Method for preparing tungsten base high specific gravity alloy board

A high specific gravity, alloy plate technology, applied in metal rolling, metal rolling, metal processing equipment and other directions, can solve the problems of high production cost, easy cracking, high cost, achieve excellent mechanical properties, improve thermoplasticity, production process less effect

Active Publication Date: 2005-06-01
WESTERN METAL MATERIAL
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Problems solved by technology

The plates produced by the first two methods are limited by the specifications. Among them, the production cost of the wire cutting method is relatively high, and the insufficient performance of the produced plates is also a problem, and neither of them can be mass-produced; the third method is to use powder metall

Method used

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Examples

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preparation example Construction

[0014] A preparation method of a tungsten-based high specific gravity alloy plate is characterized in that the preparation process is as follows: a. W powder with Fsss Fisherman's average particle size of 2.8 to 3.2 μm, nickel Ni powder, iron Fe powder, and a small amount of cobalt Co powder and yttrium Y powder are mixed and compacted in a mixing machine; b. Under the protection of hydrogen gas, the billet is heated to 1490°C-1500°C in a sintering furnace at a rate of 15°C / min for 2 hours to obtain a slab; c. .Using the stainless steel plate as the jacket material for the prepared slab to carry out jacket rolling, the rolling temperature is 700 ℃ ~ 900 ℃, the processing rate of the first pass is 25% ~ 30% when the billet is opened, and then every The pass processing rate is 18% to 23%, and when the total processing rate reaches 45% to 50%, the vacuum degree is 6×10 -3 Pa, the temperature is 1000 ℃ ~ 1250 ℃, vacuum heat treatment for 1 ~ 2 hours to eliminate stress; then choos...

Embodiment 1

[0018] Put tungsten W powder with Fsss average particle size of 2.8-3.2 μm, nickel Ni powder, iron Fe powder, trace amount of cobalt Co powder and yttrium Y powder in a mixer with a steel ball to raw material weight ratio of 5:2 , the mixing time is 12 hours, the rotating speed of the drum is 40r / min, and it stops for 20min at 6 hours. Press the billet, under the protection of hydrogen gas, heat the billet in the sintering furnace at a rate of 15°C / min to 1490°C for 2 hours to obtain a slab; use the prepared slab thickness of 1.2mm stainless steel plate as the sheathing material, carry out Sheath rolling, the rolling temperature is 700°C, the processing rate of the first pass is 25% when the billet is opened, and the processing rate of each subsequent pass is 18%. When the total processing rate reaches 45%, alkali washing and alkali cleaning The liquid ratio is 85% NaOH + 15% KNO 3 , Alkali temperature: 380 ℃, alkaline washing for 10 minutes, after the alkaline washing time i...

Embodiment 2

[0020] Mix tungsten W powder with Fsss average particle size of 2.8-3.2 μm, nickel Ni powder, iron Fe powder, trace amount of cobalt Co powder and yttrium Y powder in a mixer with a steel ball to raw material weight ratio of 5:1 Inside, the mixing time is 12 hours, the rotating speed of the drum is 60r / min, and it stops for 20min at 6 hours. Press the billet, under the protection of hydrogen gas, heat the billet in the sintering furnace at a rate of 15°C / min to 1500°C for 2 hours to obtain a slab; c. Use the prepared slab thickness of 1.7mm stainless steel plate as the sheathing material , carrying out clad rolling, the rolling temperature is 900°C, the processing rate of the first pass is 30% when the billet is opened, and the processing rate of each subsequent pass is 23%, and when the total processing rate reaches 50%, alkali cleaning is carried out. The ratio of lye is 85%NaOH+15%KNO 3 , Alkali temperature: 500 ℃, alkaline washing time: 2 minutes, after alkaline washing, ...

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Abstract

The present invention is the powder metallurgical and hot plastic treating process of producing high precision W-base great specific weight W-Ni-Fe alloy plate. The production process includes the successive steps of: mixing W powder, Ni powder, Fe powder and small amount of Co powder and Y powder of average granularity 2.8-3.2 microns, pressing into blank, sintering, canning rolling, annealing at 1000-1100 deg.c, and finish rolling. The plate has excellent mechanism performance and may be used widely in medical electronics, nuclear industry, chemical metallurgy and other industries.

Description

Technical field: [0001] A method for preparing a tungsten-based high-density alloy plate relates to a method for producing high-precision tungsten-based high-density alloy (W-Ni-Fe) plates by using powder metallurgy and thermoplastic processing methods. technical background [0002] At present, a large number of tungsten-based high-density alloy plates are required in aviation devices, radiation screens, ray baffles and chemical industries. Due to the limitation of production methods, the manufacturing cost is relatively high. Production technologies at home and abroad are generally divided into powder metallurgy rolling plus liquid phase sintering, sintered billet wire cutting and multi-pass rolling plus vacuum heat treatment. The plates produced by the first two methods are limited by the specifications. Among them, the production cost of the wire cutting method is relatively high, and the insufficient performance of the produced plates is also a problem, and neither of th...

Claims

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Application Information

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IPC IPC(8): B21B47/00B22F5/00
Inventor 冯宝奇郭让民王国栋白宏斌梁静刘宁平赵鸿磊武宇
Owner WESTERN METAL MATERIAL
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