CN100441352C - Brazing method of products containing stainless steel parts - Google Patents
Brazing method of products containing stainless steel parts Download PDFInfo
- Publication number
- CN100441352C CN100441352C CNB2005100544389A CN200510054438A CN100441352C CN 100441352 C CN100441352 C CN 100441352C CN B2005100544389 A CNB2005100544389 A CN B2005100544389A CN 200510054438 A CN200510054438 A CN 200510054438A CN 100441352 C CN100441352 C CN 100441352C
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- China
- Prior art keywords
- atmosphere
- stainless steel
- steel parts
- heating
- product
- 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.)
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Classifications
-
- 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
- B23K1/008—Soldering within a furnace
-
- 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
- B23K3/00—Tools, devices, or special appurtenances for soldering, e.g. brazing, or unsoldering, not specially adapted for particular methods
- B23K3/08—Auxiliary devices therefor
-
- 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
- B23K31/00—Processes relevant to this subclass, specially adapted for particular articles or purposes, but not covered by only one of the preceding main groups
- B23K31/02—Processes relevant to this subclass, specially adapted for particular articles or purposes, but not covered by only one of the preceding main groups relating to soldering or welding
-
- 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
- B23K2103/00—Materials to be soldered, welded or cut
- B23K2103/02—Iron or ferrous alloys
- B23K2103/04—Steel or steel alloys
- B23K2103/05—Stainless steel
Abstract
Provided is a method for continuously brazing products containing stainless steel part in an atmosphere, which easily and safely achieves brazing in a wide range of low temperatures to high temperatures in one continuous furnace, while keeping the stainless steel part in a reducing atmosphere. The continuous furnace comprises a heating chamber for brazing at the center of the furnace, and chambers positioned at the front and rear of the heating chamber, which extend downward like a skirt and are filled with an inert gas. The heating chamber is composed of a graphite muffle. When brazing the products at a relatively low temperature, a good deal of hydrogen is added to the atmosphere in the graphite muffle. When brazing the products at a relatively high temperature, no or only a little hydrogen is added to the atmosphere in the graphite muffle.
Description
Technical field
The present invention relates to metal product, the particularly local method for welding that comprises the metal product of stainless steel parts, this method is sent this product into soldering oven continuously by conveyer and is heated to predetermined brazing temperature then.
Background technology
It is important carrying out soldering and oxidation does not take place, and in other words, under reducing atmosphere for example stainless metal product is carried out soldering.For this reason, at the hydrogen of 100 percents by volume, carry out soldering under the atmosphere of reducibility gas and low oxygen dividing potential drop as everyone knows.Show the oxygen partial pressure under the OR balance in the balance chart of Fig. 3, and when under low relatively temperature, stainless steel being carried out soldering, can use hydrogen.
Because the hydrogen of 4 percents by volume reaches explosion limit in air, therefore must careful operation.For this reason, suggestion for example adds in nitrogen or the argon gas less than the hydrogen of 4 percents by volume and makes it as furnace atmosphere to inert gas.Its advantage is the danger that does not have blast, and is particularly in the nitrogen situation, cheap and economical, yet, when when containing stainless product and carry out soldering, be difficult to make this metal product to be in reducing condition or with they reduction.
It is reported, in graphite muffle heated inert gas for example nitrogen can produce the atmosphere (Japan Patent discloses clear 60-190514) that comprises reducibility gas CO, and can use this nitrogen+CO atmosphere to be used for the soldering stainless steel by keeping reducing atmosphere.Shown in the balance chart of Fig. 3, very low at the OR equilibrium partial pressure that is higher than this nitrogen+CO gas under 800 ℃ the temperature.In other words, when near 800 ℃ and preferably when more than 800 ℃ stainless steel being carried out soldering, can use this nitrogen+CO gas certainly as reducibility gas.
Summary of the invention
Problem of the present invention is: when in atmosphere the product that contains stainless steel parts being carried out continuous braze welding, different brazing temperature differences because of the solder type used, in wide temperature range, under reducing condition and use same stove, easy and economical, and under the danger that does not have the atmosphere gas burst, this product is carried out soldering.
For reaching this purpose, the heating soldering chamber of continuous atmosphere soldering oven is set in the extreme higher position, cup and chamber, back are set to entrance and exit, these chambers are lower than this heating soldering chamber, the atmosphere that makes these chambers is inert gas, constitute this heating soldering chamber with graphite muffle, and carry out in the atmosphere of this graphite muffle, adding under the situation of soldering the hydrogen of certain volume in low relatively temperature, carry out in high relatively temperature in this atmosphere, not adding hydrogen or only adding small quantity of hydrogen under the situation of soldering.
By the present invention, can be in wide temperature range by changing the atmosphere of heating soldering chamber, use single continuous braze welding stove easy and realize safely under reductive condition to comprising the soldering of stainless product.
