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GH4033 high-accuracy hexagonal steel sectional material composite forming method

A composite forming and hexagonal steel technology, which is used in the composite forming of GH4033 high-precision hexagonal steel profiles and high-temperature alloy steel profiles. High, low cost, the effect of improving the plasticity of the material

Active Publication Date: 2018-12-07
宝武特冶航研科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] In view of the above-mentioned deficiencies existing in the prior art, the object of the present invention is to provide a method for composite molding of GH4033 high-precision hexagonal steel profiles, so as to solve the existing GH4033 hexagonal profiles with surface cracks, brittle fractures, out-of-tolerance R dimensions at hexagonal corners, and cost High, long processing cycle and poor quality

Method used

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  • GH4033 high-accuracy hexagonal steel sectional material composite forming method
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  • GH4033 high-accuracy hexagonal steel sectional material composite forming method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0076] 1) Using ∮17mm as the billet, charge the billet in a single layer, place it evenly, raise the temperature in the empty furnace to 1050°C, and keep it warm for 0.5h. Put it on an M1083 coreless grinder for grinding to Ф17, remove surface defects, improve surface smoothness, and meet the requirements of cold-rolled billets: dimensional accuracy up to H10 level, surface roughness Ra≤0.8μm;

[0077] 2) The billet obtained in step 1) is subjected to preliminary rolling and finish rolling successively, and the preliminary rolling is carried out for 3 passes of rolling, and the hexagonal dimensions of the blank are checked after each pass, and the one with the largest opposite dimension is used as the next step. The deformation direction is pressed one by one, and the data tolerance zone is controlled within 0.03mm, the strain rate is 0.07-0.29 / s, the deformation amount of each pass is 0.02-0.05mm, and the blank is rolled to S15.15 through the initial rolling; The finish rolli...

Embodiment 2

[0081] 1) Using ∮14.8mm as the billet, charge the billet in a single layer, place it evenly, raise the temperature of the empty furnace to 1050°C, and keep it warm for 0.5h. The billet is placed on an M1083 coreless grinder for grinding and peeling to Ф14.8 to remove surface defects and improve the surface finish to meet the requirements of cold-rolled billets: the dimensional accuracy reaches H10 level, and the surface roughness Ra≤0.8μm;

[0082] 2) The billet obtained in step 1) is subjected to preliminary rolling and finish rolling successively, and the preliminary rolling is carried out for 3 passes of rolling, and the hexagonal dimensions of the blank are checked after each pass, and the one with the largest opposite dimension is used as the next step. The direction of deformation is pressed in one pass, and the data tolerance zone is controlled within 0.03mm, the strain rate is 0.07-0.29 / s, the deformation amount of each pass is 0.02-0.05mm, and the blank is rolled to S1...

Embodiment 3

[0086] 1) Using ∮14.8mm as the billet (without adding B, Ce and other trace elements), the billet is charged in a single layer and placed evenly. The empty furnace is heated to 1050°C and kept for 0.5h. After the heat preservation is completed, the billet is quickly taken out of the furnace and air cooled. After reaching room temperature and straightening, put the billet on an M1083 coreless grinder for grinding and peeling to Ф14.8 to remove surface defects and improve the surface finish to meet the requirements of cold-rolled billets: dimensional accuracy up to H10, surface roughness Ra≤0.8μm;

[0087] 2) The billet obtained in step 1) is subjected to preliminary rolling and finish rolling successively, and the preliminary rolling is carried out for 3 passes of rolling, and the hexagonal dimensions of the blank are checked after each pass, and the one with the largest opposite dimension is used as the next step. The direction of deformation is pressed in one pass, and the da...

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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 ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B21C37/00
CPCB21C37/00
Inventor 胡瑜黄元久任永平吴建军
Owner 宝武特冶航研科技有限公司
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