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Spinning method of nickel base alloy bottom-carried cylindrical part

A technology of nickel-based alloys and processing methods, applied in metal processing equipment, forming tools, manufacturing tools, etc., can solve the problems of loss of continuity and integrity of metal fibers, reduction of material properties of cylindrical parts, and low stamping productivity, etc., to achieve Good plasticity, reduced material consumption, and improved productivity

Inactive Publication Date: 2017-11-03
CHANGCHUN UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In these two methods, the turning tool will cut off the metal grains during turning, and the metal fibers will lose continuity and integrity, which will reduce the material properties of the cylindrical parts.
The third method is stamping, but the stamping force required for stamping is relatively large. For the stamping of small bottomed cylindrical parts, the general mandrel can hardly bear the huge pressure and it is difficult to form. At the same time, the stamping productivity is also low. higher cost

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0022] Include the following steps:

[0023] (1) The material is GH4169 nickel-based alloy blank, with an outer diameter of Φ135 mm, a wall thickness of 14 mm, and a wall thickness difference of 0.1 mm;

[0024] (2) The mandrel is preheated to 400°C before spinning;

[0025] (3) The nickel-based alloy billet is heated to 700°C in a heating furnace for spinning and forming, using MoS2 lubricant, which is evenly applied to the mold and workpiece during spinning;

[0026] (4) Spinning forming is carried out on a spinning machine, and it is formed by a combination of general spinning and strong spinning. The specific parameters are as follows:

[0027] During the spinning process, oxygen-acetylene supplementary heating is used to ensure that the temperature of the nickel-based alloy blank is 700°C for spinning plastic forming, and the material is plastically formed in the α+β state. Feed rate f=50mm / min, wheel fillet radius r=15mm, wheel forming angle α=30°, withdrawal angle α=...

Embodiment 2

[0032] Include the following steps:

[0033] (1) The material is GH4169 nickel-based alloy blank, with an outer diameter of Φ140 mm, a wall thickness of 14.5 mm, and a wall thickness difference of 0.15 mm;

[0034] (2) The mandrel is preheated to 500°C before spinning;

[0035] (3) The nickel-based alloy sheet is rotated on the mandrel and heated to 850°C for spinning and forming. Glass lubricant is used and evenly applied to the blank before spinning;

[0036] (4) Spinning forming is carried out on a spinning machine, and it is formed by a combination of general spinning and strong spinning. The specific parameters are as follows:

[0037] During the spinning process, oxygen-acetylene supplementary heating is used to ensure that the temperature of the nickel-based alloy blank is 850°C for spinning plastic forming, and the material is plastically formed in the α+β state. The spindle speed is n=250r / min, and the spinning wheel is longitudinal Feed rate f=140mm / min, wheel fil...

Embodiment 3

[0042] Include the following steps:

[0043] (1) The material is GH4169 nickel-based alloy blank, with an outer diameter of Φ145 mm, a wall thickness of 15 mm, and a wall thickness difference of 0.2 mm;

[0044] (2) The mandrel is preheated to 600°C before spinning;

[0045] (3) The nickel-based alloy sheet is rotated on the mandrel and heated to 985°C for spinning and forming. Glass lubricant is used and evenly applied to the blank before spinning;

[0046] (4) Spinning forming is carried out on a spinning machine, and it is formed by a combination of general spinning and strong spinning. The specific parameters are as follows:

[0047] During the spinning process, oxygen-acetylene supplementary heating is used to ensure that the temperature of the nickel-based alloy blank is 985°C for spinning plastic forming, and the material is plastically formed in the α+β state. Feed rate f=150mm / min, wheel fillet radius r=30mm, wheel forming angle α=30°, withdrawal angle α=10°. Use ...

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Abstract

The invention relates to a spinning method of a GH4169 nickel base alloy bottom-carried cylindrical part. The spinning method comprises the following steps: (1) a GH4169 nickel base alloy blank is prepared; (2) a core mold is preheated before spinning; (3) a nickel base alloy plate is heated in a heating furnace or directly heated on the core mold for spinning formation; and a lubricating agent is uniformly coated during spinning; (4) the spinning formation is performed on a spinning machine; (5) the spinning final formation is performed; after final formation, the annealing is performed in a vacuum furnace; and the furnace cooling or the air cooling is performed; and (6) a spun part is machined. The invention finds out a hot spinning process aiming at the GH4169 nickel base alloy bottom-carried cylindrical part; the material waste problem in the production process of the nickel base alloy bottom-carried cylindrical part can be reduced; and huge economic benefit and social benefit are achieved.

Description

technical field [0001] The invention relates to a processing method of a nickel-based alloy belt-bottomed rotary part, in particular to a spinning forming processing method of a high-temperature alloy (GH4169) belt-bottomed rotary part. Background technique [0002] There are usually three ways to obtain a cylindrical part with a bottom. The first method is to bend the plate into a circle first, then weld it, and finally use a lathe to perform secondary processing on the workpiece. However, this method is easy to open the weld at the weld, and is prone to welding defects such as blisters and bubbles. The second method is to use a lathe to turn the bar stock. In these two methods, the turning tool will cut off the metal grains during turning, and the metal fibers will lose continuity and integrity, so that the material properties of the cylindrical parts will be reduced. The third method is stamping, but the stamping force required for stamping and forming is relatively la...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B21D22/14B21D37/16
CPCB21D22/14B21D37/16
Inventor 梁嵬徐凯曹振鹏查仲民姜海英庞海强青格勒赵玉娟陈家强徐杰王文东
Owner CHANGCHUN UNIV OF SCI & TECH
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