Fig. 1 has shown the example of the suitable continous way soldering oven that carries out method of the present invention.The indicated continous way soldering oven of mark 1 is by forming with the lower part: the heating clamber 3 of extreme higher position, cup 4, the first cooling chambers, 5, the second cooling chambers 6 and chamber 7, back place the position that is lower than heating clamber with all these chambers and reduce to two ends gradually.In other words, heating clamber 3 is mountain tops and other chamber is on the slope that reduces gradually to two ends.
Grid type belt conveyer 2 cycle operation in stove, thus metal product transmitted in order and continuously.Mark 8 has been pointed out operation control panel.
The sectional view that has shown heating clamber 3 among Fig. 2.The inwall of soldering furnace shell 10 is covered with heat-insulating material 11, and is stretched into the center of cross section square space along major axis by the Muffle furnace 9 that graphite is made.Heater 12 is installed in upper and lower in Muffle furnace 9 outsides, and grid type belt conveyer 2 is installed so that turn round at long axis direction at the lower position of Muffle furnace 9 inside.The atmosphere gas inlet tube that does not show heating clamber 3 and chamber 4,5,6 and 7 among Fig. 1 and Fig. 2.
Use continuous braze welding stove illustrated in figures 1 and 2 according to the described enforcement of embodiment 1-3 method of the present invention.
Description of drawings
Fig. 1 is the schematic section that is suitable for carrying out the continuous braze welding stove of method of the present invention.
Fig. 2 is the viewgraph of cross-section of the heating clamber of soldering oven shown in Figure 1.
Fig. 3 is in the graphite heating Muffle furnace, with the oxygen partial pressure balance chart under the stainless steel oxidation-reduction balance of hydrogen atmosphere or inert atmosphere contrast.
The specific embodiment
Embodiment 1
Use silver-colored type solder (BAg 7), the end of copper pipe is brazed to the sidewall of the steel pipe that stainless steel makes.Use following soldering condition and obtained fabulous soldering.
Atmosphere in the heating clamber 3: the hydrogen of nitrogen+60 percents by volume
Chamber 4,5, the atmosphere in 6 and 7: nitrogen
Brazing temperature in the heating clamber 3: 740 ℃
Because the steel pipe that the hydrogen rich gas atmosphere in the heating clamber 3 of continuous oven 1 is made stainless steel maintains under the reductive condition shown in the balance chart of Fig. 3, has carried out copper pipe among the embodiment 1 at low temperatures well to stainless soldering.This copper pipe is also no problem in this soldering.
In this embodiment 1, used the hydrogen that surpasses 4 percents by volume, be higher than explosion limit, yet, because the nitrogen (proportion is 0.977) in the chamber 4,5,6 and 7, the feasible atmosphere hydrogen (is 0.069 with respect to air specific weight 1 its proportion) and soldering oven inlet or near the air insulated of outlet that is positioned at the heating clamber of extreme higher position, thus the danger of exploding avoided all the time.
Embodiment 2
Identical copper pipe among the embodiment 1 is brazed to identical stainless steel tube, yet uses the Cu-Mn solder in the present embodiment.Use following soldering condition.
Atmosphere in the heating clamber 3: nitrogen
Chamber 4,5, the atmosphere in 6 and 7: nitrogen
Brazing temperature in the heating clamber 3: 920 ℃
In the present embodiment, use the soldering oven identical and the hydrogen that do not have use to have explosion danger has carried out stainless steel braze welding well under reductive condition with embodiment 1.Nitrogen atmosphere in the graphite muffle 9 of heating clamber 3 is a reproducibility for stainless steel, because under the brazing temperature of 920 ℃ of present embodiments, the oxygen partial pressure of this gas maintains at least less than 10-20, shown in the balance chart of Fig. 3.Can add hydrogen if desired, and preferably be up to its explosion limit 4 percents by volume, perhaps more.
Embodiment 3
Except that using nickel type solder, use identical soldering oven the stainless steel tube of identical component (SUS304) to be brazed to the sidewall of the identical stainless steel tube among the embodiment 1 in the present embodiment.Use following condition in the present embodiment.
Atmosphere in the heating clamber 3: argon gas
Chamber 4,5, the atmosphere in 6 and 7: the nitrogen that is lower than room temperature
Brazing temperature in the heating clamber 3: 1200 ℃
Even it is in the soldering under the high temperature of present embodiment, fine and brilliantly stainless steel product has been carried out soldering.In the present embodiment, the atmosphere of heating clamber obviously is reproducibility for stainless steel, shown in the balance chart of Fig. 3.
Claims (5)
1. contain the heating soldering method of the product of stainless steel parts, it is characterized in that:
A) has the soldering heating clamber that is positioned at the extreme higher position and be lower than this heating clamber and be similar to cup that the hillside reduces to arrival end and the port of export gradually and the continuous furnace of chamber, back;
B) making the Muffle furnace of this heating clamber is graphite;
C) making the atmosphere of graphite muffle is the inert gas that contains 0-99 percent by volume hydrogen;
D) under this atmosphere with the to be brazed and product by heating that contains stainless steel parts to predetermined brazing temperature, wherein this product transmits on conveyer continuously; With
E) making the atmosphere of above-mentioned cup and chamber, back is inert gas.
