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Ni9钢微观结构的TEM研究
TEM STUDY OF MICROSTRUCTURES OF STEEL Ni9
【摘要】 利用TEM研究了Ni9钢中马氏体与奥氏体的微观结构。结果表明,多数回火奥氏体不是严格地按K-S或N-W关系析出,而是在这两种取向附近变化:在同一马氏体束内,奥氏体可按上述近似关系的不同变体析出;回火奥氏体主药第马氏体晶界析出,呈板条状,惯习面为(335)(γ')∥(341)α,奥氏体向马氏体转变时易形成马氏体孪晶,这些孪晶在随后的回火过程中消失
【Abstract】 The microstructures of martensite and austenite in steel Ni9 treated under 800℃1 h, WQ+670℃1 h, WQ+585℃1 h, WQ were investegated with TEM. Most of tempered austenite particles do not precipetate according to theoritical K-S or N-W orientation relationship (OR) with martensite martrix, but have small deviation from these two ORs. In a martensite lath packet, the different austenite variants with the above approximate ORs are pricipetalted. The lath-like tempered austenite precipetates along martensite boundaries with habit plane (335)γ’∥(341)α. Martensite twins form when austenite transformed into martensite. These twins disappear during tempering.
- 【文献出处】 金属学报 ,ACTA METALLRUGICA SINICA , 编辑部邮箱 ,1996年11期
- 【分类号】TG142.1
- 【被引频次】7
- 【下载频次】196