Upsetting and extruding precision die-forging forming method for large titanium alloy deep tube parts

A precision die forging and forming method technology, which is applied in the field of upsetting and extrusion precision die forging of large titanium alloy deep tube parts, can solve the problems of poor process stability, low material utilization rate, unsatisfactory and other problems, so as to improve unsatisfactory structure, The effect of reducing raw material consumption and reducing the difficulty of mold release

A precision die forging and forming method technology, which is applied in the field of upsetting and extrusion precision die forging of large titanium alloy deep tube parts, can solve the problems of poor process stability, low material utilization rate, unsatisfactory and other problems, so as to improve unsatisfactory structure, The effect of reducing raw material consumption and reducing the difficulty of mold release

CN101693279AActive Publication Date: 2010-04-14XIAN SUPERCRYSYAL SCI TECH DEV CO LTD
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  • Upsetting and extruding precision die-forging forming method for large titanium alloy deep tube parts
  • Upsetting and extruding precision die-forging forming method for large titanium alloy deep tube parts
  • Upsetting and extruding precision die-forging forming method for large titanium alloy deep tube parts

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0031] 1) Mold design: the mold is designed as a cylinder with a draft angle of 1°;

[0032] 2) Selection of blank size: the blank size is 230×320, the outer diameter of the blank is 80% of the outer diameter of the cylinder, and the height of the blank is 120% of the height of the outer cylinder;

[0033] 3) Spraying a protective lubricating layer with a thickness of 3mm on the blank; the protective lubricating layer is sprayed from a mixture of 15% glass frit, 40% M60 resin and 45% water.

[0034] 4) The blank is heated in an electric furnace, the temperature is 50°C below the liquidus point (phase transition point α+β / β), and the heating coefficient is 1.0min / mm; at the same time, the mold is preheated, the preheating temperature is 200°C, and the preheating time is 24h ;

[0035] 5) Install the mold on the 400KJ counter-hammer, put the heated billet into the cavity of the mold and forge for 1 fire;

[0036] 6) Grinding the cracks and folding defects of the blank until th...

Embodiment 2

[0046] 1) Mold design: the mold is designed as a cylinder with a draft angle of 2°;

[0047] 2) Selection of blank size: the blank size is φ280×260, the outer diameter of the blank is 98% of the outer diameter of the cylinder, and the height of the blank is 120% of the height of the outer cylinder;

[0048] 3) Spraying a protective lubricating layer with a thickness of 0.2mm on the blank; the protective lubricating layer is sprayed from a mixture of 25% by mass of glass powder, 40% of M60 resin and 35% of water.

[0049] 4) The blank is heated in an electric furnace at a temperature of 40°C at the liquidus point (phase transition point α+β / β), and the heating coefficient is 0.8min / mm; at the same time, the mold is preheated at a temperature of 300°C and a preheating time of 12 hours;

[0050] 5) Install the mold on the 25t die hammer, put the heated billet into the mold cavity and forge for 1 fire;

[0051] 6) Grinding the cracks and folding defects of the blank until there a...

Embodiment 3

[0061] 1) Mold design: the mold is designed as a cylinder with a draft angle of 1°;

[0062] 2) Selection of blank size: the blank size is φ230×320, the outer diameter of the blank is 80% of the outer diameter of the cylinder, and the height of the blank is 120% of the height of the outer cylinder;

[0063] 3) A protective lubricating layer with a thickness of 1.5 mm is sprayed on the blank; the protective lubricating layer is sprayed from a mixture of 35% glass frit, 40% M60 resin and 25% water.

[0064] 4) The blank is heated in an electric furnace at a temperature of 30°C below the liquidus point (phase transition point α+β / β), and the heating coefficient is 0.9min / mm; at the same time, the mold is preheated at a temperature of 400°C and a preheating time of 6h;

[0065] 5) Install the mold on the 400KJ counter-hammer, put the heated billet into the cavity of the mold and forge for 1 fire;

[0066] 6) Grinding the cracks and folding defects of the blank until there are no ...

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Abstract

The invention discloses an upsetting and extruding precision die-forging forming method for large titanium alloy deep tube parts. The method includes that: firstly, enabling draft of a tube body die to range from 1 degree to 3 degrees, enabling the outer diameter of a blank to be 50% to 98% of that of a die tube body, enabling the height of the blank to be 60% to 150% of that of the tube body; spraying a protective lubricating layer with thickness ranging from 0.2mm to 3mm on the blank; heating the blank in an electric furnace under 5 DEG C to 50 DEG C of the temperature phase-transition point (alpha +beta / beta), enabling the heating coefficient to be larger than or equal to 0.6 min / mm, simultaneously preheating the die for 6h to 24h at a temperature ranging from 200 DEG C to 450 DEG C; finally, installing the die on a pressure machine, a die forging hammer or a counter-blow hammer, and forging the diathermal blank inside a die cavity. The upsetting and extruding precision die-forging forming method for producing the large titanium alloy deep tube parts is simple in procedure operation, stable and reliable in performance, and is easy to control quantity and to realize large-batch industrialized production of products.

Description

technical field [0001] The invention belongs to the field of thermal processing and forming of metal materials, and relates to a forming method of a titanium alloy deep cylinder, in particular to an upsetting and extrusion precision die forging forming method of a large titanium alloy deep cylinder. Background technique [0002] The so-called large titanium alloy deep cylinder refers to a cylinder with an inner diameter (d) greater than 160mm, an outer diameter (D) greater than 200mm, a height (H) greater than 200mm, and H / D≥1, h(h1+h2) / d≥1 type rotary components, the main product shape see Figure 1-1 to Figure 1-4 . [0003] Large titanium alloy deep tube parts are widely used in aviation, aerospace, navigation, chemical industry and other fields, but because titanium alloy is a rare and difficult-to-machine metal material, the forming problem of large titanium alloy deep tube parts is currently faced by many manufacturers A major technical problem. There are currently t...

Claims

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Application Information

Patent Timeline
14 Apr 2010
Publication
CN101693279A
IPC
B21J5/02
Inventors
张利军; 田军强