CN1155014A - Hard alloy for porcelain die - Google Patents
Hard alloy for porcelain die Download PDFInfo
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- CN1155014A CN1155014A CN 96119113 CN96119113A CN1155014A CN 1155014 A CN1155014 A CN 1155014A CN 96119113 CN96119113 CN 96119113 CN 96119113 A CN96119113 A CN 96119113A CN 1155014 A CN1155014 A CN 1155014A
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- wolfram varbide
- chromium
- nickel
- alloy
- molybdenum
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Abstract
The present invention relates to a hard alloy using tungsten carbide as base. Its basic composition (wt%) comprises tungsten carbide as hard phase 80-94, nickel 5-15, chromium 0.3-3 and molybdenum 0.5-3 which are used as cementing phase. Said invented product is a hard alloy with high wearability and resistance to corrosion, and is applicable to manufacture of battery die, mechanical sealing ring, valve, specially for making ceramic die.
Description
The invention belongs to the wolfram varbide is the Wimet of base.
At present, domestic whole employing quenched and tempered steel are made ceramic pressing mold, and import press pressing mold at random is no exception.General Wimet by hard phase wolfram varbide and bonding mutually cobalt or nickel forms, they are used for Mold Making, particularly during the floor tile tile mould, following shortcoming is arranged: 1. hardness is low, wear-resistant grain abradability is poor, the life-span lacks, and can only use 12 to 15 round the clock; 2. frequent, the mould replacing time of mold exchange long (6-8 hour) more, and the kiln that automatically rolls can not be lowered the temperature and be stopped production, and causes production efficiency to reduce, cost improves; 3. the peripheral scratch of stupalith is innumerable, influences the outward appearance of ceramic product.
The objective of the invention is, design the Wimet of a kind of high-wearing feature, high corrosion resistance, to satisfy the needs of ceramic die.
The present invention contains wolfram varbide, nickel, chromium, molybdenum, selects for use wolfram varbide to make the hard phase, and nickel, chromium, molybdenum are made the bonding phase, and the weight percent of its fundamental component is as follows: wolfram varbide 80～94%, nickel 5～15%, chromium 0.3～3%, molybdenum 0.5～3%.
Reach HRA88-89 and be equivalent to HRC72 through testing Wimet hardness of the present invention, can be used for ceramic die, battery mould, mechanical seal ring, valve etc.; The life-span can reach 120 round the clock when being used for the floor tile mould, even mould is scrapped because of product is overproof, and the still bright no scratch of the periphery of product because more the number of times of mold exchange obviously reduces, improves production efficiency greatly, if the die cost of a brick pressing machine input is identical, so, the mould of making of the present invention manys the ceramic tile of 240,000 yuan of productive values than the quenched and tempered steel mould, energy-conservation 1.5 ten thousand yuan, a machine increased production 57.6 ten thousand yuan in 1 year, energy-conservation 40,000 yuan.
The present invention selects the Young's modulus height for use, wear-resistant grain, and the strong wolfram varbide that weares and teares is made the hard phase, and its making is easy, and the source is abundant, and is cheap, selects for use the nickel more cheap 3 to 4 times than cobalt, chromium, molybdenum to make the bonding phase, and the cost of its alloy reduces, and function increases.Wolfram varbide content 80～94% (weight) among the present invention, be preferably 85～92%, also the titanium carbide of available a small amount of replaces wolfram varbide, but should not surpass 5% (weight), also can not be less than 1%, too many titanium carbide obviously descends alloy toughness, can not change erosion resistance very little, equally, also can add 0.3～3% chromium carbide to replace the wolfram varbide of equal amts, the influence that is brought very little is similar to titanium carbide too much; The purpose of selecting for use nickel to make the bonding phase is not only because its price is low, and main is because its electromotive force height, and erosion resistance is strong, and add-on 5～15% (weight), add-on are less than lower limit makes alloy very crisp, surpasses the upper limit alloy rigidity is reduced; Add chromium in the alloy, be intended to strengthen the erosion resistance of alloy, it and nickel is solid solution alloy generation associating corrosion resistance in sintering process, and add-on is 0.3～3%, surpasses the upper limit alloy is become fragile, and being lower than lower limit does not then have effect; The adding of molybdenum has further improved the erosion resistance of alloy, more adapts to this corrodibility of pottery; Because chromium and molybdenum all might form carbide in sintering process, alloy is become fragile lose practicality, so the total carbon in the wolfram varbide generally is controlled at 5.8～6.12%, are preferably in below 6.12%, realize nickel, chromium, molybdenum alloyization fully.
