Method for inspecting macrostructure defects of titanium alloy raw material

Abstract

The invention discloses a method for inspecting macrostructure defects of a titanium alloy raw material, which can be used for finding macrostructure unusual conditions of the titanium alloy raw material. With the adoption of the method, tissue genetic defects caused by unusual forging deformation of the titanium alloy raw material after blooming forging of a cast ingot can be detected. The method comprises the following steps: cutting out a macrostructure test piece with the thickness of 20mm+/-3mm from the titanium alloy raw material; preserving the heat in a heating furnace with the temperature lower than a beta conversion temperature by 30-40 DEG C for 60 minutes till the temperature is raised to be higher than the beta conversion temperature by 15-20 DEC by power; preserving the heat for 30 minutes with the furnace temperature uniformity within +/-5 DEG C and then cooling by air; then corroding and observing a macrostructure. The method is applicable to inspection of the macrostructures of alpha-type, alpha-beta-type and near beta-type titanium alloy raw materials; the macrostructure defects of the titanium alloy raw materials can be judged directly and clearly and economic losses caused by the fact that the titanium alloy raw materials with the macrostructure defects are utilized to produce a forging piece can be controlled.

Description

technical field [0001] The invention relates to a method for inspecting metal macrostructure defects, in particular to a method for inspecting low-magnification structure defects of titanium alloy raw materials. Background technique [0002] Due to its high specific strength and excellent corrosion resistance, titanium alloys have been widely used in the fields of civil aviation and military aviation. Titanium alloy raw materials of various materials are used to forge frames, beam-bearing structural parts and core engine disks for aircraft. It has accounted for 20-40% of the total weight of the aircraft. In ensuring the safety of aircraft, the inspection and control of the macrostructure quality of titanium alloy raw materials is a key factor. [0003] At present, GB / T5168 is used to test the high and low magnification structure of two-phase titanium alloy raw materials in China. The defects that can be detected are pores, cracks, inclusions, delamination, and coarse grain ...

AI Technical Summary

Problems solved by technology

[0006] In order to overcome the deficiency that the existing conventional low-magnification corrosion method inspection cannot find the abnormal macrostructure of titanium alloy raw materials, the technical problem to be solved by the present invention is to provide a method for detecting low-magnification structural defects of titanium alloy raw materials that can find abnormal macrostructures of titanium alloy raw materials. method

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