CN103949743A - Welding method of ferrous metal - Google Patents
Welding method of ferrous metal Download PDFInfo
- Publication number
- CN103949743A CN103949743A CN201410183866.0A CN201410183866A CN103949743A CN 103949743 A CN103949743 A CN 103949743A CN 201410183866 A CN201410183866 A CN 201410183866A CN 103949743 A CN103949743 A CN 103949743A
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- CN
- China
- Prior art keywords
- ferrous metal
- welding method
- graphite
- inert gas
- solder
- 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
- B23K1/19—Soldering, e.g. brazing, or unsoldering taking account of the properties of the materials to be soldered
-
- 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
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Chemical & Material Sciences (AREA)
- Materials Engineering (AREA)
- Arc Welding In General (AREA)
Abstract
The invention provides a welding method of a ferrous metal. The welding method comprises the following steps: (I) adding a high-molecular polymer plasticizer to a graphite granule material with the carbon content greater than 90%, and stamping into flakes to obtain flake solder; (II) placing the flake solder between ferrous metal pieces to be welded, and then placing the whole body into a high-temperature container into which an inert gas is introduced, continuously introducing the inert gas, and cooling after keeping the heat for a certain period of time. By adopting the welding method disclosed by the invention, ferrous metal (homogeneous and heterogenous) materials can be welded well. Any cleaning and special surface pre-treatment processes are not required to be performed on the welded pieces, the equipment investment is reduced, and the process cost is reduced. Meanwhile, solder graphite is wide in source, so that the cost of the raw materials can also be reduced.
Description
Technical field
The present invention relates to a kind of welding method of metal, particularly the welding method between ferrous metal.
Background technology
In metal industry field, conventionally metal is divided into ferrous metal class and non-ferrous metal class at present, ferrous metal mainly refers to iron, manganese, chromium and alloy thereof, as steel, the pig iron, ferroalloy, cast iron etc.The composite of ferrous metal is because function admirable is widely used, soldering is to realize the important method of preparing ferrous metal composite, what generally adopt at present has reducing atmosphere and vacuum copper brazing technique, due between ferrous metal when the soldering interface be difficult to stable fusion, exist soldered fitting intensity low, difficulty meets the needs of actual condition, need a large amount of equipment investments and expensive removing surface cost exactly and cause production cost very high, and product size is also subject to the size restrictions of vacuum brazing stove.
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Summary of the invention
The present invention aims to provide a kind of effective welding realizing between ferrous metal, improves strength of joint and effectively reduces the method for soldering processes cost.The present invention realizes by following scheme:
A kind of ferrous metal welding method, comprises the following steps:
The graphite raw material that (I) is greater than 90% by carbon content, through pulverizing---after classification, in graphite granule, add high molecular polymer binder, afterwards through granulating---strike out again sheet, make sheet solder;
(II) is placed in ferrous metal by above-mentioned sheet solder and treats between weldment, and then overall being positioned in the elevated temperature vessel that passes into inert gas, continues to pass into inert gas, and is incubated after certain hour under uniform temperature condition, cooling; Described uniform temperature condition refers between the melting temperature of graphite and the lower melting point metal temperature for the treatment of weldment of melting temperature, treat that the temperature of weldment in inert gas container should be: higher than the melting point values of graphite solder, lower than the fusing point for the treatment of weldment ferrous metal, if treat, weldment is two kinds of ferrous metal that melting point values is different, and vacuum heat-preserving temperature should be lower than the lower value of melting temperature; Described inert gas is selected from one or more mixing in following gas: nitrogen, rare element gas, and rare element gas refers to the element simple substance gas of the 18th family in chemical periodic table, as: helium, xenon, radon gas etc.
Although said process is in the container of inert gas, but graphite still inevitably has a small amount of oxidation and therefore brings adverse effect to welding effect, for overcoming this deficiency, preferably 100 ~ 200 μ m of average grain diameter of the graphite granule after described I step is pulverized.
The described preferred paraffin wax of high molecular polymer binder is or/and rubber, to reduce costs.
Preferably 0.05 ~ 0.1mm of the thickness of described sheet solder.
Compared with prior art, the present invention has the following advantages:
1. welding method of the present invention, do not need welded part to do the technique of any cleaning and special surface pre-treatment, even for being required all very low by the smooth degree of the face of weld, therefore not only optimized processing step, and can save the equipment investment for making cleaning and surface pretreatment, reduce process costs.
2. the source of the graphite raw material adopting in the present invention is very extensive, except native graphite, processing graphite goods etc., can also directly adopt the waste material of all kinds of graphite products or granular graphite.All kinds of metal solders that adopt in more existing soldering processes, cost of material also can reduce.
3. can realize black is belonged between (of the same race, xenogenesis) material and realizes good welding, almost there is no weld seam, it is firm to weld;
Detailed description of the invention
embodiment 1
Carbon content is reached more than 99% native graphite by (I), adopts mechanical ball grinding method to grind, then through screening---classification, being averaged particle diameter is 100～120
μ mgraphite powder, then add binder in graphite powder---rubber, then be the sheet of 0.05 millimeter through granulating, struck out thickness on punch press, flake graphite solder obtained.
