CN105671399A - Hard alloy low in sintering temperature - Google Patents
Hard alloy low in sintering temperature Download PDFInfo
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- CN105671399A CN105671399A CN201410668582.0A CN201410668582A CN105671399A CN 105671399 A CN105671399 A CN 105671399A CN 201410668582 A CN201410668582 A CN 201410668582A CN 105671399 A CN105671399 A CN 105671399A
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Abstract
The invention discloses hard alloy low in sintering temperature. The hard alloy is formed by sintering WC powder, nickel phosphorus powder, C powder and Co powder which are subjected to mixing, grinding, filtering, drying and molding. The hard alloy comprises 88-82 parts of the WC powder with the Fisher particle size being 0.3-0.8 [mu]m, 0.7-1.0 part of the nickel phosphorus powder with the Fisher particle size being 0.6-1.0 [mu]m, 0.2-1.0 part of the C powder and 10-16 parts of the Co powder. According to the hard alloy low in sintering temperature, due to the fact that the nickel phosphorus powder and the C powder are added, the sintering temperature of the hard alloy during sintering molding is lowered; the sintering process of the hard alloy low in sintering temperature can be completed at the sintering temperature of 1280 DEG C or lower, and the hard alloy has no obvious difference on the magnetic force, the cobalt magnetism, the magnetic saturation, the bending strength, the density, the Rockwell hardness, the Vickers hardness and the other performances, so that the working efficiency of the sintering link is improved under the condition that the product quality is not reduced, and the defects that an existing common hard alloy material is high in sintering temperature, long in sintering time and low in efficiency are overcome.
Description
Technical field
The present invention relates to Hardmetal materials manufacturing technology field, relate in particular to the Wimet of a kind of sintering temperature and low.
Background technology
Printed circuit board (PCB) (PCB-PrintedCircuitBoard) is the basic constitutive requirements that all electronics and IT products are indispensable, is also the product that in global electronic component products, market share occupation rate is the highest. The miniaturization of the upper installation elements of the printed circuit board (PCB) of the product such as mobile telephone, notebook computer, has not only promoted the development of printed circuit board miniaturization, and also serves promoter action for the circuitous pattern of printed circuit board is meticulous.
Crossing one of the important component part that hole is PCB, its effect is the fixing or pilot hole of the electrical connection passage between each layer and device, and with PCB, micro-to creep into row machine drilling be the most frequently used at present working method.
The ultra-fine cemented carbide that the material of micro-brill is mainly traditional is made in industry, due to Modern appliances more and more intelligence and volume miniaturization, the printed circuit board Manufacturing Technology Development speed of thin wire, narrow spacing is very fast, the novel material of PCB version is also more and more harder, and this just requires that the micro-drill bit material capability processing printing board PCB hole develops to higher intensity, hardness, wear resistance direction.
Due to the high-wearing feature of Wimet, determine that Wimet can improve the compactness of product in process of production by the sintering process of High Temperature High Pressure, thus, in the sintering process of general CEMENTED CARBIDE PRODUCTION process, top temperature, all more than 1350 degree, like this, will expend the long period in process of production and improve sintering temperature and cooling, cause sintering process consuming time longer, thus become the bottleneck that in CEMENTED CARBIDE PRODUCTION process, efficiency improves. If but sintering temperature does not reach more than 1350 degree, easily there is crackle and the defect of compactness difference in the Wimet sintered out.
Summary of the invention
It is an object of the invention to provide the Wimet of a kind of sintering temperature and low, with in the CEMENTED CARBIDE PRODUCTION process of WC/Co base, when raw material ratio, add certain P(phosphorus wherein) and C(carbon), effect is to reduce sintering temperature, control sintering temperature can complete sintering process below 1280, can also ensure the quality of product simultaneously, to overcoming the sintering temperature height of current ordinary rigid alloy material, sintering time length, inefficient defect.
