CN1183315A - Temperature and density manufacturing process of diamond segment - Google Patents
Temperature and density manufacturing process of diamond segment Download PDFInfo
- Publication number
- CN1183315A CN1183315A CN 96117186 CN96117186A CN1183315A CN 1183315 A CN1183315 A CN 1183315A CN 96117186 CN96117186 CN 96117186 CN 96117186 A CN96117186 A CN 96117186A CN 1183315 A CN1183315 A CN 1183315A
- Authority
- CN
- China
- Prior art keywords
- mould
- diamond
- manufacturing process
- sintering
- powder
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
- 239000010432 diamond Substances 0.000 title claims abstract description 31
- 229910003460 diamond Inorganic materials 0.000 title claims abstract description 31
- 238000004519 manufacturing process Methods 0.000 title claims abstract description 23
- 238000000034 method Methods 0.000 claims abstract description 19
- 239000000463 material Substances 0.000 claims abstract description 11
- 238000003825 pressing Methods 0.000 claims abstract description 11
- 239000000843 powder Substances 0.000 claims abstract description 9
- 238000005245 sintering Methods 0.000 claims abstract description 8
- 238000000748 compression moulding Methods 0.000 claims description 5
- 239000012190 activator Substances 0.000 claims description 2
- 150000002366 halogen compounds Chemical class 0.000 claims description 2
- 238000007689 inspection Methods 0.000 claims description 2
- 238000005056 compaction Methods 0.000 claims 1
- 238000007906 compression Methods 0.000 claims 1
- 238000012856 packing Methods 0.000 claims 1
- 239000013078 crystal Substances 0.000 abstract description 4
- 238000010438 heat treatment Methods 0.000 abstract description 2
- 238000000280 densification Methods 0.000 abstract 2
- 230000007547 defect Effects 0.000 abstract 1
- 238000005516 engineering process Methods 0.000 description 5
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 3
- 238000005520 cutting process Methods 0.000 description 3
- 229910002804 graphite Inorganic materials 0.000 description 3
- 239000010439 graphite Substances 0.000 description 3
- 230000002950 deficient Effects 0.000 description 2
- 238000004663 powder metallurgy Methods 0.000 description 2
- 239000000758 substrate Substances 0.000 description 2
- 239000002699 waste material Substances 0.000 description 2
- 230000003044 adaptive effect Effects 0.000 description 1
- 238000005452 bending Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000007731 hot pressing Methods 0.000 description 1
- 238000011031 large-scale manufacturing process Methods 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 238000000465 moulding Methods 0.000 description 1
- 230000003647 oxidation Effects 0.000 description 1
- 238000007254 oxidation reaction Methods 0.000 description 1
- 230000002035 prolonged effect Effects 0.000 description 1
Landscapes
- Powder Metallurgy (AREA)
- Press-Shaping Or Shaping Using Conveyers (AREA)
Abstract
The invention discloses a process for manufacturing diamond segments (tool bits) by temperature densification, which comprises the steps of filling powder and diamond single crystals into a mold at one time, rapidly heating the material and the mold to 150-170 ℃, pressing the material and the mold into a green body by using medium pressure (about 400 MPa), wherein the density of the green body can reach more than 96% of a theoretical value, and then carrying out vacuum sintering densification treatment on the green body. The process overcomes the defects of the existing diamond segment manufacturing process, the produced diamond tool bit has high quality, low cost and accurate batch size, and lays a foundation for automatic mass production.
Description
The present invention relates to the manufacturing process of a kind of diamond block (cutter head).
Domestic diamond block (cutter head) manufacturer all adopts " heat pressing process ", 95% above producer is workshop-based extensive production, after being about to the carcass metal powder material and diamond single crystal mixing of diamond segment, pack in the graphite jig, mould is raised to about 900 ℃ with electrical heating method, use forcing press compression moulding, again briquet is carried out the size reconditioning after the depanning.The finished product that this manufacturing process is produced, if will obtain the hardness (HRC) that high strength (6bb) just must be directed at carcass material rises simultaneously, though the result makes diamond segment wear-resisting, but diamond is difficult to sword, not sharp, operating efficiency is low, if will sacrifice hardness, then intensity descends rapidly, and cutter head is very short service life as a result.
Secondly, the diamond segment of heat pressing process manufacturing is mould with graphite, easily causes graphite to pollute, and is difficult to make configuration stressed minimum when work of cutter head, the easiliest goes out sword and life-saving, is difficult to realize being suitable for cutting needed best mechanics configuration.
The 3rd, the diamond segment cost that heat pressing process is made is higher, can't overcome the waste of carcass powder and valuable diamond single crystal etc., power consumption big (1 degree/piece), die cost height (about 0.17 yuan/piece).
The 4th, the diamond block that heat pressing process is made, unstable product quality is used the later stage at mould, and the relative quantity of the appearance and size error of moulding joint piece surpasses 20%, is difficult to realize automated production in enormous quantities.
Developed countries begins to eliminate the heat pressing process of diamond block from the eighties, and the traditional cold-rolled sintered technology of employing powder metallurgy, this technology has just adopted more advanced large-tonnage machine on colding pressing giving, sintering process has then been carried out adaptive improvement, it is big that the diamond block of being produced has overcome waste basically, the cost height, be difficult to batch automatic production and be difficult to realization be suitable for cutting defectives such as needed best mechanics configuration, but the compactness of carcass is good not as hot pressing, do not reach 98% of theoretical value, and be difficult to reach more high-quality, more low-cost, the domestic slightly good price of its cutter head mass ratio but is more than six times of home products.
