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Extrusion forming method of nickel alloy tube blank

A technology of extrusion molding and nickel alloy, which is applied in the field of extrusion molding of nickel alloy tube blanks, can solve the problems of high material strength, cold and hot mixed deformation, high scrap rate, etc., and achieve high material utilization rate, good structure and performance, and surface good quality effect

Inactive Publication Date: 2014-03-19
NORTHWEST INSTITUTE FOR NON-FERROUS METAL RESEARCH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] (1) The material has high strength and poor fluidity, so the forming of nickel-based superalloy tube billet is difficult and the scrap rate is high;
[0005] (2) Large deformation resistance
[0006] (3) Extrusion deformation temperature range is narrow
If the temperature is too low, the plasticity is low, the deformation resistance is large, and it is easy to produce cold and hot mixed deformation, resulting in uneven coarse grains

Method used

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  • Extrusion forming method of nickel alloy tube blank
  • Extrusion forming method of nickel alloy tube blank
  • Extrusion forming method of nickel alloy tube blank

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0032] Extrusion method of GH690 nickel alloy tube billet:

[0033] Step 1. Nickel alloy ingot heating and lubrication: heat the GH690 nickel alloy ingot with outer diameter D=116.3mm, inner diameter D=44.8mm, and height L=184mm to 1200°C, and then uniformly coat the inner and outer surfaces of the nickel alloy ingot Coated with glass powder lubricant;

[0034] Step 2, mold preheating and lubrication: preheat the extrusion cylinder, extrusion die and extrusion needle in the extruder to 350°C; in the specific implementation process, the extrusion cylinder, extrusion die and extrusion Heat the indenter to 150°C, spray lubricant, and then heat to 350°C; the extrusion die is a conical die, and its die angle α=60°;

[0035] Step 3, hot extrusion forming: first install the heated glass mat on the extrusion die, then install the nickel alloy ingot, graphite mat, and extrusion mat in the extrusion cylinder in turn, and then start extrusion, the extrusion speed is 40mm / s, extrusion r...

Embodiment 2

[0040] Extrusion method of GH690 nickel alloy tube billet:

[0041] Step 1. Heating and lubricating the nickel alloy ingot: heat the GH690 nickel alloy ingot with outer diameter D=116.2mm, inner diameter D=45mm, and height L=153mm to 1230°C, and then evenly coat the inner and outer surfaces of the nickel alloy ingot with Glass powder lubricant;

[0042] Step 2, mold preheating and lubrication: preheat the extrusion cylinder, extrusion die and extrusion needle in the extruder to 350°C; in the specific implementation process, the extrusion cylinder, extrusion die and extrusion Heat the indenter to 100°C, spray lubricant, and then heat to 350°C; the extrusion die is a conical die, and its die angle α=60°;

[0043] Step 3, hot extrusion forming: first install the heated glass mat on the extrusion die, then install the nickel alloy ingot, graphite mat, and extrusion mat in the extrusion cylinder in turn, and then start extrusion, the extrusion speed is 40mm / s, extrusion ratio is ...

Embodiment 3

[0048] Extrusion method of GH625 nickel alloy tube billet:

[0049] Step 1. Nickel alloy ingot heating and lubrication: heat the GH625 nickel alloy ingot with outer diameter D = 116.3mm, inner diameter D = 44.8mm, and height L = 142.2mm to 1150°C, and then heat the inner and outer surfaces of the nickel alloy ingot Uniform coating of glass powder lubricant;

[0050] Step 2. Die preheating and lubrication: Preheat the extrusion barrel, extrusion die and extrusion needle in the extruder to 360°C; in the specific implementation process, the extrusion barrel, extrusion die and extrusion After heating the indenter to 150°C, spray lubricant, and then heat to 360°C; the extrusion die is a conical die, and its die angle α=60°;

[0051] Step 3, hot extrusion forming: first install the heated glass pad on the top of the extrusion die, then install the nickel alloy ingot, graphite pad, and extrusion pad in the extrusion cylinder in turn, and then start extrusion, extrusion The speed is...

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Abstract

The invention provides an extrusion forming method of a nickel alloy tube blank. The method comprises the following steps: heating a nickel alloy ingot blank to a certain temperature; then selecting a proper extrusion mold, extrusion ratio and extrusion velocity and extruding the nickel alloy ingot blank; and finally, carrying out water quenching and cooling on the extruded nickel alloy ingot blank, thereby obtaining the nickel alloy tube blank. According to the invention, by selecting the proper extrusion mold and optimizing and improving the technology parameters of the ingot blank heating temperature, the extrusion velocity, the extrusion ratio and the like, various defects generated by a traditional extrusion technology can be improved obviously, and finally the high-quality tube blank which is good in surface quality, high in size precision and good in tissue performance is obtained.

Description

technical field [0001] The invention belongs to the technical field of nickel alloy material processing, and in particular relates to an extrusion molding method of a nickel alloy tube billet. Background technique [0002] Nickel-based superalloys have the advantages of anti-oxidation, corrosion resistance, and high service temperature. Superalloys are also widely used in aerospace, nuclear engineering, energy power, transportation, petrochemical and metallurgy and other fields. [0003] The unique alloy composition and microstructure of nickel-based superalloys determine that its extrusion forming process is different from other common materials. Compared with other types of materials, nickel-based superalloys have the following forming characteristics: [0004] (1) The material has high strength and poor fluidity, so the forming of nickel-based superalloy tube billet is difficult and the scrap rate is high; [0005] (2) High deformation resistance. Due to the complex co...

Claims

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Application Information

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IPC IPC(8): B21C23/02B21C25/02
Inventor 王彬于振涛牛金龙余森田宇兴麻西群程军
Owner NORTHWEST INSTITUTE FOR NON-FERROUS METAL RESEARCH