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Boat contact material for hard alloy sintering

A contact material and cemented carbide technology, which is applied in the field of boats, can solve the problem of low temperature resistance of contact materials, and achieve the effects of improving high temperature corrosion resistance, reducing pollution and improving strength.

Inactive Publication Date: 2019-05-10
株洲金佰利硬质合金有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to provide a kind of sintered hard alloy boat contact material, to solve the problem that the traditional boat contact material in the above-mentioned background technology bears low temperature

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0021] According to the ratio of Ni: 35%, Fe: 17%, Cr: 16%, Si: 0.08%, Ta: 0.8%, Al: 1.2%, Ti: 0.2%, C: 0.08%, W: 29% of the raw materials in advance Proportioning;

[0022] (1) Pressing the wax film: select a medium-temperature casting wax material, and then use pressure to press the wax material into the shape, and take it out after it is cooled and solidified;

[0023] (2) Make a mould: mix the adhesive with the ingredients to make a refractory material, then smear it on the surface of the above-mentioned wax film, and apply it repeatedly 8 times to make a refractory mold with a thickness of 7-9mm;

[0024] (3) dewaxing: control the temperature in the autoclave to be 160 degrees Celsius, and adopt steam high pressure protection dewaxing;

[0025] (4) Roasting molding: place the mold after dewaxing in a high-temperature heating furnace, adopt continuous roasting, and gradually heat up, and heat to 835 degrees Celsius for roasting, roasting for 7.3 hours;

[0026] (5) Smelt...

Embodiment 2

[0028] Embodiment 2: The difference between this embodiment and the foregoing embodiment is:

[0029] According to the ratio of Ni: 34%, Fe: 16%, Cr: 15%, Si: 0.07%, Ta: 0.7%, Al: 1.0%, Ti: 0.15%, C: 0.07%, W: 33% of the raw materials in advance Proportioning;

[0030] (1) Pressing the wax film: select a medium-temperature casting wax material, and then use pressure to press the wax material into the shape, and take it out after it is cooled and solidified;

[0031] (2) Make a mould: mix the adhesive with the ingredients to make a refractory material, then smear it on the surface of the above-mentioned wax film, and apply it repeatedly 9 times to make a refractory mold with a thickness of 7-9mm;

[0032] (3) dewaxing: control the temperature in the autoclave to be 160 degrees Celsius, and adopt steam high pressure protection dewaxing;

[0033] (4) Roast molding: place the mold after dewaxing in a high-temperature heating furnace, adopt continuous roasting, and gradually heat...

Embodiment 3

[0036] Embodiment three: the difference between this embodiment and the foregoing embodiment is:

[0037] According to the ratio of Ni: 35%, Fe: 17%, Cr: 16%, Si: 0.08%, Ta: 0.8%, Al: 1.2%, Ti: 0.2%, C: 0.08%, W: 29% of the raw materials in advance Proportioning;

[0038] (1) Pressing the wax film: select a medium-temperature casting wax material, and then use pressure to press the wax material into the shape, and take it out after it is cooled and solidified;

[0039] (2) Make a mould: mix the adhesive with the ingredients to make a refractory material, then smear it on the surface of the above-mentioned wax film, and apply it repeatedly 9 times to make a refractory mold with a thickness of 7-9mm;

[0040] (3) dewaxing: control the temperature in the autoclave to be 200 degrees Celsius, and adopt steam high pressure protection dewaxing;

[0041] (4) Roasting molding: place the mold after dewaxing in a high-temperature heating furnace, adopt continuous roasting, and graduall...

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PUM

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Abstract

The invention discloses a boat contact material for hard alloy sintering. The boat contact material comprises the following components of, in percentage by mass, 34-46% of Ni, 16-27% of Fe, 13-21% ofCr, 0.05-0.1% of Si, 0.5-1.5% of Ta, 1-2% of Al, 0.3% or less of Ti, 0.1% or less of C, and the balance W and inevitable impurities. A process method for manufacturing the boat contact material comprises the following steps that (1) a wax film is pressed, specifically, a medium-temperature casting wax material is selected, then the wax material is subjected to press-in and forming by using pressure, and then the wax material is taken out after being cooled and solidified; and (2) a die is manufactured, specifically, an adhesive and ingredients are mixed to prepare a refractory material to coatthe surface of the wax film. According to the boat contact material, an Ni-Fe-Cr-W series alloy is adopted, and by means of Al elements, the strength of a boat can be improved, and pollution from impurities is reduced; and through addition of Ti elements, the high-temperature corrosion resistance of the boat can be improved, the bearing temperature of the boat is greatly increased, and therefore,the effects of not peeling off and not sticking the boat are achieved.

Description

technical field [0001] The invention relates to the technical field of boats, in particular to a boat contact material for sintered hard alloy. Background technique [0002] At present, tungsten-molybdenum powder reduction alloy boats at home and abroad are generally made of pure nickel, nickel-chromium superalloy casting or stainless steel welding. It has the advantages of good high-temperature strength, small deformation, and low production cost. Compared with other boat materials and boat processing The process has obvious advantages and is favored by the cemented carbide production industry. However, cast high-temperature alloy boats have various defects such as low temperature (about 900°C), short service life, and easy sticking of boats. For example, pure nickel boats using casting technology have relatively stable performance at high temperatures. However, during use, the surface of the nickel boat is easily bonded to the tungsten-molybdenum powder material, that is,...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C30/00B22C9/04B22C9/24
Inventor 卿林胡志祥杨宇何惧何安
Owner 株洲金佰利硬质合金有限公司