粉末粒度对钛合金闭式叶轮成形的影响

尚学文, 崔潇潇, 徐磊, 卢正冠

Effect of Powder Particle Size on Forming Titanium Alloy Shrouded Impeller

SHANG Xuewen, CUI Xiaoxiao, XU Lei, LU Zhengguan

表2 不同成形方式的Ti-5Al-2.5Sn超低间隙(ELI)合金力学性能对比^[16,17]

Table 2 Comparisons of mechanical properties of Ti-5Al-2.5Sn extra-low interstitial (ELI) alloys with different forming methods^[16,17]

Forming method	Temperature	$σ_{U T S}$ / MPa	$σ_{Y S}$ / MPa	EL / %
PM-HIP	RT	885	0836	17.5
(powder 1#)		886	0834	18.5
	77 K	1290	1180	19.5
		1277	1188	20.0
	20 K	1553	1461	18.5
		1559	1430	20.0
		1278	1215	15.5
Wrought^[16]	RT	848	-	18.0
	77 K	1290	-	13.5
	20 K	1587	-	15.0
Cast^[17]	RT	741	0685	13.0
		744	0690	7.0
	20 K	1288	-	10.0
		1294	-	7.5