CN1016710B - Copper alloy powder plasma-arc welding on surface of cast iron powder and method for spray-welding - Google Patents
Copper alloy powder plasma-arc welding on surface of cast iron powder and method for spray-weldingInfo
- Publication number
- CN1016710B CN1016710B CN 86104601 CN86104601A CN1016710B CN 1016710 B CN1016710 B CN 1016710B CN 86104601 CN86104601 CN 86104601 CN 86104601 A CN86104601 A CN 86104601A CN 1016710 B CN1016710 B CN 1016710B
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- welding
- powder
- spray
- alloy powder
- copper
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Abstract
Copper alloy powder plasma-arc welding on surface of cast iron powder and method for spray-welding, the invention reside in provides a kind of new copper alloy powder powder material, to solve wettability problem and the weldability problem between cast iron matrix and the copper alloy, together to finding out the method for an adaptation in arc surfacing process, a certain amount of alloying element such as Zn, Sn, Cr, Mn, Ni etc. are provided in the new cu-based alloy powder material that provides, and non-metallic element P, Si.Facts have proved that the present invention compares with built-up welding or mechanize built-up welding with oxyacetylene torch with traditional plating circle technology, has significant effect.
Description
The present invention relates to metal thermal spraying and welding technique.Particularly at cast iron (especially grey cast iron) matrix surface spray-welding copper alloy powder and method for spray-welding.
As everyone knows, be the low pressure valve of matrix with the grey cast iron, the material of its trim nearly all is to adopt copper alloy.Usually people mainly take methods such as edge circle, oxyacetylene torch manual build up welding or mechanize built-up welding to the process for machining and manufacturing of low pressure valve trim.Facts have proved: these two kinds of processing methodes, all there is different drawbacks separately, one is because edge circle technology is taked " single face dovetail shrink-fit " structure, when causing processing turning, the Cu alloy material consumption is big, and tightness can be also undesirable, shows according to pertinent data, the copper material utilization ratio of edge circle technology has only 20-30%, and the seepage scrap rate that is caused by pressure testing accounts for the 30-38% of waste product sum; It two adopts oxyacetylene torch manual build up welding or mechanize surfacing of Cu alloy prior on cast iron, obviously can enhance productivity, reduce cost, but deadly defect is must carry out high temperature preheating more than 700 ℃ to ironcasting before the built-up welding, and surfacing layer quality is also unstable.Therefore, all trying to explore research on cast iron both at home and abroad at present, adopting the weldability problem of plasma arc spray copper alloy, but all do not tackle the problem at its root.In-problem major cause is: (one) electric arc instability; (2) the mutual warm and humid property of cast iron matrix and copper alloy is very poor; (3) be easy to generate hole and hardened structure in the heap layer.At in the 1984 disclosed patent application GB2130242A of Britain, be entitled as " being used for for example alloy coat of glass mold of cast-iron parts " to declare at cast iron matrix, the nickel-base alloy that adopts the plasma transferred arc spray to have minimum pore belongs to.This shows that before the present invention, also nobody really solves a difficult problem of utilizing copper alloy powder plasma-arc welding on cast iron.
Starting point of the present invention is very clear and definite; be to provide a kind of new copper-base alloy powder; to solve the problem of warm and humid lubricant nature difference between cast iron matrix and the copper alloy; the form of adjustment electric arc and reinforcement are to the protection of copper alloy under the high temperature; seek an adaptation simultaneously and on cast iron, take the processing method of copper alloy powder plasma-arc welding; to replace the technology of oxyacetylene torch manual build up welding or mechanize surfacing of Cu alloy, reach traditional edge circle technology.
In order to realize that effectively above-mentioned purpose, the present invention give one's full attention to and considered protection to LMP such as Zn, Sn alloying element in the copper alloy, and the problem of wettability difference between cast iron matrix and the copper alloy.According to physicochemical reaction under the plasma-arc welding effect, the invention provides the copper-based alloy powder material of several groups of different components, see Table one, table two, table three:
In several groups of new copper-based alloy powder materials that more than provide, add alloying elements such as a certain amount of Si, Cr, Mn, Ni, can form sosoloid and intermetallic compound with copper, can form sosoloid or intermetallic compound with cast iron again, thereby reduced the interfacial tension of copper liquid and cast iron, improved the wettability between copper alloy and the cast iron and the intensity of layer.Simultaneously under the effect of electric arc, P, Mn, Si in copper liquid with copper powder in copper powder in remaining Cu
2Behind the oxide compound generation oxidation-reduction reactions such as O, form one deck composite oxide film, braze layer is played provide protection, and can suppress the scaling loss evaporation of alloying elements such as Zn, Sn effectively, and improved the stability of electric arc on the braze layer surface.The specific embodiment of copper alloy powder plasma-arc welding is: (one) dries copper powder: want the strict drying copper powder before the surfacing, the temperature and time of oven dry should be controlled at 150～200 ℃ * 1h～2h, bake out temperature can not be too big, otherwise the oxidation of copper powder helps forming pore; (2) regulate processing parameter: obtain through refining in the meeting at plasma-arc welding and carry out, regulate and adopt the positive polarity plasma arc surfacing.Its concrete processing parameter sees Table four:
The new copper-base alloy powder and the technology of the present invention's development, in test, obtained the ideal effect, compare with the technology of tradition processing low pressure valve, every performance index of the trim of its surfacing all are better than casting the copper ring trim, and can save copper material more than 60%, the finished product that improves four times of surfacing trims of work efficiency can reach more than 95%.Because processing method of the present invention adopts consing, therefore, the level of automation height, favorable reproducibility, this is that traditional edge circle technology and oxyacetylene torch manual build up welding and mechanize built-up welding are incomparable.