2. the desired heating soldering method that contains the stainless steel parts product in the claim 1, wherein brazing temperature is lower than the hydrogen that comprises in 800 ℃ and the inert atmosphere in the graphite system Muffle furnace of heating clamber greater than 4 percents by volume.
3. the desired heating soldering method that contains the stainless steel parts product in the claim 1, wherein brazing temperature is lower than in 800 ℃ and the inert atmosphere in the graphite system Muffle furnace of heating clamber and comprises more than or equal to 0 percent by volume to the hydrogen less than 4 percents by volume.
4. the desired heating soldering method that contains the stainless steel parts product in the claim 3, wherein the inert gas atmosphere in the graphite system of the heating clamber Muffle furnace is nitrogen or argon gas, and the inert gas of cup and chamber, back is a nitrogen.
5. the desired heating soldering method that contains the stainless steel parts product in the claim 4, the nitrogen temperature of wherein keeping in cup and the chamber, back is lower than room temperature.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2004068751 | 2004-03-11 | ||
| JP2004068751A JP4569860B2 (en) | 2004-03-11 | 2004-03-11 | Heat brazing method for products containing stainless steel parts |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1830610A CN1830610A (en) | 2006-09-13 |
| CN100441352C true CN100441352C (en) | 2008-12-10 |
Family
ID=35080520
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNB2005100544389A Active CN100441352C (en) | 2004-03-11 | 2005-03-10 | Brazing method of products containing stainless steel parts |
Country Status (3)
| Country | Link |
|---|---|
| JP (1) | JP4569860B2 (en) |
| KR (1) | KR100859177B1 (en) |
| CN (1) | CN100441352C (en) |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP5093441B2 (en) * | 2006-06-22 | 2012-12-12 | 関東冶金工業株式会社 | Heating furnace equipped with a furnace atmosphere gas sealing device |
| CN102837095B (en) * | 2012-09-18 | 2015-05-20 | 三一重工股份有限公司 | Brazing furnace |
| CN113528781B (en) * | 2021-01-25 | 2023-03-31 | 陈学森 | Crawler-type controllable atmosphere brazing heat treatment device |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4455385A (en) * | 1975-06-30 | 1984-06-19 | General Electric Company | Silicon carbide sintered body |
| JPH06238433A (en) * | 1993-02-22 | 1994-08-30 | Kanto Yakin Kogyo Kk | Brazing method |
| JPH06323758A (en) * | 1993-05-13 | 1994-11-25 | Furukawa Electric Co Ltd:The | Controlling method for membrane separation type nitrogen gas supplying apparatus for heating furnace |
| US5531372A (en) * | 1994-08-30 | 1996-07-02 | Air Products And Chemicals, Inc. | Moisture-free atmosphere brazing of ferrous metals |
| CN2531907Y (en) * | 2002-02-01 | 2003-01-22 | 徐中立 | Continuous gas shielded soldering furnace for stainless steel products |
Family Cites Families (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5216662U (en) * | 1975-07-25 | 1977-02-05 | ||
| JPH0339888A (en) * | 1989-07-05 | 1991-02-20 | Kanto Yakin Kogyo Kk | Atmosphere heat treatment method and its device |
| JPH08125099A (en) * | 1994-10-28 | 1996-05-17 | Toshiba Corp | Manufacture of semiconductor device |
| JP2003003211A (en) * | 2001-06-19 | 2003-01-08 | Kanto Yakin Kogyo Co Ltd | Continuous heat-treatment method for metal under argon atmosphere |
-
2004
- 2004-03-11 JP JP2004068751A patent/JP4569860B2/en not_active Expired - Lifetime
-
2005
- 2005-03-04 KR KR1020050018202A patent/KR100859177B1/en active IP Right Grant
- 2005-03-10 CN CNB2005100544389A patent/CN100441352C/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4455385A (en) * | 1975-06-30 | 1984-06-19 | General Electric Company | Silicon carbide sintered body |
| JPH06238433A (en) * | 1993-02-22 | 1994-08-30 | Kanto Yakin Kogyo Kk | Brazing method |
| JPH06323758A (en) * | 1993-05-13 | 1994-11-25 | Furukawa Electric Co Ltd:The | Controlling method for membrane separation type nitrogen gas supplying apparatus for heating furnace |
| US5531372A (en) * | 1994-08-30 | 1996-07-02 | Air Products And Chemicals, Inc. | Moisture-free atmosphere brazing of ferrous metals |
| CN2531907Y (en) * | 2002-02-01 | 2003-01-22 | 徐中立 | Continuous gas shielded soldering furnace for stainless steel products |
Also Published As
| Publication number | Publication date |
|---|---|
| JP4569860B2 (en) | 2010-10-27 |
| JP2005254276A (en) | 2005-09-22 |
| KR20060044294A (en) | 2006-05-16 |
| KR100859177B1 (en) | 2008-09-19 |
| CN1830610A (en) | 2006-09-13 |
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| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant |