By using optical microscope

scanning electron microscope

transmission electron microscope

and confocal scanning microscope(LEXT)

the form and appearance of microstructure for 9%-12% Cr steel martensite heat-resisting steel have been analysed

results show that the LEXT has more higher distinguishabiity and amplification rate

it can be used to observe the three-dimensional state

form

and appearance at the surface of speciemens in submicrometer degree(0.2 mm)

and can be used to measure the microsize.The LEXT has remarkable advantages and application prospects in aspects of studying the ageing regularity of microstructure for high-temperature pressure-bearing parts made from 9%-12% Cr steel

and in metal superrision and examination etc..