The objective of the invention is to overcome the many defectives in the existing diamond block manufacturing process, provide the brand-new technology of a kind of manufacturing diamond block (cutter head): warm close manufacturing process, both be different from heat pressing process, also be different from cold-rolled sintered technology, high-quality for diamond block, low cost, automation large-scale production are in batches laid a good foundation.
The warm close manufacturing process of diamond block of the present invention (cutter head), be after the carcass powder that will prepare and diamond single crystal artificial (or automatic machine) are once simply adorned mould, to expect and mould simultaneously between the piece speed heat temperature raising to 150～170 ℃, this moment, powder also had little time quick oxidation, promptly use middle pressure (about 400MPa) compacting green compact, the density of this base substrate can reach more than 96% of theoretical value, pass through closeization of vacuum-sintering processing again to base substrate, the conventional reverse will take place in the performance of manufactured goods, reach the purpose of the phase of giving.
Cutter head with the warm close fabrication process of diamond block (cutter head), mechanical performance has improved a lot, its carcass has very high intensity, and but hardness is lower, not only guaranteed the wearability of carcass but also guaranteed that diamond easily goes out the knife edge profit, simultaneously it is shaped to is suitable for cutting required best mechanics configuration, has prolonged service life.
The close manufacturing process of temperature has also reduced the manufacturing cost of cutter head greatly, its material and valuable caratloss, and the consumption of electric power and mould descends 15～20%, 60～70%, 80～90% respectively than heat pressing process.If the ＂ high-tech overlay film diamond ＂ that uses high-tech development portion of Hefei Division, Chinese Academy of Sciences to finish for the end of the year 95, use the joint piece (cutter head) that warm close manufacturing process is made again, its quality index improves 40～50% than present domestic level, and manufacturing cost reduces by 30～40%.
The characteristics of the close manufacturing process of temperature are that the close ＂ of ＂ temperature has changed the conventional phenomenon in the powder metallurgy, the cutter head that same carcass material is made, its intensity (bending resistance 6bb) on average improves 20%, its hardness (HRC) but on average descends 20%, make simultaneously the cutter head density that produces near and reach 99.6%～100% of theoretical value, thereby the quality height, stable performance, cost is low.
Be described in further detail below in conjunction with the warm close process for making of accompanying drawing diamond block of the present invention (cutter head).
Fig. 1 is the warm close process for making block diagram of diamond block of the present invention (cutter head).
A among the figure: be that the material body for preparing is once packed in the special mould,, must add 0.2～1% halogen compound in the material as activator for guaranteeing the requirement of warm close technology.
B, C, D process are finished step by step by ＂ diamond block make-up machine ＂ among the figure, and overall process is controlled automatically by relevant control system.Its technological requirement is: B-powder and mould are warmed up between 150～170 ℃, heating-up time≤20S; The pressure of C-compression moulding is about 400MPa, and the material heart during pressing blank and the die wall temperature difference are ± 1 ℃.
E, F process are finished step by step by closeization of vacuum-sintering stove among the figure, and overall process also is automatically control, sintering temperature 〉=950 ℃.
G-product inspection is by manually finishing among the figure.
Claims (2)
1. the warm close manufacturing process of a diamond block is characterized in that: it is by artificial or automatic machine charging, and---powder heats up with mould, and------mould unloading---form in vacuum-sintering---final densification---by operations such as product inspection automatically in compression moulding.
2. the close manufacturing process of temperature according to claim 1 is characterized in that: the material body for preparing must add 0.2～1% halogen compound and make activator, in the special mould of once packing into; Powder and mould heat up, compression moulding, and processes such as automatic mould unloading are by ＂ diamond block make-up machine, and " substep is automatically finished, and wherein powder and mould are warmed up between 150～170 ℃, heating-up time≤20S; The pressure of compression moulding is about 400MPa, and the material heart during pressing blank and the die wall temperature difference are ± 1 ℃, and vacuum-sintering and final compaction process are automatically finished by closeization of vacuum-sintering stove substep, sintering temperature 〉=950 ℃.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 96117186 CN1183315A (en) | 1996-11-22 | 1996-11-22 | Temperature and density manufacturing process of diamond segment |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 96117186 CN1183315A (en) | 1996-11-22 | 1996-11-22 | Temperature and density manufacturing process of diamond segment |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN1183315A true CN1183315A (en) | 1998-06-03 |
Family
ID=5124119
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 96117186 Pending CN1183315A (en) | 1996-11-22 | 1996-11-22 | Temperature and density manufacturing process of diamond segment |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN1183315A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1918312B (en) * | 2004-01-09 | 2010-10-06 | Was.A.S.公司 | Method of producing diamond segments for cutting tools |
-
1996
- 1996-11-22 CN CN 96117186 patent/CN1183315A/en active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1918312B (en) * | 2004-01-09 | 2010-10-06 | Was.A.S.公司 | Method of producing diamond segments for cutting tools |
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|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C01 | Deemed withdrawal of patent application (patent law 1993) | ||
| WD01 | Invention patent application deemed withdrawn after publication |