CN101591739A - A kind of preparation method of quinary P-type hard alloy - Google Patents
A kind of preparation method of quinary P-type hard alloy Download PDFInfo
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- CN101591739A CN101591739A CNA2009100996204A CN200910099620A CN101591739A CN 101591739 A CN101591739 A CN 101591739A CN A2009100996204 A CNA2009100996204 A CN A2009100996204A CN 200910099620 A CN200910099620 A CN 200910099620A CN 101591739 A CN101591739 A CN 101591739A
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Abstract
The present invention relates to a kind of preparation method of quinary P-type hard alloy, described quinary P-type hard alloy is made up of the component of following weight percent: hard phase titanium carbide 16%, tantalum carbide 8%, niobium carbide 6%, cobalt 10%, lanthanum 0.006%, surplus is a hard phase wolfram varbide; Described preparation method comprises the steps: each component is mixed the back by the wet-milling of tilting wet wheeling machine, discharging after the wet-milling; Go into wax, granulation by spraying drying, mouldenpress compression moulding, vacuum sintering, temper promptly obtains sintering finished.The existing very high bending strength of the product of the present invention preparation, good shock strength, have good red hardness again, uses the large-scale alloy forged piece of product roughing of the present invention, neither forge a knife during use, suitable raising working (machining) efficiency, cutter life is also very long.
Description
(1) technical field
The present invention relates to a kind of preparation method of quinary P-type hard alloy.
(2) background technology
Large-scale alloy steel forging is as weight equipments such as water power, thermoelectricity, nuclear power, cracking of oil and gelatin liquefactions.Because large-scale alloy forged piece roughing machining amount is big, difficult processing, it is the manufacturing bottleneck of weight equipment, weight equipment is that the bottleneck in the processing mainly is that its following characteristics cause: first, after finishing, large-scale alloy steel forging blank casting need on large-scale water pressure engine, open die forging form, its single-piece weight is at tens tons or ton up to a hundred, forged precision can't be compared with small-sized forging, not only its machining surplus is very big, and surface irregularity, therefore large-scale alloy steel forging cutwork amount is very big, and the second, in the slow naturally process of cooling of large-scale alloy steel forging after forging is finished, owing to making upper layer hardness inhomogeneous towards different, zone of oxidation is also very thick, thus the unfavorable especially machining of casting skin layer, the 3rd, the material of large-scale alloy steel forging generally all is the high performance alloys steel, not only cutting force is very big during cutting, and heat in metal cutting is also very high, and the point of a knife temperature can reach about 800～1000 degree during the cutting of top layer.
Existing P series hard alloy is the cutting tool material of various steel, be divided into 5 series such as p01 p10 p20 p30 p40 according to international ISO513:1991 standard, from P01～P40, its bending strength improves gradually, and hardness and red hardness reduce gradually, from P40～P01, then hardness and red hardness improve gradually, bending strength then reduces gradually, for the roughing of large-scale firm forging, if select the processing of P20 series hard alloy cutter for use, though the fine insufficient strength of red hardness is forged a knife once cutting, if select the processing of P40 series hard alloy cutter for use, do not forge a knife though the shock resistance of cutter is fine, because red hardness deficiency and tool wear is very fast, cutter life is very short, therefore can only select P30 series hard alloy cutter for use, facts have proved for many years, the p30 cutter is also often forged a knife when roughing, and the not enough life-span of red hardness is not long yet simultaneously.
(3) summary of the invention
Technical problem to be solved by this invention is that the large-scale steel forgings of Wimet roughing is easily forged a knife in the prior art, the problem that efficient is low and cutter life is short, and provide a kind of preparation method of 5 yuan of P series hard alloys, the existing very high bending strength of product and the impact of preparation, the ideal cutter life is arranged again, simultaneously can also improve working (machining) efficiency, thereby solve the bottleneck problem that the rough machined difficult problem of large-scale alloy steel forging and heavy-duty machinery industry are raised the efficiency.
A kind of preparation method of quinary P-type hard alloy, described quinary P-type hard alloy is made up of the component of following weight percent: hard phase titanium carbide 16%, tantalum carbide 8%, niobium carbide 6%, cobalt 10%, lanthanum 0.006%, surplus is a hard phase wolfram varbide;
Described preparation method comprises the steps: each component is mixed the back by the wet-milling of tilting wet wheeling machine, discharging after the wet-milling; Go into wax, granulation by spraying drying, mouldenpress compression moulding, vacuum sintering, temper promptly obtains sintering finished.
Preferably, in the described wet-milling process: the wet-milling time is 60 hours, and the ratio of grinding media to material example is 5: 1, and wet grinding media is a dehydrated alcohol.
Preferably, the sintering temperature of described vacuum sintering is 1480 ℃, and sintering pressure is 60Mpa.
The quinary P-type hard alloy physical performance index that preparation method of the present invention obtains is as follows: proportion is 9.85g/cm
3, hardness HRA is 92.5, bending strength is 2400N/mm
2, red hardness: 89～91 °/800～1000 ℃, mean particle size is 0.6～0.8 μ.
The theoretical foundation that preparing product of the present invention has excellent properties is as follows:
First: guarantee excellent properties of the present invention from the chemical constitution design of product, in the chemical constitution of WC-Tic-TaC-NbC-Co-La quinary P-type hard alloy of the present invention, hard phase WC total amount is about 60%, bonding phase cobalt is between 8～12%, and all the other are that ultra-fine high abrasion consumption, high performance material are formed.The general trade mark of every physical performance index of the present invention on the market.
Second guarantees the excellent properties of invention product from the metallographic microstructure structure of product, and sosoloid is thicker in the product metallographic microstructure of the present invention, so can make product that favorable shock resistance is arranged and make product that better heat-resisting be arranged.Thereby, when adopting Wimet of the present invention to carry out the large-scale steel forgings of roughing, can suitably improve stock-removing efficiency, cutter life is also very long.
The existing very high bending strength of the product of the present invention preparation, good shock strength, have good red hardness again, uses the large-scale alloy forged piece of product roughing of the present invention, neither forge a knife during use, suitable raising working (machining) efficiency, cutter life is also very long.
(4) description of drawings
The metallographic microstructure structure iron of the quinary P-type hard alloy that Fig. 1 prepares for the present invention.
(5) embodiment
Below by drawings and Examples technical scheme of the present invention is done detailed description further, but protection scope of the present invention is not limited to this.
With reference to Fig. 1, a kind of preparation method of quinary P-type hard alloy, described quinary P-type hard alloy is made up of the component of following weight percent: hard phase titanium carbide 16%, tantalum carbide 8%, niobium carbide 6%, cobalt 10%, lanthanum 0.006%, surplus are hard phase wolfram varbide;
Described preparation method comprises the steps: each component is mixed the back by the wet-milling of tilting wet wheeling machine, discharging after the wet-milling; Go into wax, granulation by spraying drying, mouldenpress compression moulding, vacuum sintering, temper promptly obtains sintering finished.
In the described wet-milling process: the wet-milling time is 60 hours, and the ratio of grinding media to material example is 5: 1, and wet grinding media is a dehydrated alcohol.The sintering temperature of described vacuum sintering is 1480 ℃, and sintering pressure is 60Mpa.
The Wimet physical performance index such as the following table 1 that adopt aforesaid method to make:
Table 1
| Physical data Physical data | Density D ensity (g/cm 3) 9.85 hardness Hardness (HRA), 92.5 bending strength TRS (N/mm 2)2400 |
| Porosity Porosity | Category-A hole A Porosity A04 category-B hole B Porosity B00 non-compound carbon space C Porosity C00 |
| Structure Structure | WC grain degree Grain size ofWC 0.8 μ m |
| Recommended use | Be used for roughing, the large-scale steel forgings of precision work |
Claims (3)
1, a kind of preparation method of quinary P-type hard alloy is characterized in that: described quinary P-type hard alloy is made up of the component of following weight percent: hard phase titanium carbide 16%, tantalum carbide 8%, niobium carbide 6%, cobalt 10%, lanthanum 0.006%, surplus is a hard phase wolfram varbide;
Described preparation method comprises the steps: each component is mixed the back by the wet-milling of tilting wet wheeling machine, discharging after the wet-milling; Go into wax, granulation by spraying drying, mouldenpress compression moulding, vacuum sintering, temper promptly obtains sintering finished.
2, according to the preparation method of the described quinary P-type hard alloy of claim 1, it is characterized in that: in the described wet-milling process: the wet-milling time is 60 hours, and the ratio of grinding media to material example is 5: 1, and wet grinding media is a dehydrated alcohol.
3, according to the preparation method of claim 1 or 2 described quinary P-type hard alloys, it is characterized in that: the sintering temperature of described vacuum sintering is 1480 ℃, and sintering pressure is 60Mpa.
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| Application Number | Priority Date | Filing Date | Title |
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| CN2009100996204A CN101591739B (en) | 2009-06-11 | 2009-06-11 | Method for preparing quinary P-type hard alloy |
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| CN2009100996204A CN101591739B (en) | 2009-06-11 | 2009-06-11 | Method for preparing quinary P-type hard alloy |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102019424A (en) * | 2010-10-14 | 2011-04-20 | 浙江恒成硬质合金有限公司 | Method for manufacturing hard alloy numerical control blade |
| CN105039764A (en) * | 2015-07-28 | 2015-11-11 | 常州西利合金工具有限公司 | Method for preparing high-hardness hard alloy material special for diamond coating |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| SE412417B (en) * | 1973-01-18 | 1980-03-03 | Massachusetts Inst Technology | CUTTING TOOLS OF VOLFRAKBARID AND PROCEDURES BEFORE ITS MANUFACTURING |
| CN101403066B (en) * | 2008-10-31 | 2010-09-29 | 牡丹江工具有限责任公司 | Four-element P series hard alloy |
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2009
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102019424A (en) * | 2010-10-14 | 2011-04-20 | 浙江恒成硬质合金有限公司 | Method for manufacturing hard alloy numerical control blade |
| CN105039764A (en) * | 2015-07-28 | 2015-11-11 | 常州西利合金工具有限公司 | Method for preparing high-hardness hard alloy material special for diamond coating |
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Denomination of invention: A Preparation Method of Five Element P-type Cemented Carbides Effective date of registration: 20230630 Granted publication date: 20110720 Pledgee: Dongyang Branch of China Construction Bank Co.,Ltd. Pledgor: ZHEJIANG HENGCHENG CEMENTED CARBIDE Co.,Ltd. Registration number: Y2023330001295 |
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