CN104668686A - Low-temperature brazing method of cutter - Google Patents
Low-temperature brazing method of cutter Download PDFInfo
- Publication number
- CN104668686A CN104668686A CN201510105914.9A CN201510105914A CN104668686A CN 104668686 A CN104668686 A CN 104668686A CN 201510105914 A CN201510105914 A CN 201510105914A CN 104668686 A CN104668686 A CN 104668686A
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- CN
- China
- Prior art keywords
- steel part
- brazing
- carbide chip
- solder
- copper
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Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
- B23K1/00—Soldering, e.g. brazing, or unsoldering
- B23K1/0008—Soldering, e.g. brazing, or unsoldering specially adapted for particular articles or work
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
- B23K1/00—Soldering, e.g. brazing, or unsoldering
- B23K1/20—Preliminary treatment of work or areas to be soldered, e.g. in respect of a galvanic coating
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
- B23K2101/00—Articles made by soldering, welding or cutting
- B23K2101/20—Tools
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Heat Treatment Of Articles (AREA)
- Earth Drilling (AREA)
Abstract
The invention relates to a low-temperature brazing method of a cutter. A low-temperature brazing parent part and a hard alloy blade are adopted, brazing flux is coated onto the surfaces of the parent part, brazing filler metal, a copper sheet and the hard alloy blade, the brazing filler metal is added between the parent part and the copper sheet or between the hard alloy blade and the copper sheet, the copper sheet is respectively welded onto the parent part and the hard alloy blade, then the welded part is immediately placed in a heat preserving furnace at 280-300 DEG C for preserving heat for 6-7h, the part is cooled to room temperature with the furnace after the temperature is decreased to 100-150 DEG C and the heat is preserved for 10-12h, the bottom of base metal is slowly heated, heating is stopped when the brazing flux starts to melt and can freely flow, heating is continuously performed when the brazing flux cannot flow smoothly, repetition for several times is performed in such way to weld the hard alloy blade onto the base metal, and finally the welded part is cooled to room temperature with the furnace in the heat preserving surface at 100-150 DEG C. The low-temperature brazing method of the cutter has the advantage of high production efficiency and avoids the problems that the hard alloy blade is cracked and ruptured and the like.
Description
Technical field
The present invention relates to tooling cost, particularly a kind of method of low temperature brazing cutter.
Background technology
Low temperature brazing technology belongs to solder, often using 450 DEG C of lines of demarcation as soft or hard soldering.Soldering adopts the solder lower than mother metal melting temperature, operating temperature lower than mother metal solid phase higher than a kind of solder technology of solder liquidus curve.During soldering, brazing filler metal melts is liquid, and mother metal remains solid-state, liquid solder in the gap of mother metal or on the surface moistening, capillary flow, fill, sprawl, interact (dissolve, spread or produce intermetallic compound) with mother metal, cooled and solidified forms firmly joint, thus is linked together by mother metal.
At present, conventional 700 DEG C ~ 800 DEG C high temperature brazings of the soldering of cutter steel part and carbide alloy have come, but postwelding easily occurs crackle because both thermal coefficient of expansions are at normal temperatures different, even ruptures.Carbide alloy occurs crackle is that thermal stress is excessive and causes, in Fast Heating or cooling procedure, due to the internal and external temperature difference of carbide alloy own, make heating process inside produce tension, cooling procedure outside produces tension.On the other hand, after welding completes, solder solidifies, cutter begins to cool down, and the thermal coefficient of expansion due to steel part is 2 ~ 3 times of carbide alloy, steel part from carbide alloy produces different contractions, the result of shrinking gradually, carbide alloy just produces tension and compression, and exceed the tensile strength position of carbide alloy in tension, carbide chip will crack.This gives to produce and process and brings many troubles, in order to improve the success rate of soldering, adopting the method for low temperature brazing, solving this difficult problem well.
Summary of the invention
The object of the invention is to the shortcoming overcoming prior art, provide that a kind of production efficiency is high, the method for the impaired little low temperature brazing cutter of carbide chip.
