A kind of preparation method of metal composite pipe blank with more than two layers

A technology for metal composite pipes and composite pipes, which is applied in the field of preparation of more than two layers of metal composite pipe blanks and metal tube blanks, and can solve the problems of increasing the cost of lost foam and sand mold production, poor toughness of the interface area, and increased process costs, etc. , to achieve the effects of clear composite interface, improved interfacial bonding strength, and improved composite quality

Active Publication Date: 2017-12-05
安徽巨鼎高分子科技股份有限公司
View PDF18 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although the nesting billet making process is simple, there is a large gap between the inner and outer tube billets, and subsequent large-deformation pressure processing is required to obtain high-quality composite pipes; although the centrifugal casting billet making process can obtain higher interface bonding strength , but it is easy to form a mixed melting zone of the two metals at the interface, thus forming an interface compound, resulting in poor toughness of the interface area; the brazing connection method adds a transition layer at the interface to improve the interface quality, but due to the interface The addition of brazing material increases the production cost; the solid bimetal billet for die casting needs to be further perforated to obtain the hollow capillary tube, and the process is relatively complicated; after the tube blank is used for lost foam casting, the outer layer is casted with carbon steel tube billet by sand casting The method increases the cost of lost foam and sand mold production, and the process cost increases

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

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • A kind of preparation method of metal composite pipe blank with more than two layers
  • A kind of preparation method of metal composite pipe blank with more than two layers
  • A kind of preparation method of metal composite pipe blank with more than two layers

Examples

Experimental program
Comparison scheme
Effect test

preparation example Construction

[0035] The invention provides a method for preparing metal composite tube blanks with more than two layers, including raw material preparation; pipe fitting assembly; installation accessories; oxidation prevention and ventilation; preheating metal tubes; There are eight steps in the finishing of the billet, the specific steps are:

[0036] S1. Raw material preparation

[0037] Select two metal outer tubes 1 and metal inner tubes 2 to be combined, clean and remove oil and mud stains on the inner and outer surfaces, dry them and then use conventional mechanical methods such as sandblasting, grinding, wire brushing, etc., or conventional chemical Methods such as alkali washing or pickling, remove the scale on the inner surface of the metal outer tube 1 and the outer surface of the metal inner tube 2, and dry them for later use.

[0038] S2. Fitting assembly

[0039] Insert the metal inner tube 2 into the metal outer tube 1, insert the metal outer tube 1 and the metal inner tube...

Embodiment 1

[0056] Taking the preparation of 304 stainless steel / Q235 plain carbon steel / 304 stainless steel composite steel pipe as an example, the specific preparation method is shown in the schematic diagram figure 1 As shown, two 304 stainless steel pipes are selected as the metal outer pipe 1 and the metal inner pipe 2 respectively. Specifically, the outer diameter of the metal outer pipe 1 is φ219mm, the inner diameter is φ210mm, the wall thickness is 4.5mm, and the length is 2m. The outer diameter of the tube 2 is φ108mm, the inner diameter is φ100mm, the wall thickness is 4.0mm, and the length is 2m. The chemical composition of the metal outer tube 1 and the metal inner tube 2 is the same, both are 304 stainless steel; the metal melt of Q235 ordinary carbon steel is selected as Metal melt to be cast; use 8% mass fraction of sodium carbonate solution to clean the oil and mud stains on the inner and outer surfaces of the metal outer pipe 1 and metal inner pipe 2 to be compounded, and...

Embodiment 2

[0061] Taking the preparation of 16Mn low-alloy steel / 316 stainless steel composite square pipe as an example, the specific preparation method is shown in the schematic diagram figure 2 As shown, select two steel pipes, one of which is a 16Mn low-alloy square pipe as the metal outer pipe 1. The side length of the square pipe is 200×200mm, the wall thickness is 5mm, and the length is 2m. The other is a 316 stainless steel square pipe , as the metal inner tube 2, the side length of the square tube is 80×80mm, the wall thickness is 4.0mm, and the length is 2m; the metal melt of 16Mn low alloy steel is selected as the metal melt to be cast; the sodium carbonate solution of 10% mass fraction is adopted Clean the oil stains and mud stains on the inner and outer surfaces of the metal outer tube 1 and the metal inner tube 2 to be combined, and then use 10% by mass fraction of hydrochloric acid aqueous solution to pickle to remove the oxide scale on the inner surface of the metal outer...

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

PropertyMeasurementUnit
thicknessaaaaaaaaaa
Login to view more

Abstract

The invention provides a method for preparing metal composite tube blanks with more than two layers. The upper and lower ends of the pretreated metal inner tube and outer tube are respectively fixed on the ring seams of the upper and lower sealing flanges, forming a In the casting cavity, the casting device and the intake and exhaust device are installed through the upper sealing flange to exhaust and preheat the casting inner cavity, and pour metal melt into the casting cavity to form a composite tube blank, and cool the composite tube blank And finishing, to obtain high-quality composite tube. The method provided by the invention can prepare more than two layers of metal composite tube blanks with a solid-liquid phase metallurgical bonding interface that cannot be produced by existing methods. The process method of the invention has the advantages of simple process, low manufacturing cost, and excellent composite tube blank interface bonding quality Good quality, high yield, can prepare a variety of more than two-layer metal composite tube blanks and other characteristics.

Description

technical field [0001] The invention relates to a method for preparing metal tube blanks, which belongs to the field of layered metal composite materials, and is especially suitable for preparing metal composite tube blanks with more than two layers. Background technique [0002] Metal composite pipe is a pipe made of two or more metal pipes of different materials through mechanical or metallurgical methods. It makes full use of the advantages of two or more metals, saves rare and precious metals, and is cost-effective. Therefore, in recent years, composite double-layer or multi-layer metal pipes have become more and more popular. [0003] At present, there are many methods for preparing double-layer or multi-layer metal composite tube blanks. The most commonly used method is the nesting method, that is, the inner and outer surfaces of the two tube blanks to be compounded are cleaned first, and then one of the tube blanks is inserted into the Inside the other tube blank, co...

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
Patent Type & Authority Patents(China)
IPC IPC(8): B22D19/08
Inventor 井玉安
Owner 安徽巨鼎高分子科技股份有限公司
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Try Eureka
PatSnap group products

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

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap