利索-全球专利检索

  1. 登录
  2. 注册
发明公开
CN105579597A 高强度不锈钢管的制造方法及高强度不锈钢管 无效 - 驳回 复审申请

高强度不锈钢管的制造方法及高强度不锈钢管
摘要：
本发明提供韧性优良的高强度不锈钢管的制造方法。一种韧性优良的高强度不锈钢管的制造方法，其特征在于，将成分组成以质量％计含有C：0.005～0.05％、Si：0.05～1.0％、Mn：0.2～1.8％、P：0.03％以下、S：0.005％以下、Cr：14～20％、Ni：1.5～10％、Mo：1～5％、V：0.5％以下、N：0.15％以下、O：0.01％以下、Al：0.002～0.1％且余量由Fe和不可避免的杂质构成的钢原材制成预定尺寸的钢管，对该钢管反复进行两次以上的再加热至750℃以上的温度后以空冷以上的冷却速度冷却至100℃以下的淬火处理，并且，在所述淬火处理中，最终的淬火处理在χ相和M23C6的析出温度以上的温度下进行，接着在700℃以下的温度下实施回火处理。
摘要（英）：

Provided is a method for producing a high-strength stainless steel pipe which exhibits excellent toughness. This method for producing a high-strength stainless steel pipe which exhibits excellent toughness involves making a steel pipe of prescribed dimensions from a steel material having a component composition comprising, in mass%, 0.005-0.05% of C, 0.05-1.0% of Si, 0.2-1.8% of Mn, 0.03% or less of P, 0.005% or less of S, 14-20% of Cr, 1.5-10% of Ni, 1-5% of Mo, 0.5% or less of V, 0.15% or less of N, 0.01% or less of O, and 0.002-0.1% of Al, with Fe and inevitable impurities constituting the remainder, and is characterized in that: after reheating to a temperature of 750 DEG C or higher, the steel pipe is subjected to a quenching treatment two or more times for cooling to a temperature of 100 DEG C or less at a cooling speed of air cooling or faster; the last quenching treatment of the quenching treatments is performed at a temperature equal to or greater than the precipitation temperature of the chi-phase and M23C6; and a tempering treatment is performed at a temperature of 700 DEG C or less.

0/0