Looking for breakthrough ideas for innovation challenges? Try Patsnap Eureka!

Preparation method of heavy-calibre nickel base alloy thin-walled tubular product

A technology of nickel-based alloy and thin-walled pipe, which is applied in the field of pipe processing to achieve the effects of increased material utilization, refined structure, and high added value of products

Inactive Publication Date: 2012-05-23
有研科技集团有限公司
View PDF9 Cites 37 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] A search of existing technical literature found that the method of preparing large-diameter nickel-based alloy (Hastelloy alloy) thin-walled pipes by centrifugal casting + spinning technology has been reported, involving the use of forged rod hot reverse extrusion + spinning technology to prepare large The report of nickel-based alloy thin-walled pipes has not yet been published, and the present invention is not limited by the specific gravity of alloying elements, and has a wide range of applications

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0029] The processing object is MonelK500 alloy, the diameter of the machined forged bar is Φ418mm, preheated to 180°C, sprayed with high-temperature anti-oxidation glass lubricant, then heated to 1100°C, kept for 2 hours, coated with glass lubricant powder; put it into the extrusion cylinder for Extrusion, the material of extrusion die, extrusion rod and extrusion cylinder is Inconel718 superalloy, the preheating temperature of extrusion die, extrusion cylinder and extrusion rod is 550 ° C, the lubricant of extrusion die and extrusion cylinder It is cylinder oil + graphite + molybdenum disulfide, the extrusion speed is 25mm / s, the extrusion ratio is 10.8, the outer diameter of the extruded pipe is Φ420mm, and the wall thickness is 10mm. After the extruded pipe is polished and pickled, a three-wheel powerful spinning machine is used for spinning and wall reduction. The thinning rate of the first pass is 20%, and the subsequent pass is 25%. The feeding ratio is 0.7mm / n, the fee...

Embodiment 2

[0031] The processing object is Monel500 alloy, the diameter of the machined forged bar is 298mm, preheated to 200°C and sprayed with high-temperature anti-oxidation glass lubricant, then heated to 1080°C, kept warm for 2 hours, and coated with glass lubricant powder; put it into the extrusion cylinder for Extrusion, the preheating temperature of the extrusion die, extrusion barrel, and extrusion rod is 550°C, the lubricant of the extrusion die and extrusion barrel is cylinder oil + graphite + molybdenum disulfide, and the extrusion speed is 45mm / s. The extrusion ratio is 9.6, the outer diameter of the extruded pipe is Φ300mm, and the wall thickness is 8mm. After the extruded pipe is polished and pickled, a three-wheel powerful spinning machine is used for spinning and wall reduction. The thinning rate of the first pass is 22%, and the thinning rate of the subsequent passes is 25-30%. The first two passes of the finished product The feed ratio of the first pass is 0.7mm / n, and...

Embodiment 3

[0033]The processing object is Inconel718 alloy, the diameter of the machined forged bar is 198mm, preheated to 260°C and sprayed with high-temperature anti-oxidation glass lubricant, then heated to 1200°C, kept for 2 hours, coated with glass lubricant powder; put into the extrusion cylinder for For extrusion, the preheating temperature of the extrusion die, extrusion barrel and extrusion rod is 550°C, the lubricant of the extrusion die and extrusion barrel is cylinder oil + graphite + molybdenum disulfide, and the extrusion speed is 40mm / s. The extrusion ratio is 3.6, the outer diameter of the extruded pipe is Φ200mm, and the wall thickness is 15mm. After the extruded pipe is polished and pickled, a three-wheel powerful spinning machine is used for spinning and wall reduction. The thinning rate of the first pass is 20%, and the subsequent pass is 25%. The feed ratio is 0.6mm / n, the feed ratio of other passes is 1.1mm / n, the deformation between solid solution is 65%, the solid...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

No PUM Login to View More

Abstract

The invention relates to a preparation method of a heavy-calibre nickel base alloy thin-walled tubular product, which comprises the steps of: 1, preparing a nickel base alloy tube blank by adopting a thermal backward extrusion process, wherein the extrusion temperature is 1000-1250 DEG C, the worker die preheating temperature is 450-550 DEG C, the extrusion speed is 25mm / s-60mm / s; 2, thinning through cold spinning with strong force, wherein the first pass of thinning rate is 20-75 percent, other passes of thinning rates are 25-30 percent, the deformation during thermal treatment (annealing or solution treatment) is 50-75 percent, the feeding ratio of two passes before a finished product is obtained is 0.5mm / n-0.7mm / n, and feeding ratios of other passes are 0.8mm / n-1.5mm / n; and 3, carrying out thermal treatment (annealing or solution treatment) on a semi-finished product or finished product, scouring and cleaning. The heavy-calibre nickel base alloy thin-walled tubular product processed by adopting the invention has the advantages of high material utilization rate, low cost and high additional value, is suitable for massive production, and has remarkable economic benefit and social benefit.

Description

technical field [0001] The invention relates to a method for preparing a large-diameter nickel-based alloy thin-walled pipe, belonging to the technical field of pipe processing. Background technique [0002] Nickel-based alloy pipes have good high-temperature corrosion resistance, oxidation resistance and excellent corrosion resistance. Large-diameter nickel-based alloy thin-walled pipes are mainly used in aviation, chemical, nuclear energy installations and other fields. The preparation of large-diameter nickel-based alloy thin-walled pipes is difficult. The traditional methods for producing large-diameter nickel-based alloy thin-walled pipes mainly include ①Nickel-based alloy forged rod + machining (drilling and turning). The utilization rate is extremely low and the waste is serious. ②Centrifugal casting + spinning process to prepare large-diameter nickel-based alloy thin-walled pipes. This method has been successfully used in Hastelloy series alloy large-diameter nickel-...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
IPC IPC(8): B21C37/06B21C23/02C22F1/10
Inventor 郭胜利李德富彭海健郭青苗杜鹏
Owner 有研科技集团有限公司
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Patsnap Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Patsnap Eureka Blog
Learn More
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic, Popular Technical Reports.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com