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Forging method for eliminating crescent marks at the end of tc4 titanium alloy slab

A forging forming and titanium alloy technology, applied in metal processing equipment and other directions, 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 returning to the furnace and improving the yield.

Active Publication Date: 2021-11-19
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, the grinding is clean, and then it is put into the furnace at 700°C, heated to 800°C, kept for 120 minutes, and then raised to the phase transition point of 50°C, that is, 1050°C, kept for 400 minutes, and then out of the furnace for forging. Two upsetting, water cooling, the deformation of each upsetting is controlled at 37-40%, the final forgi...

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 forging forming method for eliminating the crescent mark at the end of the TC4 titanium alloy slab disclosed by the present invention firstly selects the TC4 ingot and carries out blanking; Widening and trimming; Grinding the processed billet clean, drawing and lengthening after heating, and trimming the edge again to complete forging. The forging forming method of the present invention can reduce the number of times of returning to the furnace, reduce the structure of the critical deformation zone, and can significantly eliminate the "crescent marks" that appear at the end of the TC4 titanium alloy slab during the forming process, ensure the flaw detection of the slab and the uniformity of the high and low structure, and eliminate the The large arc of the sharp corner of the billet improves the yield, shortens the machining time, and improves the production efficiency; and the forging forming method of the present invention can produce a unit weight of less than 4 tons, and the size is H (130-200) × W (800-1600) × L (1600~3000) TC4 alloy slab has 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 Patents(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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