Implementing best method of the present invention is: the residual iron rust of at first eliminating Cast Iron Surface, impurity such as paint, secondly packed in the bronze gold powders end of oven dry in the powder feeder,, enable to obtain best technological effect according to the different weldment adjusting process parameters and the position of spray welding gun.
Table one:
Element Zn Sn P Si Cu
Surplus amount (%) 2～10 2～15 0.05～0.65 0.1～0.8
Table two:
Element Zn Sn P Si Cr Cu
Surplus amount (%) 2～10 2～15 0.05～0.65 0.1～0.8 0.2～1
Table three:
Element Zn Sn P Mn Ni Si Cu
Surplus amount (%) 2～10 2～15 0.05～0.65 2～5 1～10 0.1～0.8
Table four:
Electric current (A) argon gas (n
3/ h) powder sending quantity surfacing speed is put wide wobble frequency spray distance
Commentaries on classics arc non-arc ion gas powder feeding gas (g/min) (rev/min) (mm) (inferior/minute) (mm)
100 40 0.250.4
0.09～ 10～ 65～
/ / // 60～130 10～15
0.59 30 80
300 120 0.30.6
Claims (2)
1, a kind of on cast iron matrix, be that main body is used for the copper alloy powder plasma-arc welding powder with the copper powder, it is characterized in that containing Zn2-10%, Sn2-15%, Mn2-5%, Ni1-10%, Si0.1-0.8%, Cr0.2-1%, P0.05-0.65%.
2, a kind of method for spray-welding that subarc spray-welding copper alloy powder such as is used for, adopt the positive polarity plasma arc surfacing, processing parameters such as electric current, argon gas, powder sending quantity, surfacing speed, pendulum are wide, wobble frequency, spray distance, regulate by supervisory control desk, copper-base alloy powder is dried processing, it is characterized in that, it is 100-300 that electric current (A) changes arc, non-arc is 40-120, argon gas (m
3/ h) ion gas is 0.25-0.3, and powder feeding gas is 0.4-0.60, and powder sending quantity (g/min) is 60-130, surfacing speed (rev/min) be 0.09-0.59, putting wide (mm) is 10-30; Wobble frequency (inferior/minute) be 65-80; Spray is 10-15 apart from (mm), and the temperature and time of copper-base alloy powder oven dry should be controlled at 150-200 ℃ * 1h-2h.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 86104601 CN1016710B (en) | 1986-07-03 | 1986-07-03 | Copper alloy powder plasma-arc welding on surface of cast iron powder and method for spray-welding |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 86104601 CN1016710B (en) | 1986-07-03 | 1986-07-03 | Copper alloy powder plasma-arc welding on surface of cast iron powder and method for spray-welding |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN86104601A CN86104601A (en) | 1988-01-13 |
| CN1016710B true CN1016710B (en) | 1992-05-20 |
Family
ID=4802531
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 86104601 Expired CN1016710B (en) | 1986-07-03 | 1986-07-03 | Copper alloy powder plasma-arc welding on surface of cast iron powder and method for spray-welding |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN1016710B (en) |
Families Citing this family (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102179520A (en) * | 2011-04-08 | 2011-09-14 | 无锡市汉力士液压泵制品有限公司 | Preparation method of nodular cast iron-bronze composite material for cylinder body of plunger pump |
| CN102248358A (en) * | 2011-04-18 | 2011-11-23 | 常熟市建华模具有限责任公司 | Method for filling nickel-based alloy in glass die cavity with cast iron alloy as base matrix |
| CN103056486B (en) * | 2013-01-06 | 2015-02-25 | 昆山众备机械设备有限公司 | Numerical control surfacing process applied to TBM (tunnel boring machine) cutters |
| JP6030186B1 (en) | 2015-05-13 | 2016-11-24 | 株式会社ダイヘン | Copper alloy powder, manufacturing method of layered object, and layered object |
| CN105728922B (en) * | 2016-04-18 | 2018-10-30 | 华能国际电力股份有限公司 | A method of being suitable for boiler tubing plasma spray Co-based alloy powder |
| CN106041050A (en) * | 2016-07-21 | 2016-10-26 | 安徽旭晶粉体新材料科技有限公司 | Antioxidative manganiferous copper alloy powder prepared by water mist method |
| WO2018079304A1 (en) | 2016-10-25 | 2018-05-03 | 株式会社ダイヘン | Copper alloy powder, laminate molding production method, and laminate molding |
| CN107363387A (en) * | 2017-06-22 | 2017-11-21 | 常熟市兄弟玻璃模具有限公司 | A kind of overlaying method of glass mold |
-
1986
- 1986-07-03 CN CN 86104601 patent/CN1016710B/en not_active Expired
Also Published As
| Publication number | Publication date |
|---|---|
| CN86104601A (en) | 1988-01-13 |
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