Method for analyzing fracture of high-Cr steel or alloy cracked in high-temperature environment

According to the method for analyzing the fracture of the high-Cr steel or alloy cracked in the high-temperature environment, a crack tip of a crack-containing block is cut to obtain a crack tip metallographic specimen, the crack tip metallographic specimen is ground and polished, the crack form is visually observed, and corrosion product components of the crack tip metallographic specimen are analyzed; corroding the crack tip metallographic specimen by using an aggressive agent, and observing the relationship between the crack trend and the microstructure of the crack tip metallographic specimen by using a metallographic microscope to obtain a crack metallographic test result; opening residual cracks of the crack-containing block, visually observing macroscopic characteristics of the fracture, observing microscopic characteristics of different areas of the fracture by using a scanning electron microscope, and testing components to obtain micro-area components; corrosives on the surface of the fracture are re