抄録
Nondestructive remaining life estimation system for Cr-Mo steel furnace tubes has been developed. The system is based on the relationship among microstructure, the types of carbides and creep rupture strength that obtained from the numerous creep rupture testing results of aged furnace tubes. Type of carbides and microstructure of aged Cr-Mo steel change by using the furnace tubes for a long period. Remaining life will be calculated by the creep rupture testing database of aged furnace tubes. The important feature of this technology is to identify the carbides which are extracted from the filed fine particles by using X-ray diffraction method. This system is applicable to2. 25Cr-1Mo low alloy steel tubes at present.
