文章信息/Info

Title:

Effect of Hot Rolling Temperature on Cold Roll Formability of TC20 Alloy

作者:

羅錦華1; 朱燕麗1; 2; 侯峰起1; 張鐵邦2; 田成1; 李英浩1

（1.西部超導(dǎo)材料科技股份有限公司，陜西 西安 710018）（2.西北工業(yè)大學(xué)材料學(xué)院，陜西 西安 710072）

Author(s):

LUO Jinhua1;  ZHU Yanli1; 2;  HOU Fengqi1;  ZHANG Tiebang2;  TIAN Cheng1;  LI Yinghao1

(1. Western Superconducting Technologies Co��, Ltd��, Xi�餫n 710018, China)(2. School of Materials Science and Engineering, Northwestern Polytechnical University, Xi�餫n 710072, China)

關(guān)鍵詞:

TC20鈦合金; 熱軋溫度; 冷軋成形性; 顯微組織; 室溫壓縮

Keywords:

TC20 titanium alloy;  hot rolling temperature;  cold roll formability;  microstructure;  room temperature compression

DOI:

10.7502/j.issn.1674-3962.2018.07.06

文獻(xiàn)標(biāo)志碼:

A

摘要:

研究了在1000，940，850 ℃不同溫度熱軋的TC20合金坯料在冷連軋過程中的變形與失穩(wěn)情況，結(jié)合熱軋棒材組織和室溫壓縮的實(shí)驗(yàn)結(jié)果，表明：熱軋溫度越低，冷軋成形性越差。850 ℃熱軋的TC20合金棒坯縱向組織中α相呈連續(xù)纖維狀，冷連軋成形性比較差，極限變形量?jī)H40%左右；1000 ℃的熱軋坯料組織中β相占比增加，冷連軋變形量可以達(dá)到60%，同時(shí)，其室溫壓縮實(shí)驗(yàn)過程中斷裂壓縮率高，塑性變形階段加工硬化速率較小。通過室溫壓縮實(shí)驗(yàn)可直觀評(píng)價(jià)TC20合金絲材的冷軋成形性能。

Abstract:

In this paper, the deformation and destabilization of cold rolling TC20 alloy bars which were hot�瞨olled at 1000, 940 and 850 ℃, were analyzed and compared. Combined with the microstructure of hot�瞨olled bars and room temperature compression experiments, the result showed that the lower hot�瞨olling temperature, the poorer the cold�瞨olling formability. The bar hot�瞨olled at 850 ℃ possessed the longitudinal microstructure of continuous fibrous α�瞤hase, and cold deformation property was poor, about 40%. The bar hot�瞨olled at 1000 ℃ possessed more β�瞤hase, the cold deformation reached up to 60%, and showed higher compression rate and lower work�瞙ardening rate. The cold�瞨olling formability of TC20 alloy bar had a strong correlation with its room temperature compression performance, the bars with higher compression rate and lower hardening rate in the plastic deformation stage had better cold roll formability.