Effect of pickling on surface contamination layer and chemical composition of ZTA15 titanium alloy

Han Yunfei; Sun Bing; Liu Yihui; Hou Peihua; Yuan Bingbing; Qiao Haibin

doi:10.7513/j.issn.1004-7638.2023.03.011

Volume 44 Issue 3

Jun. 2023

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Han Yunfei, Sun Bing, Liu Yihui, Hou Peihua, Yuan Bingbing, Qiao Haibin. Effect of pickling on surface contamination layer and chemical composition of ZTA15 titanium alloy[J]. IRON STEEL VANADIUM TITANIUM, 2023, 44(3): 75-79. doi: 10.7513/j.issn.1004-7638.2023.03.011

Citation:

Han Yunfei, Sun Bing, Liu Yihui, Hou Peihua, Yuan Bingbing, Qiao Haibin. Effect of pickling on surface contamination layer and chemical composition of ZTA15 titanium alloy[J]. IRON STEEL VANADIUM TITANIUM, 2023, 44(3): 75-79. doi: 10.7513/j.issn.1004-7638.2023.03.011

Citation:

Han Yunfei, Sun Bing, Liu Yihui, Hou Peihua, Yuan Bingbing, Qiao Haibin. Effect of pickling on surface contamination layer and chemical composition of ZTA15 titanium alloy[J]. IRON STEEL VANADIUM TITANIUM, 2023, 44(3): 75-79. doi: 10.7513/j.issn.1004-7638.2023.03.011

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Effect of pickling on surface contamination layer and chemical composition of ZTA15 titanium alloy

doi: 10.7513/j.issn.1004-7638.2023.03.011

Han Yunfei^{1, 2
,},
Sun Bing^{1, 2},
Liu Yihui^{1, 2},
Hou Peihua^{1, 2},
Yuan Bingbing^{1, 2},
Qiao Haibin^{1, 2}

1.
Luoyang Sunrui Titanium Precision Casting Co., Ltd., Luoyang 471000, Henan, China
2.
Luoyang Ship Material Research Institute, Luoyang 471000, Henan, China

Received Date: 2023-02-14
Publish Date: 2023-06-30

Abstract

Abstract

The ZTA15 titanium alloy test bars were prepared by investment casting technology. The thickness of the surface contamination layer was observed and measured by metallography, and then the pickling amount was determined. Before and after pickling, the removal of the contaminated layer was determined by the two-point diameter measurement and metallographic method. After pickling treatment, vacuum annealing was also carried out. The chemical composition was tested from the surface of test bars in three states to detect the change of hydrogen and oxygen content. The effect of acid pickling on the surface contamination layer and chemical composition of ZTA15 titanium alloy was studied. The results show that the thickness of the contaminated layer on the surface of ZTA15 titanium alloy is 0.1～0.2 mm. When hydrofluoric acid, nitric acid and hot water in the pickling solution are prepared according to the mass ratio of 30%: 30%: 40%, the temperature is 40～60 ℃, the pickling time is within 60 min, and the pickling amount is (0.25±0.05 )mm, the α contaminated layer with high hardness and low plasticity can be completely removed to avoid embrittlement or crack during subsequent deformation or stress, and improve its service performance. After pickling, the surface of ZTA15 titanium alloy has slight hydrogen absorption, no obvious change in oxygen content. Hydrogen evolution occurs after vacuum annealing, but the hydrogen content on the surface always meets the requirement of <0.01%. Hydrogen embrittlement and other adverse conditions on the composition performance are not to be generated.
- ZTA15 titanium alloy,
- pickling,
- surface contamination layer,
- chemical composition

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References(13)

References

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