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    • 9. 发明申请
    • Method for producing low thermal expansion Ni-base superalloy
    • 生产低热膨胀Ni基超级合金的方法
    • US20050236079A1
    • 2005-10-27
    • US11115159
    • 2005-04-27
    • Shigeki UetaToshiharu NodaRyuichi YamamotoYoshikuni KadoyaRyotaro MagoshiShin Nishimoto
    • Shigeki UetaToshiharu NodaRyuichi YamamotoYoshikuni KadoyaRyotaro MagoshiShin Nishimoto
    • C22C19/03C22C19/05C22F1/00C22F1/10
    • C22C19/056C22C19/03C22C19/057C22C19/058C22F1/10
    • The present invention provides a method for producing a low thermal expansion Ni-base superalloy, which includes: preparing an alloy including, by weight %, C: 0.15% or less, Si: 1% or less, Mn: 1% or less, Cr: 5 to 20%, at least one of Mo, W and Re, which satisfy the relationship Mo+½(W+Re): 17 to 27%, Al: 0.1 to 2%, Ti: 0.1 to 2%, Nb and Ta, which satisfy the relationship Nb+Ta/2: 1.5% or less, Fe: 10% or less, Co: 5% or less, B: 0.001 to 0.02%, Zr: 0.001 to 0.2%, a reminder of Ni and inevitable components; subjecting the alloy to a solution heat treatment under the condition of at a temperature of 1000 to 1200° C.; subjecting the alloy to either a carbide stabilizing treatment for making aggregated carbides on grain boundaries and stabilizing the carbides under the conditions of at a temperature of not less than 850° C. and less than 1000° C. and for 1 to 50 hours, or a carbide stabilizing treatment for making aggregated carbides on grain boundaries and stabilizing the carbides by cooling from the temperature in the solution heat treatment to 850° C. at a cooling rate of 100° C. or less per hour; subjecting the alloy to a first aging treatment for precipitating γ′ phase under the conditions of at a temperature of 720 to 900° C. and for 1 to 50 hours; and subjecting the alloy to a second aging treatment for precipitating A2B phase under the conditions of at a temperature of 550 to 700° C. and for 5 to 100 hours.
    • 本发明提供一种低热膨胀型Ni基超合金的制造方法,其特征在于,包括:以重量%计含有C:0.15%以下,Si:1%以下,Mn:1%以下的合金, Cr:5〜20%,满足Mo +½(W + Re):17〜27%,Al:0.1〜2%,Ti:0.1〜2%的Mo,W和Re中的至少一种,Nb 和Ta,其满足Nb + Ta / 2:1.5%以下的关系,Fe:10%以下,Co:5%以下,B:0.001〜0.02%,Zr:0.001〜0.2%,提示Ni 和不可避免的组成部分; 在1000〜1200℃的温度下对合金进行固溶热处理; 使合金进行碳化物稳定化处理,在晶界上形成凝集碳化物,并在不低于850℃且小于1000℃的温度和1至50小时的条件下稳定碳化物,或 碳化物稳定化处理,用于通过从固溶热处理中的温度冷却至850℃,以每小时100℃或更低的冷却速度使晶界上的聚集碳化物稳定化; 在720〜900℃的温度和1〜50小时的条件下对合金进行第一时效处理以使γ相析出; 并在550-700℃的温度和5〜100小时的条件下对该合金进行第二时效处理以沉淀A 2 B相。