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Forging forming method of eliminating crescent mark at end of TC4 titanium alloy slab

A forging and titanium alloy technology, applied in the direction of metal processing equipment, etc., can solve the problems of complex process and low yield, and achieve the effect of eliminating sharp corners and large arcs, reducing the number of times of returning to the furnace, and improving the yield of finished products

Active Publication Date: 2019-11-29
XIANYANG TIANCHENG TITANIUM IND
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to provide a forging forming method for eliminating crescent marks at the end of TC4 titanium alloy slab, which solves the problems of complicated process and low yield of existing forging methods

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0045] Target product: TC4 alloy slab, length × width × height: 150- +5 10 ×1400 0 +15 ×2500 0 +90 .

[0046] Step 1: Select the TC4 ingot with the ingot type of Φ800, put the ingot into the furnace at 700°C, raise the temperature to 800°C, keep it for 120 minutes, then raise it to 1150°C, and keep it for 480 minutes;

[0047] Out of the furnace for forging, two upsetting and two drawing are completed, air cooling, the deformation of each upsetting and drawing is controlled at 37-40%, the final forging temperature is 900°C; the heating and heat preservation coefficient is 0.3min / mm.

[0048] Step 2, after the treatment in step 1, grind it clean, then put it into the furnace at 700°C, raise the temperature to 800°C, keep it for 120 minutes, then raise it to the phase transition point of 50°C, that is, 1050°C, keep it for 400 minutes, take it out of the furnace for forging, and complete two Two upsetting, water cooling, the deformation of each upsetting is controlled at 37...

Embodiment 2

[0052] Target product: TC4 alloy slab, length × width × height: 130- +5 5 ×1800 0 +20 ×1600 0 +70 .

[0053] Step 1: Select TC4 ingot with an ingot type of Φ800, put the ingot into the furnace at 680°C, raise the temperature to 800°C, keep it for 135 minutes, then raise it to 1130°C, and keep it for 400 minutes;

[0054] Out of the furnace for forging, two upsetting and two drawing are completed, air cooling, the deformation of each upsetting and drawing is controlled at 37-40%, the final forging temperature is 900°C; the heating and heat preservation coefficient is 0.5min / mm.

[0055] Step 2, after the treatment in step 1, grind it clean, then put it into the furnace at 680°C, raise the temperature to 800°C, keep it for 150 minutes, then raise it to the phase transition point of 40°C, that is, 1040°C, keep it for 450 minutes, and then come out of the furnace for forging. Two upsetting, water cooling, the deformation of each upsetting is controlled at 37-40%, the final f...

Embodiment 3

[0059] Target product: TC4 alloy slab, length × width × height: 200 ++1 1 0 0 ×1600- +5 10 ×3000 0 +75 .

[0060] Step 1: Select TC4 ingot with an ingot type of Φ800, put the ingot into the furnace at 750°C, raise the temperature to 800°C, keep it for 150 minutes, then raise it to 1170°C, and keep it for 350 minutes;

[0061] Out of the furnace for forging, two upsetting and two drawing are completed, air cooling, the deformation of each upsetting and drawing is controlled at 37-40%, the final forging temperature is 950°C; the heating and heat preservation coefficient is 0.7min / mm.

[0062] Step 2, after the treatment in step 1, grind it clean, then put it into the furnace at 750°C, raise the temperature to 800°C, keep it for 130 minutes, then raise it to the phase transition point of 20°C, that is, 1020°C, keep it for 400 minutes, and then come out of the furnace for forging. Two upsetting, water cooling, the deformation of each upsetting is controlled at 37-40%, the ...

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Abstract

The invention discloses a forging forming method of eliminating crescent marks at the end of a TC4 titanium alloy slab. The forging forming method comprises the following steps that TC4 ingot is selected first and cogging is carried out; then the blank is ground clean and heated before forging; then the blank is ground clean and heated before widening and edge closing; the processed blank shall beground clean and heated the blank is widened and the edge is closed; after the treatment, the blank is ground clean, heated, and then the blank is drawn and then the edge is closed again, and the forging is completed. The forging forming method can reduce the time of furnace returns, reduce the structure of critical deformation area, significantly eliminate the "crescent marks" at the end of TC4titanium alloy slab during the forming process, ensure the slab flaw detection and high and low structure uniformity, eliminate the slab sharp angle large arc, improve the yield, shorten the machiningtime and improve the production efficiency; and the forging forming method can produce the production of TC4 alloy slab with unit weight less than 4 tons and dimension H (130-200) x w (800-1600) x L(1600-3000) and has a good application value.

Description

technical field [0001] The invention belongs to the technical field of forming methods for titanium alloy slabs, and in particular relates to a forging forming method for eliminating crescent marks at the ends of TC4 titanium alloy slabs. Background technique [0002] Due to the advantages of low density, high specific strength and corrosion resistance, titanium alloy slabs are widely used in ships, marine engineering, chemical industry, petroleum engineering and other fields. However, due to the limitation of raw material processing methods, the price of titanium alloy is relatively high. Therefore, in the field of manufacturing, improving the utilization rate of materials is the most effective way to reduce costs. [0003] In the field of titanium slab forging, in order to improve the utilization rate of materials, many forging workers try a variety of forging processes to improve the utilization rate of materials. The most mature application is tongueless forging, which i...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B21J1/06B21J5/08B21J5/00
CPCB21J1/06B21J5/002B21J5/08
Inventor 何军利王博张乐侯朝可
Owner XIANYANG TIANCHENG TITANIUM IND
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