Object of the present invention is achieved through the following technical solutions: a kind of employing low temperature brazing welding steel part and hard alloy cutter method, and it comprises the following steps:
S1, pre-treatment: carbide chip is carried out blasting treatment, then carry out cleaning and degreasing process respectively by parent steel part, carbide chip and solder;
S2, soldering copper: brazing flux is heated to be cooked into pasty state, again brazing flux is applied to the surface of parent steel part, solder, copper sheet and carbide chip, and solder is added between parent steel part and copper sheet, the copper of one deck 0.25 ~ 0.5mm thickness is welded at the face of weld of parent steel part, similarly, the copper of one deck 0.25 ~ 0.5mm thickness is also welded at the face of weld of carbide chip;
S3, welded after, parent steel part and carbide chip are placed on immediately in the holding furnace of 280 DEG C ~ 300 DEG C and are incubated after 6 ~ 7 hours, slow cooling, when temperature drops to 100 DEG C ~ 150 DEG C, then closes holding furnace after being incubated 10 ~ 12h, is cooled to normal temperature with stove;
The surface of S4, milling brazing: will be welded with the parent steel part of copper and carbide chip respectively at the copper of milling machine mill off 0.08 ~ 0.10mm, the surface planarity after milling ensures between 0 ~ 0.03mm, removes welding slag;
S5, heating and soaking: the solder side of carbide chip is placed on the solder side of parent steel part, bottom slow heating parent steel part, soaking, when solder starts fusing and can flow freely, stops heating, when solder flowing is not smooth, continue heating, 2 ~ 6 times so repeatedly, in this process, changing of the relative positions carbide chip, carbide chip is welded on parent steel part the most at last;
S6, slow cooling: in the holding furnace of 100 DEG C ~ 150 DEG C, be cooled to normal temperature with stove;
S7, scarfing cinder: after Wetted constructures, remove welding slag, checks without after rosin joint, obtain product.
Further, in step s3, slow cooling is specially cooling per hour and is no more than 30 DEG C.
Further, the method for a kind of low temperature brazing cutter according to claim 1, is characterized in that: in step s 5, adopts high-frequency induction heating, and temperature is controlled between 260 DEG C ~ 300 DEG C.
The present invention has the following advantages:
1, by adopting low temperature brazing welding carbide chip, make the internal organizational structure change of steel part little, when welding with carbide alloy, its contingent expansion, Strength Changes and distortion are all smaller, avoid carbide chip and occur the problem such as crackle, fracture.
2, low temperature brazing reduces process time greatly than high temperature brazing, improves production efficiency.
3, the brazing filler metal melts temperature used is low, and during welding, solder flux is not easily burnt, and the scope of selectable flux compounds is relatively wider, and low temperature brazing length can reach about 600mm, breaches the bottleneck of high-temperature soldering length at below 300mm.
4, low temperature brazing solves all difficulties that large-area brazing can not be processed for a long time, and not only rosin joint is few, and carbide alloy occurs that the situation of crackle and fracture also significantly reduces, and advantage is obvious especially compared with high temperature brazing.
Detailed description of the invention
The present invention will be further described below, but protection scope of the present invention is not limited to the following stated.
[embodiment 1]:
A kind of employing low temperature brazing welding steel part and hard alloy cutter method, it comprises the following steps:
S1, pre-treatment: carbide chip is carried out blasting treatment, then carry out cleaning and degreasing process respectively by parent steel part, carbide chip and solder;
S2, soldering copper: brazing flux is heated to be cooked into pasty state, again brazing flux is applied to the surface of parent steel part, solder, copper sheet and carbide chip, and solder is added between parent steel part and copper sheet, the copper of one deck 0.25mm thickness is welded at the face of weld of parent steel part, similarly, the copper of one deck 0.25mm thickness is also welded at the face of weld of carbide chip;
S3, welded after, immediately parent steel part and carbide chip are placed in the holding furnace of 280 DEG C and are incubated after 6 hours, slow cooling, slow cooling is specially cooling per hour and is no more than 30 DEG C, when temperature drops to 100 DEG C, then close holding furnace after being incubated 12h, be cooled to normal temperature with stove;
The surface of S4, milling brazing: will be welded with the parent steel part of copper and carbide chip respectively at the copper of milling machine mill off 0.10mm, the surface planarity after milling ensures between 0 ~ 0.03mm, removes welding slag;
S5, heating and soaking: the solder side of carbide chip is placed on the solder side of parent steel part, adopt high-frequency induction slowly to heat bottom parent steel part, and temperature is controlled at 300 DEG C, soaking, when solder starts fusing and can flow freely, stop heating, when solder flowing is not smooth, continue heating, so 2 times repeatedly, in this process, changing of the relative positions carbide chip, carbide chip is welded on parent steel part the most at last;
S6, slow cooling: in the holding furnace of 150 DEG C, be cooled to normal temperature with stove;
S7, scarfing cinder: after Wetted constructures, remove welding slag, checks without after rosin joint, obtain product.