In order to realize above-mentioned purpose, the technical solution adopted in the present invention is:
A Wimet for sintering temperature and low, described Wimet by following raw material through mixing, grinding, filtration drying, shaping after sinter; With total weight, in raw material, the weight part number of each component is: Fisher particle size is 88～82 parts, the WC powder of 0.3～0.8um, and Fisher particle size is 0.7～1.0 part, the nickel phosphorus powder of 0.6～1.0um, 0.2～1.0 part, C powder, 10～16 parts, Co powder;
The processing step of the Wimet preparation method of this sintering temperature and low is:
(1) each material component is chosen by above-mentioned materials formula;
(2) Co powder and nickel phosphorus powder is first added, select the agitating ball mill of 1Kg, alcohol is added as grinding medium in the ratio of 400ml/kg, add grinding ball by ratio of grinding media to material example 5:1, carry out agitation grinding, grinding spherical diameter D4, ball mill stirring velocity 850rpm, stacking factor is 0.65, grinds 1 hour, forms slip;
And then add WC powder and grind 3 hours, (3) Wimet slip is formed;
(4) filtration, drying, the order number of filtration is 40～50 orders, and drying temperature is 50～95 DEG C, makes carbide alloy mixture grain;
(5) by carbide alloy mixture grain by mold pressing or extruding or injection moulding, hard alloy blank is made;
(6) hard alloy blank entering sintering oven and carry out sinter molding, sintering temperature during sinter molding is 1250～1280 DEG C, Ar pressure is 8～10Mpa, sintering time is 30～150min.
Compared with prior art, useful effect acquired by the present invention is:
The Wimet of the sintering temperature and low of the present invention, owing to adding nickel phosphorus powder and carbon dust, thus sintering temperature when reducing sinter molding, the Wimet of sintering temperature and low can complete sintering process in sintering temperature below 1280, but the performance no significant difference such as the magnetic force of this Wimet, cobalt magnetic, magneticsaturation, bending strength, density, Rockwell hardness, Vickers' hardness, when not reducing the quality of product, improve the working efficiency of sintering link, overcome the sintering temperature height of current ordinary rigid alloy material, sintering time length, inefficient defect.
Performance perameter after the Wimet of the sintering temperature and low of the present invention and common sintering cemented carbide is:
Wherein GK10UF-1 is the common Wimet performance perameter after normal sintering, and GK10UF-2 is the performance perameter after the sintering cemented carbide of the sintering temperature and low of the present invention.
Embodiment
Below in conjunction with specific embodiment, the present invention is further described.
Embodiment 1:
(1) by formula for raw stock, choose 88 parts, the WC powder that Fisher particle size is 0.3, Fisher particle size be 0.6 0.7 part, nickel phosphorus powder, 0.2 part, C powder, 10 parts, Co powder;
(2) Co powder and nickel phosphorus powder is first added, select the agitating ball mill of 1Kg, alcohol is added as grinding medium in the ratio of 400ml/kg, add grinding ball by ratio of grinding media to material example 5:1, carry out agitation grinding, grinding spherical diameter D4, ball mill stirring velocity 850rpm, stacking factor is 0.65, grinds 1 hour, forms slip;
And then add WC powder and grind 3 hours, (3) Wimet slip is formed;
(4) filtration, drying, the order number of filtration is 40 orders, and drying temperature is 50 DEG C, makes carbide alloy mixture grain;
(5) by carbide alloy mixture grain by mold pressing or extruding or injection moulding, hard alloy blank is made;
(6) hard alloy blank entering sintering oven and carry out sinter molding, sintering temperature during sinter molding is 1250 DEG C, Ar pressure is 8Mpa, sintering time is 150min.
Embodiment 2:
(1) by formula for raw stock, choosing 82 parts, the WC powder that Fisher particle size is 0.8um, Fisher particle size is 1.0 parts, the nickel phosphorus powder of 1.0um, 1.0 parts, C powder, 16 parts, Co powder;
(2) Co powder and nickel phosphorus powder is first added, select the agitating ball mill of 1Kg, alcohol is added as grinding medium in the ratio of 400ml/kg, add grinding ball by ratio of grinding media to material example 5:1, carry out agitation grinding, grinding spherical diameter D4, ball mill stirring velocity 850rpm, stacking factor is 0.65, grinds 1 hour, forms slip;
And then add WC powder and grind 3 hours, (3) Wimet slip is formed;
(4) filtration, drying, the order number of filtration is 50 orders, and drying temperature is 95 DEG C, makes carbide alloy mixture grain;
(5) by carbide alloy mixture grain by mold pressing or extruding or injection moulding, hard alloy blank is made;
(6) hard alloy blank entering sintering oven and carry out sinter molding, sintering temperature during sinter molding is 1280 DEG C, Ar pressure is 10Mpa, sintering time is 30min.
