锻压技术

TA15钛合金扁坯组织对超声波探伤及性能的影响

英文标题：Influence of TA15 titanium alloy slab structure on ultrasonic flaw detection and performance

分类号：TG319；TG146.23

出版年,卷(期):页码：2021,46(12):228-235

摘要：

采用不同超声波探伤方法对TA15钛合金扁坯锻件进行超声波检测，研究了超声波探伤与组织性能间的关系。结果表明：TA15钛合金扁坯局部区域采用I3-1008-R（10 MHz平探头）检测到杂波超标，而采用HGE-5827-A（10 MHz聚焦探头）、I7-0512-RG（5 MHz聚焦探头）、I3-0508-3（5 MHz平探头）3种探头对杂波超标区域进行C扫检测，异常显示信号具有一定的方向性，但所有评定结果均合格；探伤超标区域埋深处纵向低倍组织中存在细条状的晶粒流线分布，高倍组织为典型的双态组织，其α相含量、形态及力学性能与探伤正常区域无明显差异。通过逐层组织对比分析，可确定探伤超标区域非锻造和冶金缺陷，而是扁宽状晶粒流线导致的异常信号显示。

The ultrasonic testing of TA15 titanium alloy slab forgings was conducted by different ultrasonic flaw detection methods, and the relationship between ultrasonic flaw detection and microstructure performance was studied. The results show that the excessive clutter is detected in local area of TA15 titanium alloy slab by I3-1008-R(10 MHz flat probe), and when the three probes of HGE-5827-A(10 MHz focusing probe), I7-0512-RG (5 MHz focusing probe), I3-0508-3 (5 MHz flat probe) three probes are used to C-scan detecting of excessive clutter area, the abnormal signals show certain directionality, but all the evaluation results are qualified. Furthermore, there is a thin strip-like grain streamline distribution in the longitudinal low magnification microstructure in the buried depth of exceeding area of flaw dection, while the high magnification microstructure is a typical two-state microstructure, and the content, morphology and mechanical properties of α phase are not significantly different from the normal area of flaw detection. By comparative analysis of microstructure layer by layer, it can be determined that the exceeding area of flaw detection is not forging and metallurgical defects, but the abnormal signal display caused by the flat and wide grain streamline.

基金项目：

杨立新(1983-)，男，工学学士，高级工程师 E-mail：lixinyang198303@163.com

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