[1]侯智敏,赵永庆,张鹏省,等.固溶工艺对Ti12LC合金组织性能的影响[J].中国材料进展,2014,(8):060-61.[doi:10.7502/j.issn.1674-3962.2014.08.08]
　HOU Zhimin,Zhao Yongqing,Zhang Pengsheng,et al.Effect of solution treatment on Microstructure and Properties of Ti12LC Alloy[J].MATERIALS CHINA,2014,(8):060-61.[doi:10.7502/j.issn.1674-3962.2014.08.08]
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固溶工艺对Ti12LC合金组织性能的影响()
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中国材料进展[ISSN:1674-3962/CN:61-1473/TG]

卷:
期数:
2014年第8期
页码:
060-61
栏目:
研究报告
出版日期:
2014-08-31

文章信息/Info

Title:
Effect of solution treatment on Microstructure and Properties of Ti12LC Alloy
作者:
侯智敏1; 2;  赵永庆1; 2;  张鹏省1;  毛小南1;  尹雁飞1;  李思兰1

1．西北有色金属研究院 钛合金研究所，陕西 西安710016

2．西北工业大学 材料学院，陕西 西安710072

Author(s):
HOU Zhimin1; 2;  Zhao Yongqing1; 2;  Zhang Pengsheng1;  MAO Xiaonan1;  Yin Yanfei1;  LI Silan1
1. Titanium Alloy Research Center, Northwest Institute for Non-ferrous Metal Research, Xi’an 710016

2. School of Materials Science and Engineering, Northwest Polytechnical University, Xi’an 710072

关键词:
 ; Ti12LC合金; 双重固溶; 强韧化
DOI:
10.7502/j.issn.1674-3962.2014.08.08
文献标志码:
A
摘要:
Ti2LC合金是西北有色金属研究院研制的一种低成本钛合金，用于取代TC11合金进行推广应用。本文对φ420mm Ti12LC合金铸锭进行常规锻造，得到等轴组织的φ170mm Ti12LC合金棒材。采用单重固溶+时效、双重固溶+时效两种不同的工艺对等轴组织的Ti12LC合金进行热处理，分析不同固溶工艺对Ti12LC合金显微组织及室温拉伸、室温冲击性能的影响。研究表明，在相同的固溶冷却速率下，增加单重固溶温度，初生等轴α相含量减少，强度增加、塑性减小、冲击韧性减小。单重固溶+时效热处理后合金冲击韧性低，强韧性匹配差。与单重低温固溶+时效相比，高温预固溶慢冷+低温固溶后，初生α相尺寸及相含量变化不明显，但可以获得更大尺寸的次生α相，合金的塑性稍有降低、强度增加、冲击韧性改善明显，综合力学性能匹配良好。
Abstract:
The low cost Ti12LC titanium alloy was developed by Northwest Institute for Non-ferrous Metal Research to replace TC11 titanium alloy. The φ420mm Ti12LC cast ingot was forged by conventional process, and worked in φ170mm equiaxed bars finally. The equiaxed Ti12LC alloys were single and duplex solution treated separately, and then aged at 540℃for 6h. The effects of different solution processes on the morphology and mechanical properties, especially the impact toughness were analyzed. The results show that the content of primary equiaxedαphase, the plasticity and the impact toughness decreases, but the strength of the alloy increases, while the increase of solution temperature in α+βphase field for single solution + aging heat treatments in same solution cooling rate. The single solution + aging heat treatment alloys have low impact toughness, which means that the impact toughness and strength are mismatched. Compared with single solution at low temperature, pre-solution at the upperα+βphase field followed by furnace, and then re-solution treated at low temperature can resulted in larger dimension secondaryαphase, higher strength and impact toughness, while the plasticity decreases in acceptable range, the content and dimension of primaryαphase change little. The combined mechanical properties of the Ti12LC alloys heat treated by duplex solution + ageing, match well.
更新日期/Last Update: 2014-09-02