The flake graphite solder making is placed in carbon steel by (II)---between the welded part of cast iron, formation is similar to " sandwich " shape, and then entirety is positioned in the high temperature furnace that passes into helium, continue to pass into helium, be heated to 1100 DEG C, insulation more than 3 hours, is come out of the stove after cooling, can realize the good welds of two materials.Material after welding adopts ultrasonic examination inspection, finds no weld defectiveness point, and after tested, more than plumb joint intensity can reach 350MPa.
embodiment 2
Adopt method substantially the same manner as Example 1 to carry out soldering stainless steel---rich chromium cast iron, below parameter have difference: adopt the graphite product waste material of carbon content more than 90% to make raw material, the average grain diameter of the graphite powder after grinding is 150～200 μ m; The thickness of flake graphite solder is 0.085mm; Insulation is more than 10 hours.
Claims (5)
1. the welding method of a ferrous metal, it is characterized in that: comprise the following steps the graphite raw material that (I) is greater than 90% by carbon content, through pulverizing---after classification, in graphite granule, add high molecular polymer binder, afterwards through granulating---strike out again sheet, make sheet solder; (II) is placed in ferrous metal by above-mentioned sheet solder and treats between weldment, and then overall being positioned in the elevated temperature vessel that passes into inert gas, continues to pass into inert gas, and is incubated after certain hour under uniform temperature condition, cooling; Described uniform temperature condition refers between the melting temperature of graphite and the lower melting point metal temperature for the treatment of weldment of melting temperature; Described inert gas is selected from one or more mixing in following gas: nitrogen, rare element gas.
2. the welding method of a kind of ferrous metal as claimed in claim 1, is characterized in that: preferably 100 ~ 200 μ m of average grain diameter of the graphite granule after described I step is pulverized.
3. the welding method of a kind of ferrous metal as claimed in claim 1 or 2, is characterized in that: the described preferred paraffin wax of high molecular polymer binder is or/and rubber.
4. the welding method of a kind of ferrous metal as claimed in claim 1 or 2, is characterized in that: preferably 0.05 ~ 0.1mm of the thickness of described sheet solder.
5. the welding method of a kind of ferrous metal as claimed in claim 3, is characterized in that: preferably 0.05 ~ 0.1mm of the thickness of described sheet solder.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410183866.0A CN103949743B (en) | 2014-05-04 | 2014-05-04 | A kind of welding method of ferrous metal |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410183866.0A CN103949743B (en) | 2014-05-04 | 2014-05-04 | A kind of welding method of ferrous metal |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN103949743A true CN103949743A (en) | 2014-07-30 |
| CN103949743B CN103949743B (en) | 2016-01-20 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201410183866.0A Active CN103949743B (en) | 2014-05-04 | 2014-05-04 | A kind of welding method of ferrous metal |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN103949743B (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105330317A (en) * | 2015-12-14 | 2016-02-17 | 福建闽航电子有限公司 | Ceramic shell brazing method |
| CN105355583A (en) * | 2015-12-14 | 2016-02-24 | 福建闽航电子有限公司 | Graphite boat for CPGA product assembly |
| CN115556436A (en) * | 2022-12-07 | 2023-01-03 | 长沙威尔保新材料有限公司 | Preparation method of multilayer alloy wear-resistant composite material |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB173486A (en) * | 1920-12-24 | 1922-08-24 | Soudure Autogene Francaise | Improvements in or relating to the electrical welding of cast iron |
| GB368605A (en) * | 1930-07-03 | 1932-03-10 | Linde Air Prod Co | Welding process |
| JPH067970A (en) * | 1992-06-02 | 1994-01-18 | Sumitomo Metal Ind Ltd | Hot joining method for steel |
| EP1987902A1 (en) * | 2007-04-30 | 2008-11-05 | United Technologies Corporation | Brazing process incorporating graphitic preforms |
| WO2014008537A1 (en) * | 2012-07-09 | 2014-01-16 | Hugget Paul | Brazing method and composites produced thereby |
-
2014
- 2014-05-04 CN CN201410183866.0A patent/CN103949743B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB173486A (en) * | 1920-12-24 | 1922-08-24 | Soudure Autogene Francaise | Improvements in or relating to the electrical welding of cast iron |
| GB368605A (en) * | 1930-07-03 | 1932-03-10 | Linde Air Prod Co | Welding process |
| JPH067970A (en) * | 1992-06-02 | 1994-01-18 | Sumitomo Metal Ind Ltd | Hot joining method for steel |
| EP1987902A1 (en) * | 2007-04-30 | 2008-11-05 | United Technologies Corporation | Brazing process incorporating graphitic preforms |
| WO2014008537A1 (en) * | 2012-07-09 | 2014-01-16 | Hugget Paul | Brazing method and composites produced thereby |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105330317A (en) * | 2015-12-14 | 2016-02-17 | 福建闽航电子有限公司 | Ceramic shell brazing method |
| CN105355583A (en) * | 2015-12-14 | 2016-02-24 | 福建闽航电子有限公司 | Graphite boat for CPGA product assembly |
| CN105330317B (en) * | 2015-12-14 | 2017-12-19 | 福建闽航电子有限公司 | A kind of ceramic package method for welding |
| CN105355583B (en) * | 2015-12-14 | 2018-04-13 | 福建闽航电子有限公司 | A kind of graphite boat for CPGA Product Assemblies |
| CN115556436A (en) * | 2022-12-07 | 2023-01-03 | 长沙威尔保新材料有限公司 | Preparation method of multilayer alloy wear-resistant composite material |
Also Published As
| Publication number | Publication date |
|---|---|
| CN103949743B (en) | 2016-01-20 |
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