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    • 141. 发明授权
    • Process for producing high toughness, high strength steel having
excellent resistance to stress corrosion cracking
    • 具有优异的耐应力腐蚀开裂性的高韧性高强度钢的制造方法
    • US4826543A
    • 1989-05-02
    • US120315
    • 1987-11-13
    • Seinosuke YanoYoshihiro OkamuraKatsuo KakuJunichi Kobayashi
    • Seinosuke YanoYoshihiro OkamuraKatsuo KakuJunichi Kobayashi
    • C21D8/02C22C38/00C22C38/08C22C38/16C21D8/00
    • C22C38/08C21D8/0205
    • A process for producing a high toughness, high strength steel having excellent resistance to stress corrosion cracking including the steps of: preparing a steel slab including 0.02 to 0.10 wt % of C, 0.50 wt % or less Si, 0.4 to 1.5 wt % Mn, 1.0 to 7.5 wt % Ni, more than 1.0 wt % up to 1.5 wt % Mo, 0.80 wt % or less Cr, 0.01 to 0.08 wt % sol. Al, and the balance of Fe and unavoidable impurities; heating the steel slab to a temperature of from 1000.degree. C. to 1250.degree. C.; hot rolling the heated steel slab at a finishing nip temperature of from 700.degree. C. to 880.degree. C., at a total reduction rate of 40% or more effected at the finishing nip temperature or lower, and at a finishing temperature of 650.degree. C. or higher, to provide a steel plate; then quenching the steel plate by initiating water cooling at a temperature of the A.sub.r3 point thereof or higher and by terminating the water cooling at a temperature of 150.degree. C. or lower; and tempering the quenched steel plate at a temperature of the A.sub.c1 point thereof or lower.
    • 一种制造具有优异的耐应力腐蚀开裂性的高韧性高强度钢的方法,包括以下步骤:制备包括C:0.02〜0.10重量%,Si:0.50重量%以下,Si:0.4〜1.5重量%的Mn, 1.0〜7.5重量%的Ni,大于1.0重量%,至多1.5重量%的Mo,0.80重量%以下的Cr,0.01〜0.08重量%的溶胶。 Al,余量为Fe和不可避免的杂质; 将钢坯加热至1000℃至1250℃的温度; 在700℃〜880℃的最终辊隙温度下热轧钢板,在最终辊隙温度以下,终轧温度650℃以下,总还原率为40%以上。 C.以上,提供钢板; 然后通过在Ar 3点以上的温度下进行水冷而通过在150℃以下的温度下终止水冷而淬火钢板; 并在其Ac1点以下的温度下回火淬火的钢板。