Method for manufacturing high-accuracy pure titanium rod

A high-precision, pure titanium technology, applied in the field of material processing, can solve the problems of low recovery value, deep bar indentation, labor and time-consuming, etc., and achieve the effects of small metallographic structure, low heating temperature, and increased mechanical strength

Inactive Publication Date: 2015-04-08
QINGDAO MATE RUIOU NEW MATERIAL TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] The existing method of preparing medical titanium alloy rods generally adopts the stress-relief straightening method during finishing treatment. When turning before finishing treatment, the bar needs to leave a minimum margin of 30-40 wires, and this method The temperature of the bar is high when heating. Generally, the pure titanium bar needs to be heated to 550-600°C, and the titanium alloy bar needs to be heated to 650-700°C. The whole becomes soft, and the overall indentation of the bar during straightening is deep, and the minimum value will reach 10 wires. These unfavorable factors cannot be eliminated by polishing alone, so these unfavorable factors must be eliminated by grinding, and the roughness of grinding can reach 6.4 um, it must be polished twice to meet the requirements of the finished bar, and the grinding process is labor-intensive and time-consuming, and the abrasive debris generated is mixed with sand particles, and the recovery value is low, so it is necessary to improve

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] First, select a pure titanium billet with a diameter of 360mm and a length of 1.7m, and cut off the part that is found to be defective after ultrasonic flaw detection; secondly, put the pure titanium billet into a resistance furnace and heat it to 980°C, keep it at a constant temperature for 3 hours, and select a hydraulic press , pneumatic hammer or electro-hydraulic hammer, so that the deformation rate of pure titanium billet reaches 55%, the pure titanium billet is forged into a pure titanium billet with a square mouth of 190mm, and the surface defects such as burrs and cracks are removed by grinding, and then according to the finished product The required weight / specification of the bar is to cut the pure titanium ingot into a small pure titanium ingot. The fourth step is to put the small pure titanium ingot into a resistance furnace and heat it to 950°C, keep it warm for 3 hours, choose a hydraulic press, air hammer or One of the electro-hydraulic hammers makes the ...

Embodiment 2

[0027] First, select a pure titanium billet with a diameter of 360mm and a length of 1.7m, and cut off the part that is found to be defective after ultrasonic flaw detection; secondly, put the pure titanium billet into a resistance furnace and heat it to 1050°C, keep it at a constant temperature for 5 hours, and choose a hydraulic press , air hammer or electro-hydraulic hammer, so that the deformation rate of pure titanium billet reaches 60%, the pure titanium billet is forged into a pure titanium billet with a square mouth of 190mm, and the surface defects such as burrs and cracks are removed by grinding, and then according to the finished product The required weight / specification of the bar is to cut the pure titanium ingot into a small pure titanium ingot. In the fourth step, put the small pure titanium ingot into a resistance furnace and heat it to 880°C, keep it warm for 5 hours, choose a hydraulic press, air hammer or One of the electro-hydraulic hammers makes the deforma...

Embodiment 3

[0029] First, select a pure titanium billet with a diameter of 360mm and a length of 1.7m, and cut off the part that has defects after ultrasonic flaw detection; secondly, put the pure titanium billet into a resistance furnace and heat it to 1000°C, keep it at a constant temperature for 5 hours, and choose a hydraulic press , air hammer or electro-hydraulic hammer, so that the deformation rate of pure titanium billet reaches 58%. The pure titanium billet is forged into a pure titanium billet with a square opening of 190mm, and the surface defects such as burrs and cracks are removed by grinding, and then according to the finished product The required weight / specification of the bar is to cut the pure titanium ingot into a small pure titanium ingot. The fourth step is to put the small pure titanium ingot into a resistance furnace and heat it to 900°C, keep it warm for 5 hours, choose hydraulic press, air hammer or One of the electro-hydraulic hammers makes the deformation rate o...

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PUM

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Abstract

The invention discloses a method for manufacturing a high-accuracy pure titanium rod. The method includes the steps of blank preparation, blanking, cogging-down forging, deformation processing, annealing, thermal straightening, lathe machining, piece finishing and finished product packaging inspection. During lathe machining of a rod, diameter of the rod can be directly machined to be in the size of a finished product rod, and waste chips generated during turning of the rod can be recycled, so that economic value is increased; heating temperature is low during finishing, so that influence on metallographic structure of the rod is small, service life of the rod is prolonged, and mechanical strength of the rod is improved; due to low heating temperature, oxidation scale on the surface of the rod is extremely thin, total indentation of the rod is small during straightening, grinding is not needed after straightening, and requirements, on coarseness of 1.6 micrometers and size tolerance, of the finished product rod can be met by directly polishing for two times.

Description

technical field [0001] The invention relates to the field of material processing, in particular to a method for preparing high-precision pure titanium rods. technical background [0002] The existing method of preparing medical titanium alloy rods generally adopts the stress-relief straightening method during finishing treatment. When turning before finishing treatment, the bar needs to leave a minimum margin of 30-40 wires, and this method The temperature of the bar is high when heating. Generally, the pure titanium bar needs to be heated to 550-600°C, and the titanium alloy bar needs to be heated to 650-700°C. The whole becomes soft, and the overall indentation of the bar during straightening is deep, and the minimum value will reach 10 wires. These unfavorable factors cannot be eliminated by polishing alone, so these unfavorable factors must be eliminated by grinding, and the roughness of grinding can reach 6.4 um, it must be polished twice to meet the requirements of th...

Claims

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Application Information

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IPC IPC(8): B23P15/00
CPCB21C37/04B23P15/00
Inventor 岑伟郭雷
Owner QINGDAO MATE RUIOU NEW MATERIAL TECH CO LTD
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