GH4033 high-accuracy hexagonal steel sectional material composite forming method

Abstract

The invention discloses a GH4033 high-accuracy hexagonal steel sectional material composite forming method. A cold-rolling and cold-drawing composite forming process is mainly adopted to replace cold-draw forming in a traditional process. The process method mainly includes the steps of pretreatment, cold rolling, cold draw, solid solution treatment and the like, operation is simple, and the cost is low. According to a GH4033 hexagonal steel sectional material prepared through the method, the surface of the material is free of cracks, scratches and brittle failure, the surface smoothness is good, the dimensional accuracy reaches the 12th grade, the surface roughness reaches the degree of Ra<=0.8 [mu]m, the surface of the steel material is free of defects, and the using requirements of an aircraft can be met.

Description

technical field

[0001] The invention relates to a method for composite molding of high-temperature alloy steel profiles, in particular to a method for composite molding of GH4033 high-precision hexagonal steel profiles, and belongs to the technical field of metal preparation. Background technique

[0002] GH4033 cold-drawn hexagonal profile is used to manufacture fasteners for aero-engine tail nozzles, which is a key part of the system. Its high temperature strength and high temperature durability are required to be good; in order to meet the special needs of the special environment of the aircraft. Its market demand is relatively large. Domestic Fugang, Baote and other special steel enterprises can produce cold-drawn round profiles, but there is no domestic enterprise capable of producing cold-drawn hexagonal profiles. The main problems are: surface cracks, brittle fractures and The R dimension of the hexagonal corner is out of tolerance, etc. For this reason, some users ...

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