Cu添加低合金鋼の機械的特性に及ぼす二相域焼入れの影響 / Effect of Intercritical Quenching on Mechanical Properties of Cu-containing Low Alloy Steel
- Resource Type
- Journal Article
- Authors
- Gen Sasaki; Kotobu Nagai; Kunihiko Hashi; Takuya Okawa; Yuta Honma; 佐々木 元; 大川 琢哉; 本間 祐太; 橋 邦彦; 長井 寿
- Source
- 鉄と鋼 / Tetsu-to-Hagane. 2017, 103(10):579
- Subject
- ASTM A707
Cu containing low alloy steel
effective grain size
intercritical quenching
lamellarizing
mechanical property
- Language
- Japanese
- ISSN
- 0021-1575
1883-2954
The lamellarizing brought about a complicated microstructure with meandered high angle grain boundaries (HAGB) and fine grains bordered by the HAGB. The final microstructure was composed of granular bainitic ferrites without retained γ and basically dual of a softer phase and a harder phase. The softer phase inherited the not-transformed α phase region in lamellarizing and contained coarse Cu precipitates. The harder phase inherited the transformed γ phase region in lamellarizing and contained no Cu precipitates. Hence, over-aging of Cu precipitation in the softer phase might result in the slight decrease in yield strength.