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Method for preparing invar alloy resonance bar

A technology of Invar alloy and resonant rod, which is applied in the field of preparing Invar alloy resonant rod, can solve the problems of high cost and large waste of raw materials, and achieve the effects of low cost, uniform raw material composition and high sintering density

Inactive Publication Date: 2016-09-07
HUIZHOU WEIBO HARDWARE PROD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Invar alloy resonant rods are generally produced by mechanical processing and stamping. The cost of mechanical processing is high, the waste of raw materials is large, and the cost is high; the stamping method is suitable for products with thin wall thickness and low tensile ratio. For structural Products with a little complexity, deeper inner hole depth, larger wall thickness, and flanging cannot be processed

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] Low-carbon carbonyl iron powder by weight percentage: carbonyl nickel powder is the ratio of 65:35 to prepare the metal powder, and then mix it in a three-dimensional conical mixer for 40 minutes to obtain a uniformly mixed metal mixed powder. The binder consists of 85% poly Formaldehyde, 8% high-density polyethylene, 3% polypropylene, 2% industrial paraffin, 2% stearic acid, the filling amount of the powder is 55%, and the mixed powder and binder are mixed in 10L (unit l) Double "Z" kneading and granulation integrated machine (this equipment can be directly obtained from the market) is mixed and granulated to make feed, and injected on the JSW-60H injection machine, the injection temperature is 180 ° C, the injection pressure is 85Mpa, the mold The temperature is 100°C, and the injection time is 2 seconds. The resulting blank is heated to 100°C in a catalytic degreasing furnace, and concentrated nitric acid is added dropwise at a rate of 3 g / min, and the degreasing is p...

Embodiment 2

[0026] Low-carbon carbonyl iron powder by weight percentage: carbonyl nickel powder is the ratio of 65:35 to prepare the metal powder, and then mix it in a three-dimensional conical mixer for 40 minutes to obtain a uniformly mixed metal mixed powder. The binder consists of 85% poly Formaldehyde, 8% high-density polyethylene, 3% polypropylene, 2% industrial paraffin, 2% stearic acid, the filling amount of the powder is 58%, and the mixed powder and binder are mixed in 10L double " Mix and granulate in the Z” type kneading and granulating integrated machine to make feed, inject molding on JSW-60H injection machine, injection temperature is 200°C, injection pressure is 105Mpa, mold temperature is 120°C, injection time is 3 seconds, and the resulting molding blank In the catalytic degreasing furnace, raise the temperature to 120°C, add concentrated nitric acid dropwise at a rate of 5 g / min, and degrease for 8 hours. The degreasing body is sintered in a Shimadzu VHSg-40 / 40 / 150MN deg...

Embodiment 3

[0028] Low-carbon carbonyl iron powder by weight percentage: carbonyl nickel powder is the ratio of 63:37 to prepare the metal powder, then mix it in a three-dimensional conical mixer for 40 minutes to obtain a uniformly mixed metal mixed powder, and the binder consists of 85% poly Formaldehyde, 5% high-density polyethylene, 5% polypropylene, 4% industrial paraffin, 1% stearic acid, the filling amount of the powder is 56%, and the mixed powder and binder are mixed in 10L double " Mix and granulate in the Z” type kneading and granulating integrated machine to make feed, injection molding on JSW-60H injection machine, injection temperature 190°C, injection pressure 95Mpa, mold temperature 110°C, injection time 2 seconds, the obtained molding blank In the catalytic degreasing furnace, the temperature was raised to 120°C, concentrated nitric acid was added dropwise at a rate of 3 g / min, and the degreasing was performed for 6 hours. 5°C / min heating rate to 1230°C, 30 liters / min of ...

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Abstract

A method for preparing an invar alloy resonance bar includes the following steps: a, preparation of mixed powder; b, preparation of feeding materials; c, injection molding; d, debinding; and e, sintering. The raw materials are even in ingredients and are fine in particles; the sintering density of products are high, the feeding materials are even during feeding; the density of the obtained product workblank is even during infection molding after material feeding; product shrinkage is consistent during sintering, and sintered products do not need any post mechanical machining; the feeding materials can be reused, and the utilization rate of the materials can reach 100%; catalytic debinding is adopted, the products are not out of shape, debinding is fast, the efficiency is high, and the debinding is complete; the obtained products are high in size accuracy, is consistent in product performance, is high in yield and efficiency, and is low in cost, and mass production can be achieved. The thermal expansion coefficient of the produced invar alloy resonance bar by adoption of the method is 1.5X10-6 / DEG C, and can reach 1.8X10-8 / DEG C in the condition of 36% nickel, and will not change in the indoor temperature of -80-+100 DEG C, the density is greater than 98%, and the silver, gold and nickel can be directly electroplated.

Description

technical field [0001] The invention belongs to the technical field of powder metallurgy, and particularly provides a method for preparing an invar alloy resonant rod. Background technique [0002] The resonant rod is a 3G / 4G communication base station passive device accessory, cavity power divider, coupler, duplexer, filter, combiner, and transmitter. In order to ensure the stability of the signal, the resonant rod must be kept Dimensional stability, not affected by temperature changes. Invar alloy (Invar alloy), also known as Invar alloy, is a constant expansion alloy with good electrical, magnetic and mechanical properties, especially its small average expansion coefficient, which is widely used in the electronics and communication industries. Invar alloy resonant rods are generally produced by mechanical processing and stamping. The cost of mechanical processing is high, the waste of raw materials is large, and the cost is high; the stamping method is suitable for produ...

Claims

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Application Information

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IPC IPC(8): B22F3/22B22F3/10B22F1/00
CPCB22F3/1021B22F3/225B22F2998/10B22F1/103B22F1/10
Inventor 郭忠臣张亮白珍敏高波杨伟
Owner HUIZHOU WEIBO HARDWARE PROD
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