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Forging method for ultra-large titanium alloy whole frame forged piece

A titanium alloy and ultra-large technology, applied in the field of forging, can solve the problems that the uniformity of mechanical properties of forgings cannot meet the design requirements, the quality of metallurgy cannot be guaranteed, and the difficulty of smelting raw materials, etc., to achieve good uniformity of mechanical properties , processing deformation is small, the effect of improving safety and reliability

Active Publication Date: 2016-01-06
XIAN TRIANGLE AVIATION TECH +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] In the prior art, large-scale titanium alloy load-bearing frames are generally manufactured by direct machining of free forgings. The forgings produced in this way have the disadvantages of heavy blanking, difficulty in smelting raw materials, and unguaranteed metallurgical quality. A series of problems such as performance uniformity not meeting design requirements
However, if the super-large titanium alloy load-bearing frame with a weight of more than 500Kg and an outer dimension of more than 2000mm is directly processed by free forging, the blanking specification is huge, which exceeds the limit of the existing raw material melting specifications. Manufactured by the "segment machining + welding combination" method, using this welding combination method also faces many technical problems such as weight, life and safety.

Method used

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  • Forging method for ultra-large titanium alloy whole frame forged piece
  • Forging method for ultra-large titanium alloy whole frame forged piece
  • Forging method for ultra-large titanium alloy whole frame forged piece

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0043] Example 1: forging material: TC4-DT; phase transition point: 985°C; forging outline size: 3700×1830×207mm; forging projected area 5.4m2; forging weight: 1100Kg; The corners corresponding to the blanks are useless materials.

[0044] 1. Blank making

[0045] Step 1, according to the shape and size requirements of the forging, the initial blank is prepared by a local upsetting method.

[0046] The size of the blank for this forging is 2400×1200×160mm. One side of the forging in the width direction is missing a corner, and the corner of the corresponding blank is useless. Therefore, it is necessary to locally upset the corner of the corresponding blank to obtain the initial blank. The specific method is: place the billet in the effective area of ​​a Class III electric furnace for heating, the heating temperature is 950±10°C, and the holding time is 130min; the preheating temperature of the tooling and upper and lower anvils is 100-350°C; the billet is placed on the free f...

Embodiment 2

[0060] Example 2: forging material: TC4-DT; phase transition point: 982°C; forging outline size: 3705×1784×150mm; forging projected area 5.2m 2 ;Forging weight: 980Kg; One side of the forging in the width direction is missing corners, and the corners corresponding to the blanks are useless materials.

[0061] 1. Blank making

[0062] Step 1, according to the shape and size requirements of the forging, the initial blank is prepared by machining.

[0063] The size of the blank for this forging is 2600×1350×130mm. Due to the thin thickness of the slab, it is more appropriate to remove the excess corner material directly by machining. The length of the two right-angled sides of the removed triangular blank is 300mm.

[0064] Step 2: Place the initial billet in the effective area of ​​a Class III electric furnace for heating, the heating temperature is 947±10°C, and the holding time is 80 minutes; the preheating temperature of the tooling and upper and lower anvils is 100-350°C; ...

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Abstract

The invention belongs to the technical field of forging, and relates to a forging method for an ultra-large titanium alloy whole frame forged piece. The forging method includes the following steps that firstly, blank manufacturing is performed, wherein an initial blank is prepared through a local upsetting method or a machining method; the prepared initial blank is longitudinally drawn long on a free forging and pressing machine; the free forging and pressing machine presses down a material opening plate which reciprocates so that the blank can be transversely drawn long; the blank is placed on a die forging and pressing machine to be subjected to loose tooling forging, and the outer contour of the blank reaches the outer contour size of the forged piece; and wad piercing burr, corresponding to an inner hole of the forged piece, of the blank is cut and removed; and secondly, die forging is performed, wherein positioning forging is performed; pre-forging is performed; and final forging is performed. According to the forging method for the ultra-large titanium alloy whole frame forged piece, production of the ultra-large whole frame forged piece is achieved through the method, and the forging method has the beneficial effects of being simple in technology, good in economical efficiency, good in mechanical performance of the forged piece and the like.

Description

technical field [0001] The invention belongs to the technical field of forging, and in particular relates to a forging method of a super-large titanium alloy integral frame forging. Background technique [0002] Large titanium alloy forgings generally refer to forgings with a weight of more than 50Kg and an outer dimension of more than 500mm. With the increase of aircraft size and the integration of structural design, super-large forgings with a weight of more than 500Kg and an outer dimension of more than 2000mm have appeared. [0003] In the prior art, large-scale titanium alloy load-bearing frames are generally manufactured by direct machining of free forgings. The forgings produced in this way have the disadvantages of heavy blanking, difficulty in smelting raw materials, and unguaranteed metallurgical quality. Performance uniformity can not meet the design requirements and a series of problems. However, if the super-large titanium alloy load-bearing frame with a weigh...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B21J5/02
Inventor 王海鹏费跃朱敏玲王新南陈恩亭尚国强朱知寿刘广义刘保亮
Owner XIAN TRIANGLE AVIATION TECH
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