acicular ferrite microstructure的用法和样例：
- Experimental results show that the high strength pipeline steel with acicular ferrite microstructure has higher ability to prevent impact cracking than that with ferrite pearlitic microstructure.
- The result showed that the microstructure dominated by fine and homogeneous acicular ferrite had the better resistance to SSCC.
- The microstructure of deposit is mainly acicular ferrite when Si content is low, and block ferrite when Si content is high.
- By taking reasonable hot-rolling process,the microstructure of X70 production was mainly acicular ferrite,and its strength and toughness were good enough to satisfy the...