[embodiment 2]:
A kind of employing low temperature brazing welding steel part and hard alloy cutter method, is characterized in that: it comprises the following steps:
S1, pre-treatment: carbide chip is carried out blasting treatment, then carry out cleaning and degreasing process respectively by parent steel part, carbide chip and solder;
S2, soldering copper: brazing flux is heated to be cooked into pasty state, again brazing flux is applied to the surface of parent steel part, solder, copper sheet and carbide chip, and solder is added between parent steel part and copper sheet, the copper of one deck 0.4mm thickness is welded at the face of weld of parent steel part, similarly, the copper of one deck 0.35mm thickness is welded at the face of weld of carbide chip;
S3, welded after, immediately parent steel part and carbide chip are placed in the holding furnace of 290 DEG C and are incubated after 6.5 hours, slow cooling, slow cooling is specially cooling per hour and is no more than 30 DEG C, when temperature drops to 125 DEG C, then close holding furnace after being incubated 11h, be cooled to normal temperature with stove;
The surface of S4, milling brazing: will be welded with the parent steel part of copper and carbide chip respectively at the copper of milling machine mill off 0.09mm, the surface planarity after milling ensures between 0 ~ 0.03mm, removes welding slag;
S5, heating and soaking: the solder side of carbide chip is placed on the solder side of parent steel part, adopt high-frequency induction slowly to heat bottom parent steel part, and temperature is controlled between 280 DEG C, soaking, when solder starts fusing and can flow freely, stop heating, when solder flowing is not smooth, continue heating, so 4 times repeatedly, in this process, changing of the relative positions carbide chip, carbide chip is welded on parent steel part the most at last;
S6, slow cooling: in the holding furnace of 130 DEG C, be cooled to normal temperature with stove;
S7, scarfing cinder: after Wetted constructures, remove welding slag, checks without after rosin joint, obtain product.
[embodiment 3]:
A kind of employing low temperature brazing welding steel part and hard alloy cutter method, is characterized in that: it comprises the following steps:
S1, pre-treatment: carbide chip is carried out blasting treatment, then carry out cleaning and degreasing process respectively by parent steel part, carbide chip and solder;
S2, soldering copper: brazing flux is heated to be cooked into pasty state, again brazing flux is applied to the surface of parent steel part, solder, copper sheet and carbide chip, and solder is added between parent steel part and copper sheet, the copper of one deck 0.5mm thickness is welded at the face of weld of parent steel part, similarly, the copper of one deck 0.5mm thickness is also welded at the face of weld of carbide chip;
S3, welded after, immediately parent steel part and carbide chip are placed in the holding furnace of 300 DEG C and are incubated after 7 hours, slow cooling, slow cooling is specially cooling per hour and is no more than 30 DEG C, when temperature drops to 150 DEG C, then close holding furnace after being incubated 10h, be cooled to normal temperature with stove;
The surface of S4, milling brazing: will be welded with the parent steel part of copper and carbide chip respectively at the copper of milling machine mill off 0.08mm, the surface planarity after milling ensures between 0 ~ 0.03mm, removes welding slag;
S5, heating and soaking: the solder side of carbide chip is placed on the solder side of parent steel part, adopt high-frequency induction slowly to heat bottom parent steel part, and temperature is controlled between 260 DEG C, soaking, when solder starts fusing and can flow freely, stop heating, when solder flowing is not smooth, continue heating, so 6 times repeatedly, in this process, changing of the relative positions carbide chip, carbide chip is welded on parent steel part the most at last;
S6, slow cooling: in the holding furnace of 100 DEG C, be cooled to normal temperature with stove;
S7, scarfing cinder: after Wetted constructures, remove welding slag, checks without after rosin joint, obtain product.
Claims (3)
1. adopt low temperature brazing welding steel part and a hard alloy cutter method, it is characterized in that: it comprises the following steps:
S1, pre-treatment: carbide chip is carried out blasting treatment, then carry out cleaning and degreasing process respectively by parent steel part, carbide chip and solder;
S2, soldering copper: brazing flux is heated to be cooked into pasty state, again brazing flux is applied to the surface of parent steel part, solder, copper sheet and carbide chip, and solder is added between parent steel part and copper sheet, the copper of one deck 0.25 ~ 0.5mm thickness is welded at the face of weld of parent steel part, similarly, the copper of one deck 0.25 ~ 0.5mm thickness is also welded at the face of weld of carbide chip;
S3, welded after, parent steel part and carbide chip are placed on immediately in the holding furnace of 280 DEG C ~ 300 DEG C and are incubated after 6 ~ 7 hours, slow cooling, when temperature drops to 100 DEG C ~ 150 DEG C, then closes holding furnace after being incubated 10 ~ 12h, is cooled to normal temperature with stove;
The surface of S4, milling brazing: will be welded with the parent steel part of copper and carbide chip respectively at the copper of milling machine mill off 0.08 ~ 0.10mm, the surface planarity after milling ensures between 0 ~ 0.03mm, removes welding slag;
S5, heating and soaking: the solder side of carbide chip is placed on the solder side of parent steel part, bottom slow heating parent steel part, soaking, when solder starts fusing and can flow freely, stops heating, when solder flowing is not smooth, continue heating, 2 ~ 6 times so repeatedly, in this process, changing of the relative positions carbide chip, carbide chip is welded on parent steel part the most at last;
S6, slow cooling: in the holding furnace of 100 DEG C ~ 150 DEG C, be cooled to normal temperature with stove;
S7, scarfing cinder: after Wetted constructures, remove welding slag, checks without after rosin joint, obtain product.
