KR101545846B1 Pre- stressed concrete steel strand with superior resistance against hydrogen delayed fracture and method for producing the same
有权
基本信息:
- 专利标题: Pre- stressed concrete steel strand with superior resistance against hydrogen delayed fracture and method for producing the same
- 专利标题(中):具有抗氢延迟断裂的超级电阻的预应力混凝土钢带及其制造方法
- 申请号:KR20150059516 申请日:2015-04-28
- 公开(公告)号:KR101545846B1 公开(公告)日:2015-08-20
- 发明人: JUNG JIN YOUNG , KIM JIN HO
- 申请人: KISWIRE LTD
- 专利权人: KISWIRE LTD
- 当前专利权人: KISWIRE LTD
- 优先权: KR20150059516 2015-04-28
- 主分类号: C22C38/00
- IPC分类号: C22C38/00 ; B21C1/02 ; D07B5/00
본 발명의 피씨 강연선은, wt%로 C 0.9 ∼ 1.2%, Mn 0.4 ∼ 0.7%, Si 0.4 ∼ 0.7%, P 0.01% 이하, S 0.01% 이하, Zr 0.005 ∼ 0.5%, W 0.005 ∼ 0.5%, Mg 0.005 ∼ 0.5%, 잔부 Fe와 기타 불가피한 불순물로 이루어진 선재를 신선하고, 그 신선선 7가닥을 하나의 심선 주위에 6가닥의 외층선이 꼬이도록 연선하여 이루어진 강연선으로서, 신선 중에 고주파 열처리에 의해 100 ∼ 500nm 크기의 Zr, W, Mg계 석출물이 신선선 전체에 분포되고, 연선 중의 고주파 처리에 의해 강선의 표면으로부터 50㎛ 깊이까지 구상화 시멘타이트가 형성된다.
The present invention relates to a high strength, yet hydrogen delayed fracture properties are excellent building PC strand and its manufacturing method.
The present invention of the PC strand has, wt% in C 0.9 ~ 1.2%, Mn 0.4 ~ 0.7%, Si 0.4 ~ 0.7%, P 0.01% or less, S 0.01% or less, Zr 0.005 ~ 0.5%, W 0.005 ~ 0.5%, Mg 0.005 ~ 0.5%, the balance Fe and other unavoidable impurities, consisting of wire, fresh, and its fresh lines 7 strands of a single core wire around the six strands of the outer wires twisted so stranded and composed of strands as, fresh during high-frequency heat treatment by 100 to 500nm being distributed throughout the line Zr, W, Mg-based precipitate is fresh in size, the spheroidized cementite formed by 50㎛ depth from the surface of the steel wire treated by a high frequency of twisted pair.
信息查询:
EspacenetIPC结构图谱:
C | 化学;冶金 |
--C22 | 冶金;黑色或有色金属合金;合金或有色金属的处理 |
----C22C | 合金(合金的处理入C21D、C22F) |
------C22C38/00 | 铁基合金,例如合金钢(铸铁合金入C22C37/00) |