二次枝晶取向对镍基高温合金晶粒竞争生长行为的影响

二次枝晶取向对镍基高温合金晶粒竞争生长行为的影响

张小丽, 冯丽, 杨彦红, 周亦胄, 刘贵群

Influence of Secondary Orientation on Competitive Grain Growth of Nickel-Based Superalloys

ZHANG Xiaoli, FENG Li, YANG Yanhong, ZHOU Yizhou, LIU Guiqun

表1 试样的结构特征和铸造条件

Table 1 Structural characteristics and casting conditions of samples

Seed pattern	Exp.		[001]orientation			[010]/[010]orientation			Withdrawal speed mm·min^-1
			θ_A1 / (o)	θ_B / (o)	θ_A2 / (o)	θ_A1 / (o)	θ_B / (o)	θ_A2 / (o)	Withdrawal speed mm·min^-1
Bi-crystal	Ⅰ	1-1	0	-	0	0	-	0	6
		1-2						2
		1-3						4
		1-4						6
		1-5						8
		1-6						10
		1-7						12
		1-8						14
		1-9						16
		1-10						18
		1-11						20
		1-12						30
		1-13						45
Ter-crystal	Ⅱ	2-1	0±1	17±1	0±1	0	0	0	1
		2-2				0	0	0	6
	Ⅲ	3-1				0	45	0	1
		3-2				0	45	0	6
	Ⅳ	4-1				45	0	45	1
		4-2				45	0	45	6