Processing method of platinum-rhodium alloy wire with high rhodium content

The technology of a platinum-rhodium alloy and its processing method is applied in the processing field of platinum-rhodium alloy wire with high rhodium content, which can solve the problems of low processing efficiency, increased loss of precious metals, large consumption of auxiliary materials, etc., and achieve good use effect and small loss of precious metals , The effect of stable product quality

Inactive Publication Date: 2020-11-06
英特派铂业股份有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] (1) If the finished platinum-rhodium alloy wire has a thinner wire diameter, due to the small processing rate of each pass, many processing passes are required, resulting in low processing efficiency and large consumption of auxiliary materials. At the same time, the multi-pass processing process increases the loss of precious metals ;
[0005] (2) Due to factors such as hardening and lubrication of cold-processed wire, defects such as white spots, knots, and cracks often appear on the surface, which seriously affect the appearance and service life of the product

Method used

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  • Processing method of platinum-rhodium alloy wire with high rhodium content
  • Processing method of platinum-rhodium alloy wire with high rhodium content
  • Processing method of platinum-rhodium alloy wire with high rhodium content

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] Example 1 High temperature drawing equipment

[0026] like Figure 1-3 As shown, it specifically includes a pay-off barrel 1, a wire release frame 2, a wire tractor 3, a high-temperature furnace 4, a wire take-up barrel 5, a wire take-up frame 6, a wire drawing die 8, an atmosphere cooling pipe 9 and a frame 10 connected in sequence. ;

[0027] The frame 10 is sequentially provided with a pay-off barrel 1, a wire tractor 3, a high-temperature furnace 4 and a take-up barrel 5; the pay-off barrel 1 is provided with a wire release frame 2; wireframe 6;

[0028] A wire drawing die 8 and an atmosphere cooling pipe 9 are also provided between the high temperature furnace 4 and the wire take-up barrel 5; the wire drawing die 8 and the atmosphere cooling pipe 9 are also arranged on the frame 10.

[0029] The wire 7 passes through the pay-off barrel 1 , the wire puller 3 , the high-temperature furnace 4 , the wire drawing die 8 , the atmosphere cooling pipe 9 to the take-up b...

Embodiment 2

[0030] Example 2 PtRh30 wire, target wire diameter φ0.1mm, the steps are as follows:

[0031] (1) Vacuum smelting: Weigh 600.1g of rhodium powder with a purity of SM-Rh99.95% and 1399.9g of pure platinum with a purity of SM-Pt99.95%, put them into a vacuum induction furnace for melting and exhaust, and the vacuum degree is less than 30Pa, after smelting for 1h, cast it into a cylindrical water-cooled copper mold with a diameter of φ22mm under the protection of inert gas;

[0032] (2) Hot forging into bars: Put the ingot obtained in step (1) into an annealing furnace for homogenization annealing and forging. The annealing and forging process is as follows: after holding at 1300°C for 0.5h, take out the hot forging at a processing rate of 30% and then anneal again, repeat the above operation until the ingot is forged to a 10×10mm bar;

[0033] (3) Long rolling and round rolling: use a rolling machine to process the bar obtained in step (2) to φ4.0mm;

[0034] (4) High-temperat...

Embodiment 3

[0036] Example 3 PtRh40 wire material, target wire diameter φ0.5mm, the steps are as follows:

[0037] 1) Vacuum melting: Weigh 800.3g of rhodium powder with a purity of SM-Rh99.95% and 1199.7g of pure platinum with a purity of SM-Pt99.95%, put them into a vacuum induction furnace for melting and exhaust, and the vacuum degree is less than 30Pa , after smelting for 1h, cast it into a cylindrical water-cooled copper mold with a diameter of φ22mm under the protection of an inert gas;

[0038] (2) Hot forging into bars: Put the ingot obtained in step (1) into an annealing furnace for homogenization annealing and forging. The annealing and forging process is as follows: after holding at 1300°C for 0.5h, take out the hot forging at a processing rate of 20% and then anneal again, repeat the above operation until the ingot is forged to a 10×10mm bar;

[0039] (3) Long rolling and round rolling: use a rolling machine to process the bar obtained in step (2) to φ4.0mm;

[0040] (4) Hi...

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Abstract

The invention relates to a processing method of a platinum-rhodium alloy wire with high rhodium content, and belongs to the technical field of metal materials. After vacuum melting, hot forging into strips, rolling into long and round shape, and high temperature drawing, the platinum-rhodium alloy wire between phi 0.1mm and phi 3.0mm is finally obtained. The platinum-rhodium alloy wire material prepared by the invention is smooth and round in surface, has no defects such as white spots, knots, and chaps, can be used in the fields of heating components, temperature measurement and the like, andis good in using effect. The platinum-rhodium alloy wire with high rhodium content is prepared by adopting the vacuum melting and high temperature drawing process, and compared with traditional coldprocessing, the processing method of the platinum-rhodium alloy wire with the high rhodium content provided by the invention has the advantages of being short in processing cycle, low in precious metal loss, stable in product quality and the like.

Description

technical field [0001] The invention relates to a processing method of platinum-rhodium alloy wire with high rhodium content, belonging to the technical field of metal materials. Background technique [0002] Platinum and platinum-rhodium alloys are widely used in the glass industry, catalytic nets, heating elements and temperature measurement. Among them, platinum-rhodium alloy wire with high rhodium content is an extremely important application category, such as PtRh30-PtRh6 thermocouple wire, PtRh40-PtRh20 thermocouple wire, PtRh40 heating wire, etc. [0003] Due to the high strength and extremely fast hardening rate of platinum-rhodium alloy with high rhodium content, its processing is very difficult. The traditional cold working process has the following disadvantages: [0004] (1) If the finished platinum-rhodium alloy wire has a thinner wire diameter, due to the small processing rate of each pass, many processing passes are required, resulting in low processing effic...

Claims

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Application Information

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IPC IPC(8): C22C1/02C22C5/04C22F1/14B21C37/04
CPCB21C37/047C22C1/02C22C5/04C22F1/14
Inventor 王志江何蔓周佳磊金英杰施卫锋吴雨
Owner 英特派铂业股份有限公司
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