2. the method for a kind of low temperature brazing cutter according to claim 1, it is characterized in that: in step s3, slow cooling is specially cooling per hour and is no more than 30 DEG C.
3. the method for a kind of low temperature brazing cutter according to claim 1, is characterized in that: in step s 5, adopts high-frequency induction heating, and temperature is controlled between 260 DEG C ~ 300 DEG C.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510105914.9A CN104668686B (en) | 2015-03-11 | 2015-03-11 | A kind of employing low temperature brazing weldable steel part and inserted tool method |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510105914.9A CN104668686B (en) | 2015-03-11 | 2015-03-11 | A kind of employing low temperature brazing weldable steel part and inserted tool method |
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| Publication Number | Publication Date |
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| CN104668686A true CN104668686A (en) | 2015-06-03 |
| CN104668686B CN104668686B (en) | 2016-06-01 |
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| CN201510105914.9A Active CN104668686B (en) | 2015-03-11 | 2015-03-11 | A kind of employing low temperature brazing weldable steel part and inserted tool method |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109807576A (en) * | 2019-04-04 | 2019-05-28 | 上海永桦合金工具有限公司 | The processing technology of outer chamfer push-pull knife in a kind of bonding is golden |
| CN110216343A (en) * | 2019-07-17 | 2019-09-10 | 无锡市宝赛德机械制造有限公司 | The production technology of carbide bit |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3909917A (en) * | 1973-08-09 | 1975-10-07 | Viktor Fedorovich Lebedev | Method of brazing refractory metals and compounds based thereon |
| JPS5230755A (en) * | 1975-09-05 | 1977-03-08 | Hitachi Cable | Method to manufacture composite metal tubes |
| CN1428222A (en) * | 2001-12-27 | 2003-07-09 | 西北有色金属研究院 | Welding method of hard alloy cutting tool |
| JP2010052015A (en) * | 2008-08-28 | 2010-03-11 | Nhk Spring Co Ltd | Method for producing different material-joined body and different material-joined body by the method |
| CN103071878A (en) * | 2013-01-11 | 2013-05-01 | 中国矿业大学 | Braze welding method for hard alloy and low-alloy and high-strength steel |
| CN103100834A (en) * | 2013-01-28 | 2013-05-15 | 哈尔滨工业大学 | Manufacturing method for hard alloy steel compound tool |
-
2015
- 2015-03-11 CN CN201510105914.9A patent/CN104668686B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3909917A (en) * | 1973-08-09 | 1975-10-07 | Viktor Fedorovich Lebedev | Method of brazing refractory metals and compounds based thereon |
| JPS5230755A (en) * | 1975-09-05 | 1977-03-08 | Hitachi Cable | Method to manufacture composite metal tubes |
| CN1428222A (en) * | 2001-12-27 | 2003-07-09 | 西北有色金属研究院 | Welding method of hard alloy cutting tool |
| JP2010052015A (en) * | 2008-08-28 | 2010-03-11 | Nhk Spring Co Ltd | Method for producing different material-joined body and different material-joined body by the method |
| CN103071878A (en) * | 2013-01-11 | 2013-05-01 | 中国矿业大学 | Braze welding method for hard alloy and low-alloy and high-strength steel |
| CN103100834A (en) * | 2013-01-28 | 2013-05-15 | 哈尔滨工业大学 | Manufacturing method for hard alloy steel compound tool |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109807576A (en) * | 2019-04-04 | 2019-05-28 | 上海永桦合金工具有限公司 | The processing technology of outer chamfer push-pull knife in a kind of bonding is golden |
| CN110216343A (en) * | 2019-07-17 | 2019-09-10 | 无锡市宝赛德机械制造有限公司 | The production technology of carbide bit |
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| CN104668686B (en) | 2016-06-01 |
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Address after: 610000, No. 96, South Road, Chengdu economic and Technological Development Zone (Longquanyi District, Sichuan) Patentee after: Chengdu Great Wall cutting tools Co., Ltd Address before: 610000, No. 96, South Road, Chengdu economic and Technological Development Zone (Longquanyi District, Sichuan) Patentee before: CHENGDU GERUN HI-TECH MATERIALS Co.,Ltd. |