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Wave-flat hot rolling and pulse current annealing combined method for titanium alloy plate

A pulse current, titanium alloy plate technology, applied in the direction of improving process efficiency, improving energy efficiency, etc., can solve the problems of high cost, high-strength titanium alloy toughness and plasticity can not meet the requirements of use, complex thermomechanical processing steps, etc. Achieving the effect of good strength, improved comprehensive mechanical properties and low cost

Pending Publication Date: 2022-07-08
TAIYUAN UNIV OF TECH
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] Aiming at the problems that the ductility and plasticity of high-strength titanium alloys prepared by the existing process cannot meet the requirements of use and the existing thermomechanical processing process steps are complicated and the cost is high, the present invention provides a method for wave flat hot rolling combined with pulse current annealing of titanium alloy plates

Method used

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  • Wave-flat hot rolling and pulse current annealing combined method for titanium alloy plate
  • Wave-flat hot rolling and pulse current annealing combined method for titanium alloy plate
  • Wave-flat hot rolling and pulse current annealing combined method for titanium alloy plate

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Embodiment 1

[0029] A kind of wave flat hot rolling combined pulse current annealing method of titanium alloy sheet

[0030] Titanium alloy is composed of element mass percentage: Al: 6.08%, V: 4.03%, Fe: 0.14%, Si: 0.013%, C: 0.018%, O: 0.11%, N: 0.0047%, H: 0.0008%, the alloy T β about 975°C. Titanium alloy sheet thickness 10mm, length 100mm, width 50mm.

[0031] Step 1: The titanium alloy plate was coated with glass flake anti-oxidation coating, and water quenched immediately after holding at 1100 °C for 1 h. The XRD and TEM analysis of the product showed that the quenched alloy was mainly composed of α′ hexagonal martensite.

[0032] Step 2: The heat-treated sample is rapidly heated to 800° C., and after being kept at this temperature for 30 minutes, the first pass of corrugated roll rolling is performed, and the reduction is 16%.

[0033] Step 3: The corrugated surface plate rolled in Step 1 is subjected to 4 passes of flat roll rolling, the heating temperature is 700° C., the hold...

Embodiment approach 1

[0036] Table 1 Embodiment 1 Mechanical Properties Values

[0037] state Tensile strength, MPa Elongation after break Example 1 1211 16％ original sheet 1053 8％

Embodiment 2

[0039] A kind of wave flat hot rolling combined pulse current annealing method of titanium alloy sheet

[0040] Titanium alloy is composed of element mass percentage: Al: 6.08%, V: 4.03%, Fe: 0.14%, Si: 0.013%, C: 0.018%, O: 0.11%, N: 0.0047%, H: 0.0008%, the alloy T β about 975°C. Titanium alloy sheet thickness 10mm, length 100mm, width 50mm.

[0041] Step 1: The titanium alloy plate was coated with glass flake anti-oxidation coating, and water quenched immediately after holding at 1100 °C for 1 h. The XRD and TEM analysis of the product showed that the quenched alloy was mainly composed of α′ hexagonal martensite.

[0042] Step 2: The heat-treated sample is rapidly heated to 800° C., and after being kept at this temperature for 30 minutes, the first pass of corrugated roll rolling is performed with a reduction of 15%.

[0043] Step 3: The corrugated surface plate rolled in step 1 is subjected to 4 passes of flat roll rolling, the heating temperature is 600° C., the holdin...

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Abstract

The invention discloses a wave-flat hot rolling and pulse current annealing combined method for a titanium alloy plate, belongs to the technical field of new materials, and aims to solve the problems that the plasticity and toughness of titanium alloy prepared by an existing process cannot meet the use requirements, and an existing thermal machining process is complex in step and high in cost. The invention provides a corrugated roller and flat roller rolling combined pulse current annealing method. The method comprises the following steps: rolling by a corrugated roller, applying a step load to a titanium alloy plate, obtaining an ultrafine grain and coarse grain mixed heterogeneous structure in the titanium alloy plate according to the difference of deformation at wave crests and wave troughs, annealing by pulse current, and promoting recovery recrystallization in the microstructure of the titanium alloy plate by utilizing the electric effect of the pulse current, so as to obtain the titanium alloy plate. Therefore, the titanium alloy plate with high strength and good plasticity and toughness is prepared. The prepared titanium alloy plate is a metal material with high strength and good plasticity.

Description

technical field [0001] The invention belongs to the technical field of new materials, and in particular relates to a method for wave flat hot rolling combined with pulse current annealing of a titanium alloy sheet. Background technique [0002] Titanium alloys have high specific strength and excellent corrosion resistance, and have a lower density, which is only about half that of steel and nickel-based superalloys. With these excellent properties, titanium alloys are widely used in industries such as aerospace, chemical industry, biomedicine, marine engineering and high-end sporting goods. In these special application fields, titanium alloys are required to have both high strength and good ductility and toughness. The conventional process for improving the strength of titanium alloys is to use the method of large plastic deformation to refine the structure of titanium alloys through thermal deformation, thereby improving the strength of the alloys. Due to the defects of l...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22F1/18C22F1/02C22F1/04C22F1/06C21D1/38C21D1/26C21D1/18C21D8/02C22C14/00C21D1/70C21D1/773
CPCC22F1/183C22F1/002C22F1/02C22F1/008C22F1/04C22F1/06C21D1/38C21D1/26C21D1/18C21D8/0247C21D8/0263C21D8/0273C21D8/0226C22C14/00C21D1/70C21D1/773Y02P10/25
Inventor 张志雄章俊涛张斯沫王涛韩建超贾燚张长江张树志
Owner TAIYUAN UNIV OF TECH
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