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Cold rolling method of TC4 titanium alloy wires

A titanium alloy wire and annealing technology, which is applied in the direction of metal rolling, heat treatment equipment, furnaces, etc., can solve the problems of decreased elongation, small cold drawing deformation, elongation after breaking, and reduced area shrinkage yield strength. Achieve the effect of production effect and product quality stability improvement, good consistency of mechanical properties and dimensional accuracy, performance and stability satisfaction

Pending Publication Date: 2020-04-10
宝鸡鑫诺特材股份有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The amount of deformation in cold drawing is small (about 8%-20%), the number of cold drawing passes is large, the production cost is high, and the efficiency is low
[0006] After cold drawing of TC4 titanium alloy wire, the strength increases and elongation decreases, and obvious work hardening effect occurs. After multi-mode cold drawing of TC4 titanium alloy wire, the elongation after fracture and the shrinkage of the section Rate (plasticity index) and yield strength drop seriously, or even fail to meet the standard

Method used

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  • Cold rolling method of TC4 titanium alloy wires
  • Cold rolling method of TC4 titanium alloy wires
  • Cold rolling method of TC4 titanium alloy wires

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0038] Example 1: Preparation of Φ3.0mm TC4 titanium alloy wire by cold rolling

[0039] Billet grade: TC4, state: coil wire, specification: Φ9.8mm. The cold rolling adopts a 4-station tandem continuous cold rolling mill, and the rolling pass adopts a round-polygonal-round structural design.

[0040] Pickling, repairing, and thoroughly grinding the cracks and sticky pits on the surface of the billet.

[0041] Atmospheric furnace annealing, holding at 780°C for 60min.

[0042] In the first pass of cold rolling, the deformation rate is 24.6%.

[0043] In the second pass of cold rolling, the deformation rate is 18.6%; annealed in an atmospheric furnace, and kept at 750°C for 60 minutes; inspect for defects.

[0044] In the third pass of cold rolling, the deformation rate is 20.1%.

[0045] The fourth pass is cold rolling, with a deformation rate of 17.7%; annealing in an atmospheric furnace, holding at 730°C for 45 minutes; checking for defects.

[0046] The fifth pass is co...

Embodiment 2

[0069] Embodiment 2: Preparation of Φ4.0mmTC4 titanium alloy wire by cold rolling

[0070] Billet grade: TC4, state: coiled wire, specification: Φ9.8mm; cold rolling adopts 4-station tandem continuous cold rolling mill, and the rolling pass adopts a round-polygonal-round structural design.

[0071] Pickling, repairing, and thoroughly grinding the cracks and sticky pits on the surface of the billet.

[0072] Atmospheric furnace annealing, holding at 780°C for 60min.

[0073] In the first pass of cold rolling, the deformation rate is 25.0%.

[0074] The second pass is cold rolling, with a deformation rate of 17.9%; annealing in an atmospheric furnace, holding at 750°C for 60 minutes; checking for defects.

[0075] In the third pass of cold rolling, the deformation rate is 21.1%.

[0076] The fourth pass of cold rolling has a deformation rate of 17.1%. Atmospheric furnace annealing, heat preservation at 730°C for 45 minutes; check for defects.

[0077] The fifth pass is cold...

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Abstract

The invention provides a cold rolling method of TC4 titanium alloy wires. By reasonably distributing the cold rolling deformation amount of each pass and using the mode of small deformation accumulative large deformation, continuous cold rolling of the TC4 titanium alloy wires is realized, the rolling precision is high, the speed is high, and the method is suitable for continuous machining of thecoiled wires large in piece weight (>=30 kilograms per coil). Proper heat treatment is used in the cold rolling process, so that on the basis of ensuring the machining performance of the wires, the metallographic structure and mechanical property of the material are well matched. The machining process is stable, the mechanical property and size precision consistency of the produced wires are good,the production effect and the product quality stability are greatly improved compared with a traditional cold drawing technology, and the product precision, performance and stability completely meetcustomer requirements; and multiple times of heat treatment and graphite emulsion lubricant coating are not needed in the early stage of wire rolling, and harmful gas is prevented from being absorbedby the wires. The method is low in cost and simple in process, and can realize large-scale industrial production.

Description

technical field [0001] The invention belongs to the technical field of titanium alloy material processing, and in particular relates to a cold rolling method for TC4 titanium alloy wire. Background technique [0002] Titanium alloy has the characteristics of good corrosion resistance, specific strength, non-magnetism and high and low temperature performance, and has become an eye-catching high-performance new material. It has been very active in military and civilian applications since the 1950s. [0003] In the processing of TC4 titanium alloy wire, the commonly used processing technology is cold drawing (drawing at room temperature). Titanium alloy has high strength and low plasticity at room temperature. Most of the processing process is made into semi-finished products after heating. Ferroalloy The processing of rods and wires generally adopts the method of rolling first and then drawing. The larger the cross-section of the alloy, the higher the content of alloying eleme...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B21B1/16C21D9/52
CPCB21B1/16C21D9/525
Inventor 辛昱江董军利崔俊
Owner 宝鸡鑫诺特材股份有限公司
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