Ti-containing Sn-based alloy and its smelting preparation method

A technology based on alloys and alloys, applied in the field of preparation of Sn-based alloys, to achieve the effects of good repeatability, easy mass production, and small size

Active Publication Date: 2008-02-06
西部超导材料科技股份有限公司
View PDF5 Cites 2 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This Sn-based alloy is obtained by high-temperature melting, and its preparation technology has been reported in related patents (Japanese Patent No. The smelting method uses Sn and pure Ti flakes as raw materials, and cast iron or stainless steel (Japanese patent) or Cu mold (US patent) as the casting mold, resulting in the maximum dispersed particle size of the Sn-Ti compound in the Sn-based alloy being 50 and 30 μm, respectively. The average size is 5-20μm, and the internal Sn method Nb prepared using this Sn-based alloy 3 The critical current density Jcn (12T, 4.2K) of the non-copper area of ​​the Sn strand is 650-750A / mm 2

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
  • Ti-containing Sn-based alloy and its smelting preparation method
  • Ti-containing Sn-based alloy and its smelting preparation method
  • Ti-containing Sn-based alloy and its smelting preparation method

Examples

Experimental program
Comparison scheme
Effect test

example 1

[0015] Use Sn and Sn-27%Ti (weight content) master alloy with a weight purity of 99.9% as raw materials, and put the raw materials with a total weight of 15-20Kg (wherein Ti weight content is 2.0%) into the graphite crucible of the medium frequency induction furnace , vacuum the medium frequency induction furnace to 10 -1 Pa is filled with Ar gas, and then vacuumized and filled with Ar gas. This process is repeated 3 times and then filled with Ar gas to 0.25-0.3Mpa. Raise the temperature of the raw material to 1200°C and keep it for 20 minutes to fully melt the Sn and Sn-Ti master alloy, then raise the temperature to 1450°C, and then quickly pour it into a water-cooled copper mold to obtain a Ti-containing Sn-based alloy ingot. The main part of the water-cooled copper mold has an outer diameter of Φ180mm, a height of 300mm, and an inner diameter of Φ105mm (upper end) and Φ96mm (lower end). The Ti content and component analysis result of the surface of the ingot and the upper ...

example 2

[0017] The smelting method of the Ti-containing Sn-based alloy is the same as that of Example 1, except that the content of Ti is adjusted when the raw materials are prepared, and the component analysis result of the weight content of Ti in the Ti-containing Sn-based alloy light ingot is 3%. In the Sn-based alloy, Ti is distributed in the Sn matrix in the form of Sn-Ti compound in fine dispersed particles. Sn-Ti compound is 100% Ti 6 sn 5 , the maximum size of the dispersed particles is not greater than 20 μm, and the average size is 5-10 μm.

example 3

[0019] The smelting method and composition ratio of the Ti-containing Sn-based alloy are the same as in Example 1, except that during the smelting process, when the raw material is heated up to 1300°C and kept for 20 minutes, the temperature is raised to ~1550°C, and then quickly poured into a special water-cooled copper mold. A Ti-containing Sn-based alloy ingot is obtained. At this time, the ingot and the special water-cooled copper mold have partial adhesion, which makes demoulding difficult, and the water-cooled copper mold suffers some damage. The Ti content of the Sn-based alloy and the phase composition and size of the dispersed particles are the same as in Example 1.

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
sizeaaaaaaaaaa
sizeaaaaaaaaaa
Login to view more

Abstract

The invention relates Sn-based alloy containing Ti and the method of smelting, which is used for Nb3Sn superconductive fold yarn. The method comprises the following characteristics: Sn-based alloy containing 2%-3wt% Ti, the compound made by Ti and Sn is distributed in Sn base in the form of small dispersion globularity or needle particle. The process comprises the following steps: using the Sn and Sn-Ti intermediate alloy as raw materials, melting them and carriying out moulding. Using the method, the size of Sn-Ti compound particle in Sn base is small, and the method improves the Jcn of inner Sn method Nb3Sn fold yarn.

Description

technical field [0001] A method for smelting and preparing Ti-containing Sn-based alloys, involving an internal Sn method Nb 3 Sn superconducting strands are used in Nb 3 The invention discloses a method for preparing a Ti-containing Sn-based alloy required for increasing the critical current density of high-field superconducting wires by adding Ti to the Sn layer. Background technique [0002] Nb 3 Sn superconducting strand is a high-field superconducting material with excellent superconducting properties, and Nb is prepared by the internal Sn method 3 Sn strands are the focus of competition in Europe, the United States, Japan and other developed countries in recent years. In order to increase the high-field superconducting critical current density Jcn of the strands, the Nb 3 Adding a small amount of Ti to Sn is one of the key technologies. For the internal Sn method preparation process, as long as the Sn core of the composite strand contains a small amount of Ti (Ti-...

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): C22C13/00C22C1/03B22D11/049
Inventor 唐先德张平祥李春广李昆杨明唐晓东王飞云冯勇卢亚锋周廉
Owner 西部超导材料科技股份有限公司
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