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    • 2. 发明申请
    • HIGHLY CORROSION-RESISTANT MARTENSITIC STAINLESS STEEL WITH EXCELLENT WELDABILITY AND PROCESS FOR PRODUCING THE SAME
    • 具有优异耐焊接性的高耐腐蚀性马氏体不锈钢及其制造方法
    • WO1996010654A1
    • 1996-04-11
    • PCT/JP1995001950
    • 1995-09-27
    • NIPPON STEEL CORPORATIONHARA, TakuyaASAHI, HitoshiTAMEHIRO, HiroshiMURAKI, TaroKAWAKAMI, Akira
    • NIPPON STEEL CORPORATION
    • C22C38/42
    • C22C38/42C21D1/18C21D8/0205C21D2211/008
    • Martensitic stainless steel excellent in weldability and SSC resistance and having a tempered martensitic structure which contains on the weight basis 0.005 - 0.035 % of C, at most 0.50 % of Si, 0.1 - 1.0 % of Mn, at most 0.03 % of P, at most 0.005 % of S, 1.0 - 3.0 % of Mo, 1.0 - 4.0 % of Cu, 1.5 - 5.0 % of Ni, at most 0.06 % of Al, at most 0.01 % of N and such an amount of Cr as to satisfy the relationship that 13 > Cr + 1.6 Mo >/= 8, satisfies the relationship that C + N /= -10, optionally contains further at least one element selected from among 0.05 - 0.1 % of Ti, 0.01 - 0.2 % of Zr, 0.001 - 0.02 % of Ca and 0.003 - 0.4 % of REM, the balance substantially comprising Fe. The process for producing the steel comprises hot rolling the billet of the same into a steel plate, austenizing the plate at a temperature in the range of the Ac3 point to 1,000 DEG C, followed by hardening, and subjecting to final tempering at a temperature in the range of 550 DEG C to the Ac1 point, followed by cold forming.
    • 具有良好的焊接性和耐SSC性的马氏体不锈钢,并且具有回火马氏体组织,其重量基于0.005-0.035%的C,至多0.50%的Si,0.1-1.0%的Mn,至多0.03%的P,在 大部分S为0.005%,Mo为1.0-3.0%,Cu为1.0-4.0%,Ni为1.5-5.0%,Al最多为0.06%,最多为0.01%,Cr的含量为 13 + Cr + 1.6 Mo> / = 8的关系满足C + N <0.03和40C + 34N + Ni + 0.3Cu-1.1Cr> / = -10的关系,任选地还包含至少一个元素选择 从0.05-0.1%的Ti,0.01-0.2%的Zr,0.001-0.02%的Ca和0.003-0.4%的REM中,余量基本上包含Fe。 钢的制造方法包括将钢坯热轧成钢板,在Ac3点的范围内的温度下将板奥氏体化为1000℃,然后硬化,并在 范围为550℃至Ac1点,然后冷成型。