内生氮化物弥散强化合金氮化前组织性能演变  

Evolution of microstructure and properties of internal nitride dispersion strengthened alloy before nitriding

作　　者：鞠泉[1,2] 张勇路 童金涛[1,2] 马惠萍[1] JU Quan;ZHANG Yong-lu;TONG Jin-tao;MA Hui-ping(High Temperature Materials Institute, Central Iron and Steel Research Institute, Beijing 100081, China;Beijing Key Laboratory of Advanced High Temperature Materials, Beijing 100081, China)

机构地区：[1]钢铁研究总院高温材料研究所,北京100081 [2]高温合金新材料北京市重点实验室,北京100081

出　　处：《钢铁研究学报》2018年第2期156-161,共6页Journal of Iron and Steel Research

摘　　要：内生氮化物弥散强化高温合金是一种新型的高性能燃烧室用高温合金,首先介绍了该合金的研制背景和进展。在此基础上,以典型的内生氮化物弥散强化合金NS163为目标合金,研究了该合金在氮化前热处理过程中组织性能演变。结果表明：合金在900～1 250℃温度范围内组织构成简单,为奥氏体基体＋MC碳化物。对实验条件下冷轧态板材的再结晶行为进行了系统研究,确定合金成品固溶温度以1 200℃为宜,在1 200℃固溶后基体平均晶粒度为5级,并表现出优异的冷加工性能和较低的高温抗拉强度。上述结果有助于优化氮化前NS163合金板材的组织状态,同时为合金内生氮化处理后的强化效果评估提供一个基点。Internal nitride dispersion strengthened superalloy is a new type of high performance superalloy for combustion chamber.The background and development of this alloy were firstly introduced.And then the microstructure and properties of NS163 which is a typical internal nitride dispersion strengthened alloy were investigated.The results show that the microstructure of NS163 is simple in the temperature range of 900-1 250℃ ,which is composed of austenite matrix and MC carbide.The recrystallization behavior of the cold-rolled sheet under the test condition was studied systematically.It is found that the solid solution temperature of the finished product should be 1 200℃ ,and after solid solution at 1 200℃ ,the sheet has 5 grade average grain size,excellent cold workability and low tensile strength at high temperature.The above results can help to optimize the microstructure of NS163 alloy sheet before nitriding and provide a basis for the evaluation of the strengthening effect of the alloy after internal nitriding.

关 键 词：再结晶 内生氮化物 高温合金 燃烧室 

分 类 号：TG132.3[一般工业技术—材料科学与工程]