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

Palladium base alloy resistance strain material and preparation method thereof

A resistance strain, palladium-based alloy technology is applied in the field of water-cooled silver mold rapid solidification preparation of palladium-based alloy resistance strain materials. The effect of low and high tensile strength

Inactive Publication Date: 2018-03-27
KUNMING INST OF PRECIOUS METALS
View PDF6 Cites 5 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The palladium-based alloy prepared by the traditional copper mold casting method has well-developed lateral columnar crystals and obvious transgranular structure, which leads to poor processing performance of the alloy ingot, serious brittleness, cracking, and fracture, and the ingot is prone to defects such as uneven composition and pores. , causing the strength of the alloy to decrease, the temperature coefficient of resistance to increase, and the overall performance of the alloy to decrease significantly
[0003] In order to solve the problems of poor processing performance and unstable product quality of palladium-based alloys
Invention patent specification "A palladium alloy and its preparation method (CN104232975B)" adopts technologies such as high-energy ball mill, cold isostatic pressing, vacuum sintering, hot forging, drawing and heat treatment to prepare PdWMoRe multi-element palladium alloy. Although the production cost is reduced, However, the process is long, and impurities such as Fe and C are easily introduced during the high-energy ball milling process.
[0005] There is no literature report on the preparation of palladium-based alloy resistance strain material by water-cooled silver mold rapid solidification process

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

[0016] 1. Use metal raw materials with a purity greater than 99.99%, and carry out alloy batching according to the mass fraction percentage of 5.2% Ni, 5.2% Zr, 2% Ta, 8.5% W, and the balance of 2% Ru as Pd;

[0017] 2. Using high-frequency induction heating to melt the alloy in a zirconia crucible with a vacuum of 10 -2 Pa, filled with high-purity argon to positive pressure and smelted;

[0018] 3. After the alloy is completely melted, it is refined for 5 minutes, and then sucked and cast into a water-cooled silver mold for rapid solidification to obtain an ingot. The inlet temperature of the cooling water in the water-cooled silver mold is 18°C, and the flow rate of the cooling water is 20L / min;

[0019] 4. The ingot is hot-forged at 1200°C into a cylindrical shape with a diameter of Φ15mm; rolled at 900°C into a bar with a size of Φ8mm, and the deformation of each rolling pass is 10%; drawing at room temperature, the deformation of each drawing pass 8%, and the total drawi...

Embodiment 2

[0021] 1. Use metal raw materials with a purity greater than 99.99%, and carry out alloy batching according to the mass fraction percentage of 5.1% Ni, 5.1% Zr, 2% Ta, 8.5% W, and the balance of 2% Ag as Pd;

[0022] 2. Using high-frequency induction heating to melt the alloy in a zirconia crucible with a vacuum of 10 -2 Pa, filled with high-purity argon to positive pressure and smelted;

[0023] 3. After the alloy is completely melted, it is refined for 10 minutes, and then sucked and cast into a water-cooled silver mold for rapid solidification to obtain an ingot. The inlet temperature of the cooling water in the water-cooled silver mold is 15°C, and the flow rate of the cooling water is 30L / min;

[0024] 4. The ingot is hot-forged at 1200°C into a cylindrical shape with a diameter of Φ10mm; rolled at 900°C into a bar with a size of Φ5mm, and the deformation of the rolling pass is 10%; drawing at room temperature, the deformation of the drawing pass 6%, and the total drawin...

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
diameteraaaaaaaaaa
tensile strengthaaaaaaaaaa
electrical resistivityaaaaaaaaaa
Login to View More

Abstract

The invention discloses a palladium base alloy resistance strain material and a preparation method thereof, and relates to a water cooling silver mold quick solidification process for preparing the palladium base alloy resistance strain material. The palladium base alloy resistance strain material comprises the following components in percentage by mass: 0-10 of Ni, 0-10 of Zr, 0-5 of Ta, 5-15 ofW, and the balance of Pd. At least one of 0-5 of Ag, 0-5 of Ru, 0-2 of Ir and 0-2 of Rh can be added in the palladium base alloy resistance strain material. The alloy nucleation speed is accelerated;the alloy grain is refined; and the alloy component segregation is improved. The prepared material is higher in tensile strength and resistivity and lower in resistance temperature coefficient, and can be used for precise potentiometers in such fields as aviation electric appliances, precise instruments and high-reliability instruments; the tensile strength reaches 1200-1800 MPa; the resistivity reaches 80-95 u omega.cm; and the resistance temperature coefficient is reduced to 40-55 ppm / DEG C.

Description

technical field [0001] The invention relates to a palladium-based alloy material, in particular to a preparation method for rapid solidification of a water-cooled silver mold of a palladium-based alloy resistance strain material. Background technique [0002] Palladium-based alloys, including Pd-W and Pd-Ag, have good comprehensive properties, such as high resistivity, low temperature coefficient of resistance, high hardness and strength, good wear resistance and oxidation resistance, and are mainly used as Resistance strain materials for precision potentiometers are widely used in aviation electrical appliances, precision instruments, high-reliability instruments and other fields. The palladium-based alloy prepared by the traditional copper mold casting method has well-developed lateral columnar crystals and obvious transgranular structure, which leads to poor processing performance of the alloy ingot, serious brittleness, cracking, and fracture, and the ingot is prone to d...

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 Applications(China)
IPC IPC(8): C22C5/04C22C1/02B22D18/06B21C37/04
CPCC22C5/04B21C37/047B22D18/06C22C1/02
Inventor 王松张吉明谢明陈永泰杨有才王塞北胡洁琼李爱坤程勇
Owner KUNMING INST OF PRECIOUS METALS
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