基本信息:
- 专利标题: 오스테나이트계 스테인리스 냉연강판을 제조하기 위한 저온 고속 산세 프로세스
- 专利标题(英):High speed pickling process at low temperature for austenitic stainless cold strip
- 专利标题(中):用于奥氏体不锈钢条的低温高速切割工艺
- 申请号:KR1020120084150 申请日:2012-07-31
- 公开(公告)号:KR101353856B1 公开(公告)日:2014-01-21
- 发明人: 김진석 , 이용헌 , 김지훈
- 申请人: 주식회사 포스코
- 申请人地址: 경상북도 포항시 남구 동해안로 **** (괴동동)
- 专利权人: 주식회사 포스코
- 当前专利权人: 주식회사 포스코
- 当前专利权人地址: 경상북도 포항시 남구 동해안로 **** (괴동동)
- 代理人: 특허법인씨엔에스
- 主分类号: C23G1/08
- IPC分类号: C23G1/08 ; C23G3/00
摘要:
The present invention relates to a method for pickling a surface of a steel plate with a mixed acid solution without nitric acid in low temperatures at a high speed for manufacturing an austenite type stainless cold rolled steel plate which needs a high surface quality. Provided is a high chrome austenite type stainless cold rolled steel plate for removing a silicon oxide from a cold rolled steel plate by dipping the cold rolled steel plate in a mixed acid solution which practically does not contain an iron ion, and contains 110-150 g/l of sulfuric acid, 25-40 g/l of free hydrofluoric acid, and more than or equal to 5.5 g/l of a hydrogen peroxide concentration in an initial composition, and does not contain nitric acid. According to the present invention, since nitric acid is not contained when an austenite type stainless cold rolled steel plate is pickled, the process is capable of reducing burden of installation of DeNOx facilities, and NOx removal facilities. Furthermore, the process is easily controlled, and suitable for high speed manufacture since pickling can be controlled by a hydrogen peroxide concentration and a hydrofluoric acid concentration. After pickling, since a quality is increased in comparison with a conventional pickling method, an austenite type stainless cold rolled steel plate with an excellent quality can be manufactured. [Reference numerals] (AA) Valid hydrogen peroxide concentration (g/L); (BB) Iron ion concentration (g/L)
摘要(中):
本发明涉及一种用于制造需要高表面质量的奥氏体型不锈钢冷轧钢板,在高温下用无硝酸混合酸溶液酸洗钢板表面的方法。 本发明提供一种高铬奥氏体型不锈钢冷轧钢板,其通过将冷轧钢板浸渍在实际上不含铁离子的混合酸溶液中,从冷轧钢板中除去氧化硅,并含有110-150g / l的硫酸,25-40g / l的游离氢氟酸,以及在初始组合物中多于或等于5.5g / l的过氧化氢浓度,并且不含有硝酸。 根据本发明,当奥氏体型不锈钢冷轧钢板酸洗时,不含有硝酸,因此能够减少DeNOx设备的安装负担和NOx去除设备。 此外,该方法容易控制,并且适用于高速制造,因为酸洗可以通过过氧化氢浓度和氢氟酸浓度来控制。 酸洗后,由于与现有的酸洗方法相比质量提高,所以可以制造质量优异的奥氏体型不锈钢冷轧钢板。 (附图标记)(AA)有效的过氧化氢浓度(g / L); (BB)铁离子浓度(g / L)