【摘要】 采用拉伸试验、热模拟和晶间腐蚀试验方法对铁镍基耐蚀合金NS1402的力学性能、热加工性能以及晶间腐蚀性能进行了研究。结果表明:NS1402合金热加工过程中,动态回复、再结晶发生的临界条件不易满足。其适宜的热加工温度区间为1050℃～1200℃。NS1402合金力学性能与合金元素含量、加工工艺以及热处理制度有关,加工工艺特别是锻造(轧制)变形比是影响力学性能的关键因素。不同冷却方式影响NS1402合金耐晶间腐蚀性能,水冷、空冷均能满足技术条件要求。对NS1402合金,C含量小于0.035%均能满足技术条件要求。NS1402合金既能通过ASTM A 26-02C法对晶间腐蚀的检测,也能通过ASTM G 28-02A法的检测。采用前者更适宜评价其晶间腐蚀性能。更多还原

【Abstract】 Using tensile test, hot simulation and intergranular corrosion test, the mechanical property, hot working property and intergranular corrosion property of alloy NS1402 were researched. The results showed that during hot working, the dynamic recovery and recrystallization were not easy to occur; the suitable temperature for hot working is between 1 050 ℃ and 1 200 ℃; the mechanical properties of alloy NS1402 is related to the contents of elements, processing technology and heat treatment; heating process, especially the deformation ratio of forging (rolling) was the key factor for mechanical properties; the cooling method influenced the intergranular corrosion of alloy NS1402, which could be met both by the method of water cooling and air cooling. To meet the technical requirement, the content of carbon must be lower than 0.035wt%; NS1402 alloy could pass through the intergranular corrosion test according to both ASTM A 262-02 C and ASTM G 28-02 A and the former was more suitable for examining the intergranular corrosion of the mentioned alloy.更多还原