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KR101778398B1 용접 후 열처리 저항성이 우수한 압력용기 강판 및 그 제조방법 有权
焊接后的耐热处理性优良的压力容器用钢板及其制造方法

  • 专利标题： 용접 후 열처리 저항성이 우수한 압력용기 강판 및 그 제조방법
  • 专利标题（英）： Pressure vessel steel plate having excellent property after post weld heat treatment and method for manufacturing the same
  • 专利标题（中）： 焊接后的耐热处理性优良的压力容器用钢板及其制造方法
  • 申请号： KR1020150181285
    申请日： 2015-12-17
  • 公开(公告)号： KR101778398B1
    公开(公告)日： 2017-09-14
  • 发明人: 홍순택
  • 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)
  • 代理商 특허법인씨엔에스
  • 主分类号： C22C38/52
  • IPC分类号： C22C38/52 ;  C22C38/48 ;  C22C38/46 ;  C22C38/44 ;  C22C38/42 ;  C21D8/02
용접 후 열처리 저항성이 우수한 압력용기 강판 및 그 제조방법
摘要：
본발명은장시간의용접후 열처리(PWHT, Post Weld Heat Treatment, PWHT)를행해도강도및 인성의저하가발생하지않는 PWHT 저항성이우수한발전소의보일러, 압력용기등 350~600℃정도의중고온압력용기강판에관한것으로서, 중량%로 C:0.05~0.17%, Si:0.50~1.00%, Mn:0.3~0.8%, Cr:1.0~1.5%, Mo:0.3~1.0%, Ni:0.003~0.30%, Cu:0.003~0.30%, Sol.Al:0.005~0.06%, P:0.015%이하, S:0.020%이하를포함하고, Nb: 0.002~0.025%, V: 0.002 ~ 0.03% 및 Co: 0.002~0.15% 중선택된 2종이상의원소를추가로포함하며, 나머지는 Fe 및불가피한불순물을포함하고, 강판의중심부미세조직이 20 면적% 이상의템퍼드마르텐사이트와잔부베이나이트의혼합조직으로이루어진 PWHT저항성이우수한압력용기강판및 그제조방법에관한것이다.
摘要（中）：

将要执行的焊接很长时间热处理（PWHT，焊后热处理，PWHT）后，本发明的强度和韧性的劣化发生高电站，压力容器的焊后热处理电阻锅炉，如350〜600℃的高温和大约压力 它涉及到容器钢板重量％C A：0.05〜0.17％以下，Si：0.50〜1.00％以下，Mn：0.3〜0.8％以下，Cr：1.0〜1.5％以下，Mo：0.3〜1.0％以下，Ni：0.003〜0.30％ 以下，Cu：0.003〜0.30％，Sol.Al:0.005~0.06%，P：0.015％以下，S：0.002〜0.025％，V ::包含小于0.020％，Nb和0.002〜0.03％和Co：0.002〜 还包括在所选择的2种0.15％的元素，其余是和由Fe的混合结构的PWHT电阻不可避免的包括杂质，与钢板20面积％以上的回火马氏体，余量贝氏体的显微组织的中心 一种优良的压力容器钢板及其制造方法。

摘要（英）：

The present invention after welding for a long time heat treatment (PWHT, Post Weld Heat Treatment, PWHT) to be performed strength and that the deterioration of toughness occur PWHT resistance is used on a pressure of about 350 ~ 600 ℃ such as boilers, pressure vessels of the superior plants It relates to a container steel sheet in weight% C: 0.05 ~ 0.17%, Si: 0.50 ~ 1.00%, Mn: 0.3 ~ 0.8%, Cr: 1.0 ~ 1.5%, Mo: 0.3 ~ 1.0%, Ni: 0.003 ~ 0.30% , Cu: 0.003 ~ 0.30%, Sol.Al:0.005~0.06%, P: 0.015% or less, S: 0.002 ~ 0.025%, V:: contains less than 0.020%, Nb and 0.002 ~ 0.03% and Co: 0.002 ~ further comprising two or more kinds of elements selected from 0.15%, the rest is PWHT resistance made of a mixed structure of Fe and unavoidable including impurities, and the center of the microstructure of the steel sheet 20 area% or more tempered martensite with the balance bainite It relates to a high pressure vessel steel sheet and a method of manufacturing the same.

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