Transactions of Materials and Heat Treatment

Title：Influence of preheating before solution on microstructure uniformity for Ti6Al4V alloy ring forgings with thick cross-section

Authors：

Unit：

KeyWords：

ClassificationCode：T156.1

year,vol(issue):pagenumber：2023,48(9):213-219

Abstract：

For Ti6Al4V alloy ring-rolled forgings with a cross-section thickness of more than 100 mm, the process tests of preheating treatment at 650 ℃ and then rising to 960 ℃ for solution treatment and furnace charging at the set temperature of 960 ℃ for solution treatment were carried out, and equivalent test blocks and load thermocouple were used to monitor the temperature change and holding time during heat treatment of Ti6Al4V alloy ring-rolled forgings with thick cross-section. Then, the macrostructure of cross-section test pieces cut from the typical positions of forgings after different heat treatments were observed, and the specimens were cut from the inner diameter, core and outer diameter areas of forgings to observe microstructure and test tensile properties at room temperature. Furthermore, the influences of the two heat treatment processes on the microstructure uniformity and the tensile strength uniformity at room temperature of ring forgings were compared and analyzed. The research results show that the microstructure uniformity and the tensile strength uniformity at room temperature of the ring forgings preheated at 650 ℃ before solution treatment are better than those of the forgings furnaced at the set temperature of 960 ℃ for solution treatment. However, limited by the hardenability of alloy, the preheating treatment can not completely eliminate the differences in the microstructure and properties of Ti6Al4V alloy ring forgings with thick cross-section at different cross-sectional positions.

Funds：

邹朝江(1984-)，男，学士，工程师 E-mail：zouchaojiang@gzhykj.net

Reference：

[1]钦兰云，李明东，杨光，等.热处理对激光沉积TC4钛合金组织与力学性能的影响[J].稀有金属，2018，42(7)：698-704.

Qin L Y, Li M D, Yang G, et al. Microstructure and mechanical properties of laser deposition manufacturing TC4 titanium alloy with heat treatment [J]. Chinese Journal of Rare Metals, 2018, 42(7): 698-704.

[2]马英杰，刘建荣，雷家峰，等.多重热处理对TC4合金的组织和力学性能的影响[J].材料研究学报，2008，22(5)：555-560.

Ma Y J, Liu J R, Lei J F, et al. The influence of multi heattreatment on microstructure and mechanical properties of TC4 alloy [J]. Chinese Journal of Materials Research, 2008, 22(5):555-560.

[3]顾晓辉，刘君，石继红，等.淬火、时效温度对TC4钛合金组织和力学性能的影响[J].金属热处理，2011，36(2)：29-33.

Gu X H, Liu J, Shi J H, et al. Influence of quenching and aging temperature on microstructure and mechanical properties of TC4 titanium alloy[J]. Heat Treatment of Metals, 2011, 36(2): 29-33.

[4]李冬，曾卫东，李欣，等.Ti60合金保温过程中片状组织的粗化行为[J].稀有金属，2022，46(3)：273-280.

Li D, Zeng W D, Li X, et al. Coarsening behavior of lamellar microstructure of Ti60 alloy during heat treatment[J].Chinese Journal of Rare Metals, 2022, 46(3): 273-280.

[5]Fan X G, Yang H.Internalstatevariable based selconsistent constitutive modeling for hot working of twophase titanium alloys coupling microstructure evolution [J].International Journal of Plasticity，2011，27(11):1833-1852.

[6]帅美荣.钛合金棒材三辊热连轧过程变形机理与技术研究[D].太原：太原科技大学，2012.

Shuai M R. Study on Deformation Mechanism and Technique of Titanium Alloy Rod During Threeroll Hot Continuous Rolling Process [D]. Taiyuan: Taiyuan University of Science & Technology, 2012.

[7]李静，林鑫，钱远宏，等.激光立体成形TC4钛合金组织和力学性能研究[J].中国激光，2014，41（11）：109-113.

Li J, Lin X, Qian Y H, et al. Study on microstructure and property of laser solid forming TC4 titanium alloy [J]. Chinese Laser, 2014, 41(11): 109-113.

[8]党全顺. Ti6Al4V大规格棒材工艺研究[J]. 世界有色金属，2015，(5): 45-47.

Dang Q S. Research on production process of largesized Ti6Al4V rods [J]. World Nonferrous Metals, 2015, (5): 45-47.

[9]Liu W Y, Lin Y H, Chen Y H, et al. Effect of different heat treatments on microstructure and mechanical properties of Ti6Al4V titanium alloy [J]. Rare Metal Materials and Engineering, 2017, 46(3): 634-639.

[10]杜刚，孙小平，高玉社，等. 低温固溶及时效处理对TC4钛合金棒材组织及力学性能的影响[J]. 稀有金属材料与工程，2018,47(6)：1941-1944.

Du G, Sun X P, Gao Y S, et al. Effect of low temperature solution and aging treatment on microstructure and mechanical properties of TC4 alloy bars [J]. Rare Metal Materials and Engineering, 2018, 47(6): 1941-1944.

[11]朱宝辉，曾卫东，陈林，等. 固溶时效工艺对Ti6Al6V2Sn钛合金棒材组织及性能的影响[J]. 中国有色金属学报，2018, 28(4): 677-684.

Zhu B H, Zeng W D, Chen L, et al. Influences of solution and aging treatment process on microstructure and mechanical properties of Ti6AI6V2Sn titanium alloy rods [J]. The Chinese Journal of Nonferrous Metals, 2018, 28(4):677-684.

[12]谭海波，师周龙，张书美，等. β退火参数对Ti6Al4V合金组织和性能的影响[J].金属热处理，2021，46(1)：209-213.

Tan H B, Shi Z L, Zhang S M, et al. Effect of β annealing parameter on microstructure and properties of Ti6Al4V titanium alloy[J]. Heat Treatment of Metals, 2021, 46(1): 209-213.

Service：

【This site has not yet opened Download Service】【Add Favorite】