固溶处理温度对GH3625合金热挤压管材微观组织和力学性能的影响

doi:10.11896/j.issn.1005-023X.2018.08.020

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Abstract The influence of solution temperature on microstructure and mechanical properties of GH3625 alloy hot extruded tube were investigated by SEM, EDS, XRD, etc. The results indicated that 1 120 ℃ was a turning point in the microstructure and mechanical properties of alloys. When the solution treatment temperature was between 910 ℃ and 1 120 ℃, the grain hardness increased and the strength decreased slowly because of the pinning of NbC phase at grain boundary. When the solution temperature exceeded 1 120 ℃, the NbC phase was dissolved in a large amount, the pinning effect was weakened, the grain size increased rapidly, the hardness and strength of the alloy decreased obviously. With the increasing temperature, the dimples in alloy fractwre became large and deep and the plasticity gradually increased. When the temperature exceeded 1 120 ℃, there were mainly dimples in tensile fracture. In conclusion, the optimum solution treatment temperature of GH3625 alloy hot extrusion tube is 1 120 ℃.

Key words： GH3625 alloy solution treatment microstructure mechanical properties

Published: 11 May 2018

CLC number:

TG142.71

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	Articles by authors
	DING Yutian
	MA Yuanjun
	DOU Zhengyi
	LIU Jianjun
	GAO Yubi
	MENG Bin

Cite this article:

DING Yutian,MA Yuanjun,DOU Zhengyi, et al. Effect of Solution Treatment Temperature on Microstructure and Mechanical Properties of GH3625 Alloy Hot Extruded Tube[J]. Materials Reports, 2018, 32(8): 1311-1317.

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http://www.mater-rep.com/EN/10.11896/j.issn.1005-023X.2018.08.020 OR http://www.mater-rep.com/EN/Y2018/V32/I8/1311

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