The wolfram varbide, nickel, chromium, molybdenum that will meet ratio be all by 250 eye mesh screens, with classical powder metallurgy process sintering 60 minutes in 1300 ℃～1450 ℃ vacuum oven, can obtain the Wimet of high-wearing feature, high corrosion resistance.Following table is the mechanical property table of three parts of samples of the present invention and a quenched and tempered steel.
| Alloy | Alloy ingredient | Hardness (HRA) | Bending strength (kg/mm) | Microstructure |
| Sample 1 sample 2 samples 3 | ?90WC?8Ni?1Cr?1Mo | ????91 | ????160 | Normally |
| ?88WC?9Ni?2Cr?1Mo | ????91 | ????180 | Normally | |
| ?86WC?10Ni?3Cr?1Mo | ????89 | ????200 | Normally | |
| Quenched and tempered steel | ?84.5WC?15Ni?0.5CrC | ????85 | ????200 | Normally |
The mechanical property of three duplicate samples of the present invention as seen from the above table reaches higher level, has high-wearing feature, high corrosion resistance.When the present invention is used for ceramic stock mould, can make blockyly, the shape of also can laminating is if make blocky, can with each alloy block by bonding or welding or down pin or other modes connect into a required whole alloy, should be fixed on the steel matrix by the integral body alloy again; If, this alloy slice can be fixed on the steel matrix by any one modes such as heat edge, welding, dovetail connect the alloy shape of laminating, and corresponding with the forming face of ceramic stock mould, can save a part of alloy material like this.
Claims (3)
1. Wimet that is used for ceramic die, it is characterized in that: this alloy contains wolfram varbide, nickel, chromium, molybdenum, wolfram varbide is made the hard phase, nickel, chromium, molybdenum are made the bonding phase, the weight percent of its fundamental component is as follows: wolfram varbide 80～94%, nickel 5～15%, chromium 0.3～3%, molybdenum 0.5～3%.
2. the Wimet that is used for ceramic die according to claim 1 is characterized in that: the titanium carbide of available 1%～5% weight percent replaces the wolfram varbide of same quantity.
3. the Wimet that is used for ceramic die according to claim 1 and 2 is characterized in that: the total carbon content in the wolfram varbide is 5.8～6.12% weight percents.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 96119113 CN1155014A (en) | 1996-07-15 | 1996-07-15 | Hard alloy for porcelain die |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 96119113 CN1155014A (en) | 1996-07-15 | 1996-07-15 | Hard alloy for porcelain die |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN1155014A true CN1155014A (en) | 1997-07-23 |
Family
ID=5125567
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 96119113 Pending CN1155014A (en) | 1996-07-15 | 1996-07-15 | Hard alloy for porcelain die |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN1155014A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1322219C (en) * | 2003-03-07 | 2007-06-20 | 江汉石油钻头股份有限公司 | Sealer for rotary drilling bit bearing |
| CN102400027A (en) * | 2011-10-21 | 2012-04-04 | 四川科力特硬质合金股份有限公司 | Sea water corrosion resistant hard alloy and preparation method thereof |
| CN107686925A (en) * | 2017-09-18 | 2018-02-13 | 张家港钻通设备有限公司 | A kind of drill bit Hardmetal materials |
-
1996
- 1996-07-15 CN CN 96119113 patent/CN1155014A/en active Pending
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1322219C (en) * | 2003-03-07 | 2007-06-20 | 江汉石油钻头股份有限公司 | Sealer for rotary drilling bit bearing |
| CN102400027A (en) * | 2011-10-21 | 2012-04-04 | 四川科力特硬质合金股份有限公司 | Sea water corrosion resistant hard alloy and preparation method thereof |
| CN107686925A (en) * | 2017-09-18 | 2018-02-13 | 张家港钻通设备有限公司 | A kind of drill bit Hardmetal materials |
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| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
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| C01 | Deemed withdrawal of patent application (patent law 1993) | ||
| WD01 | Invention patent application deemed withdrawn after publication |