摘要:
The invention relates to a microstructure of an alloy for a tube for reformers, having an austenitic matrix structure, characterised in that: i) primary micrometric precipitates in the form of M 23 C 6 -type carbides, where M=Fe, Ni or Cr, and/or M(C,N)-type carbides, where M==Nb or Ti, are formed during the solidification of the alloy; ii) secondary nanometric precipitates in the form of M 23 C 6 -type carbides, where M=Fe, Ni or Cr, and/or M(C,N)-type carbides, where M==Nb or Ti, are formed during the activation of the tube; and iii) between 0.1 and 0.3% of Ni 16 Si7Nb 6 -type intermetallic precipitates is formed during the use of the tube.
摘要翻译:本发明涉及用于重整装置用管的合金的显微组织,其具有奥氏体基体结构,其特征在于:i)M23C6型碳化物形式的初级微米级沉淀物,其中M = Fe,Ni或Cr,和/ 或M(C,N)型碳化物,其中M == Nb或Ti在合金凝固过程中形成; ii)M23C6型碳化物(其中M = Fe,Ni或Cr)和/或M(C,N)型碳化物(其中M == Nb或Ti)在活化期间形成的二次纳米沉淀 管子; 和iii)在使用该管期间形成0.1%至0.3%的Ni 16 Si 7 Nb 6型金属间沉淀物。