摘要
5Cr21Mn_9Ni_4WNb_2N耐热钢锻造后在1200℃以上加热时，NbC聚集成大块，在1200℃以下加热时，NbC薄膜（片）的析出倾向随加热温度降低而增大，1130℃及其以下加热时，粒状和细片状M_(23)C_6随加热温度降低而增多，而且NbC块可作为碳源退化成M_(23)C_6颗粒，过高或过低温度的锻造加热，因晶界NbC块过大或晶界NbC薄膜（片）过多而不利于锻造加工。
During heating above 1200℃ after forging,the NbC was gethered to form thelarge block between the grain boundaries in 5Cr21Mn9Ni4WNb2N heat resistant steel. Whlleheating below 1200℃, the prccipitating trend of grain boundary NbG films (lamellae) increasedas the temperature decreased,at 1300℃ or below,the M23C6 particles and small flacks increasedas the temperature decreased, furthermore, acting as the carbon source, the blocky NbC dege-nerated into particular M23C6. Therefore, too high or too low heating temperature was unfa-vour able for forging working.
出处
《上海金属》
CAS
1996年第3期15-19,共5页
Shanghai Metals
关键词
奥氏体
耐热钢
晶界
碳化物
Austenitic Heat Resistant Steel,Grain Boundary Carbide, Degeneration Reaction
