.ams.org.cn/CN/Y1983/V19/I6/5 1 Grange, R.A.; Shortsleeve, F.J.; Hilty, D.C.; Binder, W.O.; Motock, G. T.; Offenhauer, C.M., Boron, Calcium, Calumbium and Zirconium in Iron and Steel, Wiley, New York, 1957, p. 1-57． 2 Brownrigy, A., J. Aust. Inst. Met., 18 (1973) , 124． 3 Kapadia, B.N., Hardenablity Concepts with Application to Steer, Proc. of a Symp. Held at the Sheraton-Chicago Hotel, Oct. 1977, Eds. Dovne, D. V.; Kirkaldy, J.S., Metall. Soc. AIME, 1978, p.448． 4 Morral, J.E.; Cameron, T.B., Boron in Steel, Proc. of the Int. Symp. on Boron Steel, Milwaukee, Wisconsin, Sept. 1979, Eds. Banerji, S.K.; Morral, J.E., Metall. Soc. AIME, 1980, p.19． 5 Simcoe, C.R.; Elsea, A.R.; Manning, G.K., Trans. AIME, 203 (1955) , 193． 6 Melloy, G.F.; Slimmon, P.R.; Podyursky, P.P., Metall. Trans., 4 (1973) , 2279． 7 土生隆一;宫田政祐;関野昌藏;合田进,铁鋼,60(1974) ,1470． 8 Williams, T.M.; Stoneham. A.M.; Harries, D.R., Met Sci., 10 (1976) , 14． 9 贺信莱;褚幼义;张秀林;余宗森;李秋萍;尹熙光,金属学报,13 (1977) ,2． 10 Keown, S.K.; Pickering, F.B., Met. Sci., 11 (1977) , 225． 11 Ueno, M.; Lnonc, T., Trans. Iron Steel Inst. Jpn., 13 (1973) , 210． 12 #12 13 贺信莱;褚幼义;柯俊,金属学报,18 (1982) ,1． 14 贺信莱;褚幼义;柯俊,ibid.,18 (1982) ,11． 15 贺信莱;褚幼义;柯俊,中美双边冶金学术会议论文集,1981,p.532． (英文版). 16 褚幼义;贺信莱;余宗森;欧宇光,金属学报,16 (1980) ,386． 17 Maitrepierre, Ph.; Thivellier, D.; Rofesvernis, J.; Rousseau, D.; Tricot, R., Hardenability Concepts with Application to Steel, Proc. of a Symp. held at the Sheraton-Chicago Hotel, Oct. 1977, Eds. Dovne, D.V.; Kirkaldy, J.S., Metall. Soc. AIME, 1978, p.421． 18 贺信莱;褚幼义,理化检验(物理分册),(1975) ,№5,29;№6,25． 19 He, X.L. (贺信莱); Chu, Y.Y. (褚幼义), J. Phys. D: Appl. Phys., 16 (1983) , 1145-1158． 20 沈鹏,金属学报,11(1975) ,33． 21 Maittrepierre, Ph.; Thivellier, D.; Tricot, R., Mem. Sci. Rev. Metall., 70 (1973) , 893． 22 Mclean, D., Grain Boundaries in Metals, Oxford, 1957, p.116 No related articles found! Viewed Full text Abstract Cited   Shared      Discussed