Preparation method of double-layer or multi-layer metal composite pipe blank

A multi-layer metal and composite pipe technology is applied in the field of preparing double-layer or multi-layer metal composite pipe blanks and metal pipe blanks, which can solve the problem of increasing the cost of lost foam and sand mold production, worsening the toughness of the interface zone, and increasing the production cost. and other problems, to achieve the effect of clear composite interface, improved interface bonding strength, and improved composite quality.

Active Publication Date: 2015-12-23
安徽巨鼎高分子科技股份有限公司
View PDF24 Cites 10 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 tr

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
  • Preparation method of double-layer or multi-layer metal composite pipe blank
  • Preparation method of double-layer or multi-layer metal composite pipe blank
  • Preparation method of double-layer or multi-layer metal composite pipe blank

Examples

Experimental program
Comparison scheme
Effect test

preparation example Construction

[0035] The invention provides a method for preparing a double-layer or multi-layer metal composite tube blank, including raw material preparation; pipe fitting assembly; installing accessories; anti-oxidation ventilation; preheating the metal tube; pouring metal melt; cooling the composite tube blank; There are eight steps for finishing the composite tube blank, 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...

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 schematic diagram is as follows figure 2 As shown, two steel pipes are selected, 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 o...

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 preparation method of a double-layer or multi-layer metal composite pipe blank. The preparation method comprises the steps that the upper ends of a pretreated inner metal pipe and a pretreated outer metal pipe and the lower ends of the pretreated inner metal pipe and the pretreated outer metal pipe are fixed to circular seams of an upper sealing flange and a lower sealing flange respectively, and a casting cavity is formed between the inner metal pipe and the outer metal pipe; a casting device and an air inlet and exhaust device are arranged through the upper sealing flange to carry out exhausting and preheating on the casting cavity; metal melt is poured into the casting cavity to form a composite pipe blank; and the composite pipe blank is cooled and finished, and the excellent composite pipe blank is obtained. According to the method, the double-layer or multi-layer metal composite pipe blank which cannot be produced through existing methods and is provided with a solid-liquid phase metallurgical bonding interface can be prepared, and the technological method has the beneficial effects of being simple in technology, low in manufacturing cost, good in interface bonding quality of the composite pipe blank, high in yield, capable of being used for preparing various double-layer or multi-layer metal composite pipe blanks and the like.

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 double-layer or multi-layer metal composite tube blanks. 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, ...

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): 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