Embodiment 3:
(1) by formula for raw stock, choosing 85 parts, the WC powder that Fisher particle size is 0.5um, Fisher particle size is 0.9 part, the nickel phosphorus powder of 0.8um, 0.5 part, C powder, 12 parts, Co powder;
(2) Co powder and nickel phosphorus powder is first added, select the agitating ball mill of 1Kg, alcohol is added as grinding medium in the ratio of 400ml/kg, add grinding ball by ratio of grinding media to material example 5:1, carry out agitation grinding, grinding spherical diameter D4, ball mill stirring velocity 850rpm, stacking factor is 0.65, grinds 1 hour, forms slip;
And then add WC powder and grind 3 hours, (3) Wimet slip is formed;
(4) filtration, drying, the order number of filtration is 45 orders, and drying temperature is 70 DEG C, makes carbide alloy mixture grain;
(5) by carbide alloy mixture grain by mold pressing or extruding or injection moulding, hard alloy blank is made;
(6) hard alloy blank entering sintering oven and carry out sinter molding, sintering temperature during sinter molding is 1260 DEG C, Ar pressure is 9Mpa, sintering time is 100min.
The technical scheme of the present invention is not limited to the restriction of above-mentioned specific embodiment, and every technology distortion made according to the technical scheme of the present invention, all falls within protection scope of the present invention.
Claims (1)
1. a Wimet for sintering temperature and low, described Wimet by following raw material through mixing, grinding, filtration drying, shaping after sinter; It is characterized in that:
With total weight, in raw material, the weight part number of each component is: Fisher particle size is 88～82 parts, the WC powder of 0.3～0.8um, and Fisher particle size is 0.7～1.0 part, the nickel phosphorus powder of 0.6～1.0um, 0.2～1.0 part, C powder, 10～16 parts, Co powder;
The processing step of the Wimet preparation method of this sintering temperature and low is:
(1) each material component is chosen by above-mentioned materials formula;
(2) Co powder and nickel phosphorus powder is first added, select the agitating ball mill of 1Kg, alcohol is added as grinding medium in the ratio of 400ml/kg, add grinding ball by ratio of grinding media to material example 5:1, carry out agitation grinding, grinding spherical diameter D4, ball mill stirring velocity 850rpm, stacking factor is 0.65, grinds 1 hour, forms slip;
And then add WC powder and grind 3 hours, (3) Wimet slip is formed;
(4) filtration, drying, the order number of filtration is 40～50 orders, and drying temperature is 50～95 DEG C, makes carbide alloy mixture grain;
(5) by carbide alloy mixture grain by mold pressing or extruding or injection moulding, hard alloy blank is made;
(6) hard alloy blank entering sintering oven and carry out sinter molding, sintering temperature during sinter molding is 1250～1280 DEG C, Ar pressure is 8～10Mpa, sintering time is 30～150min.
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| CN201410668582.0A CN105671399A (en) | 2014-11-21 | 2014-11-21 | Hard alloy low in sintering temperature |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105886870A (en) * | 2016-06-26 | 2016-08-24 | 苏州思创源博电子科技有限公司 | Preparation method of tungsten alloy with CrAlSiN composite coating |
| CN107541635A (en) * | 2016-06-27 | 2018-01-05 | 天津明源机械设备有限公司 | A kind of hard alloy of sintering temperature and low |
| CN108296404A (en) * | 2017-12-29 | 2018-07-20 | 冷水江天宝实业有限公司 | A kind of high speed nut molding machine nut stroke mould and its lower mold core |
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| CN103667757A (en) * | 2013-12-12 | 2014-03-26 | 河南省大地合金股份有限公司 | Preparation method of hard alloy bar for PCB (Printed Circuit Board) micro drill |
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2014
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| CN101186981A (en) * | 2007-12-21 | 2008-05-28 | 北京工业大学 | High-intensity high-tenacity super fine crystal WC-10Co hard alloy preparation method |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105886870A (en) * | 2016-06-26 | 2016-08-24 | 苏州思创源博电子科技有限公司 | Preparation method of tungsten alloy with CrAlSiN composite coating |
| CN107541635A (en) * | 2016-06-27 | 2018-01-05 | 天津明源机械设备有限公司 | A kind of hard alloy of sintering temperature and low |
| CN108296404A (en) * | 2017-12-29 | 2018-07-20 | 冷水江天宝实业有限公司 | A kind of high speed nut molding machine nut stroke mould and its lower mold core |
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Application publication date: 20160615 |