Production method of TC16 alloy disc round wire for cold heading

A technology of TC16 and alloy plate, which is applied in the field of titanium alloy processing, can solve the problems of low production efficiency, poor consistency and stability of structure performance, and poor process performance of fastener cold heading process, etc., and achieve the effect of stable performance and fine structure

Active Publication Date: 2017-06-16
西部超导材料科技股份有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The purpose of the present invention is to provide a preparation method of TC16 alloy coiled wire for cold heading, which solves the problem of low production efficiency, poor consistency and stability of structure and performance of TC16 alloy coiled wire for cold heading, and the problem of cold heading of fasteners. The problem of poor process performance

Method used

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  • Production method of TC16 alloy disc round wire for cold heading
  • Production method of TC16 alloy disc round wire for cold heading
  • Production method of TC16 alloy disc round wire for cold heading

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preparation example Construction

[0032] A kind of preparation method of TC16 alloy coil wire material for cold heading of the present invention, specifically comprises the following steps:

[0033] Step 1, blank processing:

[0034] Place the TC16 titanium alloy forging billet with uniform longitudinal and transverse structures in a resistance furnace, heat it at 50°C to 100°C above the phase transition point, hold it for 60min to 150min, and then roll it over multiple passes with one heat to obtain a certain structure The intermediate blank in the state; the rolling pass is 8 to 16 passes, the deformation of each pass is 10% to 25%, and the cumulative deformation of one fire is 87% to 97%.

[0035] Step 2, cold tandem rolling billet preparation:

[0036] Annealing the intermediate slab obtained in step 1 after heating and drawing, and then peeling off the skin with a centerless car to obtain a continuous cold rolling slab with good processing performance and surface condition;

[0037] The heating temperat...

Embodiment 1

[0045] Step 1: Use Φ47.5mm TC16 titanium alloy precise forging rods with uniform horizontal and vertical structures, place them in a box-type resistance furnace, heat at 80°C to 100°C above the phase transition point, and keep the temperature in the furnace for 120min to 150min. The rolling passes are 14 to 16 passes, and the deformation amount of each pass is 15% to 25%, and rolled to a coil drawing blank with a specification of Φ9.3mm.

[0046] Step 2: Heat the round billet rolled in step 1 in a tubular furnace at a temperature of 80°C to 90°C below the transformation point, and draw it to Φ9.0mm in 2 passes. After drawing, anneal at 720°C to 780°C, cool in the furnace to 550°C and then air cool, and use a centerless car to peel the skin to Φ8.0mm after annealing.

[0047] Step 3: Carry out continuous cold rolling of the Φ8.0mm billet obtained in step 2, match the mold according to the deformation amount of 10% to 15% in each pass, and roll it into a special-shaped wire with...

Embodiment 2

[0050] Step 1. Use a Φ30mm TC16 titanium alloy precision forged rod with uniform horizontal and vertical structures, place it in a box-type resistance furnace and heat it at 50°C to 65°C above the phase transition point. The holding time in the furnace is 60min to 90min, and the rolling pass 8 to 12 passes, each pass with a deformation of 10% to 25%, and rolled to a coiled drawing billet of Φ10.5mm.

[0051] Step 2, heat the coil obtained by rolling in step 1 in a tubular furnace, the heating temperature is 70°C to 80°C below the phase transition point, adopt 4 passes of hot drawing, and draw to Φ9.0mm, After drawing, anneal at 720°C to 780°C, cool in the furnace to 550°C and then air cool, and use a centerless car to peel the skin to Φ8.0mm after annealing.

[0052] Step 3: Carry out continuous cold rolling of the Φ8.0mm billet obtained in Step 2, match the mold according to the deformation amount of 8% to 11% in each pass, and roll it into a special-shaped wire with a 12-sid...

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Abstract

The invention discloses a production method of a TC16 alloy disc round wire for cold heading. The method comprises the following steps: heating a TC16 alloy precision forged blank with uniform transverse and vertical microstructure at a temperature which is a phase transition point or above, and carrying out one-heating and multi-pass rolling to form a drawn blank; heating the drawn blank at a temperature being the phase transition point or below, and carrying out multi-pass hot drawing to obtain a continuously cold-rolled wire blank; carrying out special pass cold continuous rolling on the continuously cold-rolled wire blank to obtain a special-shaped wire, and carrying out duplex roller die cold drawing on the special-shaped wire to form a round wire; and carrying out heat treatment and surface treatment on the round wire to obtain the TC16 alloy disc round wire with a bright surface. The TC16 alloy wire produced through adopting the method has the advantages of high consistence and stability in microstructure and performances, fine and uniform transverse microstructure after annealing, small and uniform vertically-drawn alpha phase, realization of the performances completely meeting corresponding material standard requirements, good consistence and stability in batches, passing processing verification of fasteners in batches and with multiple figure numbers, and excellent technologic performances of a continuous cold heading process.

Description

technical field [0001] The invention belongs to the technical field of titanium alloy processing, and in particular relates to a method for preparing a TC16 alloy coiled wire material for cold heading. Background technique [0002] TC16 alloy has the characteristics of medium strength in annealed state, good plasticity, good hardenability, and heat treatment strengthening. Continuous cold heading process can be used to manufacture bolts, rivets and other fasteners. After heat treatment strengthening, higher strength and good plasticity can be obtained. [0003] The traditional preparation method of TC16 alloy coiled wire is formed by hot rolling and hot drawing, and then heat treated to obtain the required structure and properties. The disadvantages of traditional technology are low processing and production efficiency, poor organization and performance stability, poor surface quality, and low yield. The wire prepared by the traditional process is prone to local cracking in...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22F1/18
CPCC22F1/183
Inventor 杨辉孙小平候峰起和永岗杜小联张鹏刘向宏冯勇张平祥
Owner 西部超导材料科技股份有限公司
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