Solution and precipitating behaviors of TiC particles in high Ti low alloy steel

doi:10.13251/j.issn.0254-6051.2020.04.022

Abstract

Abstract: Evolution of TiC particles during heating and cooling of high Ti (0.6wt% Ti) low alloy steel was observed by means of high temperature laser scanning confocal microscopy (LSCM). The morphology and distribution of TiC particles in the steel were analyzed by means of OM, SEM, EDS, etc and combined with Thermo-Calc software calculation. The precipitating behaviors of TiC particles were studied. The test results show that the TiC particles formed in different temperature stages have different shapes, and gradually precipitate from the matrix according to the particle diameter order from large to small. The inhibition of precipitation of small-sized TiC particles by high temperature is more remarkable. At high temperature, a plurality of adjacent large-sized TiC particles aggregate on the surface to form a flocculent morphology. And TiC particles precipitated at high temperature solid phase change from a spherical unstable state to a cubic stable morphology, but the degree of coarsening is negligible.

Key words: high Ti low alloy steel, TiC particle morphology, precipitation behavior

CLC Number:

TG142.33

Liu Luojin, Liang Xiaokai, Sun Xinjun. Solution and precipitating behaviors of TiC particles in high Ti low alloy steel[J]. Heat Treatment of Metals, 2020, 45(4): 110-114.

References

[1]吕唯洁, 张荻. 原位合成钛基复合材料的制备、微结构及力学性能[M]. 北京: 高等教育出版社, 2005.
[2]梁小凯, 孙新军, 雍岐龙, 等. TiC颗粒强化型马氏体耐磨钢的性能研究[J]. 钢铁钒钛, 2017, 38(1): 48-53.
Liang Xiaokai, Sun Xinjun, Yong Qilong, et al. Study on performance of TiC particle reinforced martensite wear-resistant steel[J]. Iron Steel Vanadium Titandium, 2017, 38(1): 48-53.
[3]Dogan Ö N, Hawk J A, Schrems K K. TiC-reinforced cast Cr steels[J]. Journal of Materials Engineering and Performance, 2006, 15(3): 320-327.
[4]梁小凯, 孙新军, 雍岐龙, 等. 高钛钢中TiC析出机制[J]. 钢铁研究学报, 2016, 28(9): 71-75.
Liang Xiaokai, Sun Xinjun, Yong Qilong, et al. Precipitation of TiC in high Ti steel[J]. Journal of Iron and Steel Research, 2016, 28(9): 71-75.
[5]Koseki T, Thewlis G. Overview Inclusion assisted microstructure control in C-Mn and low alloy steel welds[J]. Materials Science and Technology, 2005, 21(8): 867-879.
[6]Hong S C, Lim S H, Hong H S, et al. Effects of Nb on strain induced ferrite transformation in C-Mn steel[J]. Materials Science and Engineering A, 2003, 355(1/2): 241-248.
[7]胡汉起. 金属凝固原理[M]. 北京: 机械工业出版社, 2007: 24-37.
[8]马晓光. 铝熔体反应合成TiC的微观形貌与生长机制研究[D]. 济南: 山东大学, 2010: 44-45.
[9]Chalmers B. Principles of Solidification[M]. New York: John Wiley. 1964: 77-83.
[10]张克从, 张乐潓. 晶体生长科学与技术[M]. 北京: 科学出版社, 1997: 78-79.
[11]Bravais A. Mémoire sur les systèmes formés par des points régulièrement distribués sur un plan ou dans l'espace[J]. J Ecole Polytech, 1850, 19: 1-128.
[12]Enomoto M, Yang Z G. Equilibrium shape of TiN in iron[J]. ISIJ International, 2004, 44: 1454-1456.
[13]Yang Z G, Enomoto M. Calculation of the interfacial energy of B1-type carbides and nitrides with austenite[J]. Metallurgical and Materials Transactions A, 2001, 32(2): 267-274.
[14]Terentiev S. Molecular-dynamics simulation of the effect of temperature of the growth environment on diamond habit[J]. Diamond and Related Materials, 1999, 8(8/9): 1444-1450.
[15]雍岐龙. 钢铁材料中的第二相[M]. 北京: 冶金工业出版社, 2006: 116-118.
[16]雍岐龙. 稀溶体中第二相质点的Ostwald熟化(I. 普适方程)[J]. 钢铁研究学报, 1991, 3(4): 51-60.
Yong Qilong. Ostwald ripening of second-phase particles in dilute solution I. universal differential equation[J]. Journal of Iron and Steel Research, 1991, 3(4): 51-60.
[17]Kreye H. The influence of dislocations on the coarsening of particles[J]. Zeitschriftfur Me Tallkunde, 1970, 61(2): 108-112.