热力发电
熱力髮電
열력발전
THERMAL POWER GENERATION
2014年
8期
29-36
,共8页
聂铭%张健%黄丰%欧阳柳章
聶銘%張健%黃豐%歐暘柳章
섭명%장건%황봉%구양류장
T/P92 钢%微观组织%转变%力学性能%高温%时效%蠕变
T/P92 鋼%微觀組織%轉變%力學性能%高溫%時效%蠕變
T/P92 강%미관조직%전변%역학성능%고온%시효%연변
T/P92 steel%transformation%mechanical properties%microstructure%high temperature%aging%creep
T/P92钢已成为超超临界火电机组用关键材料，被用于主蒸汽管道及再热器等。论述了T/P92钢在高温时效和蠕变过程中微观组织转变和力学性能的变化规律，重点总结了不同碳化物的析出顺序、尺寸和形态变化，并介绍了其微观结构与力学性能的内在联系。从析出相的演变规律、板条马氏体结构的退化及合金元素的转移等方面阐述了 T/P92钢蠕变强度降低和材料过早失效的原因以及T/P92钢寿命预测方法的研究趋势。
T/P92鋼已成為超超臨界火電機組用關鍵材料，被用于主蒸汽管道及再熱器等。論述瞭T/P92鋼在高溫時效和蠕變過程中微觀組織轉變和力學性能的變化規律，重點總結瞭不同碳化物的析齣順序、呎吋和形態變化，併介紹瞭其微觀結構與力學性能的內在聯繫。從析齣相的縯變規律、闆條馬氏體結構的退化及閤金元素的轉移等方麵闡述瞭 T/P92鋼蠕變彊度降低和材料過早失效的原因以及T/P92鋼壽命預測方法的研究趨勢。
T/P92강이성위초초림계화전궤조용관건재료，피용우주증기관도급재열기등。논술료T/P92강재고온시효화연변과정중미관조직전변화역학성능적변화규률，중점총결료불동탄화물적석출순서、척촌화형태변화，병개소료기미관결구여역학성능적내재련계。종석출상적연변규률、판조마씨체결구적퇴화급합금원소적전이등방면천술료 T/P92강연변강도강저화재료과조실효적원인이급T/P92강수명예측방법적연구추세。
This paper reviews the laws in microstructure transformation and the mechanical properties changing for T/P92 steel during the aging and creep exposure process at high temperature.The precipitati-on sequences of various carbides and their variations in size and morphology are discussed in detail,as well as the inner link between the microstructure and the mechanical properties.Besides,the reasons for decline in creep strength and premature failure for T/P92 are discussed in terms of precipitations evolution,lath martensite degradation,alloying elements diffusion and so on.Finally,the methods for creep life prediction are reviewd and forecast.
