CN102296264B - Thermal spraying ceramic soft wire - Google Patents
Thermal spraying ceramic soft wire Download PDFInfo
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- CN102296264B CN102296264B CN2011101810500A CN201110181050A CN102296264B CN 102296264 B CN102296264 B CN 102296264B CN 2011101810500 A CN2011101810500 A CN 2011101810500A CN 201110181050 A CN201110181050 A CN 201110181050A CN 102296264 B CN102296264 B CN 102296264B
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- spraying
- flexible cord
- ceramic
- soft wire
- coating
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Abstract
A thermal spraying ceramic soft wire comprises chemical components of 85-98 wt% of Al2O3, 0.5-10 wt% of TiO2 and 1.5-5 wt% of La2O3 and is prepared by mixing the above chemical components with an organic plasticizer. By the adoption of a ceramic soft wire production device, the ceramic soft wire with its external diameter being F4-6 is extruded and the spraying distance is controlled between 80mm to 120mm when in use. The invention has the following advantages: the cost is low; the bonding strength between a spraying coating and a mild steel matrix is great and reaches 22-28MPa; the soft wire is used within a certain spraying distance range; the porosity is low and only reaches 3-7%; and the spraying coating has high hardness of 900-1200HV, high wear resistance and a coating thickness of 0.1-0.2mm.
Description
Technical fieldThe present invention relates to a kind of hot-spraying techniques, particularly ceramic flexible cord hot-spraying techniques.
Background technologyThermospray is class methods of preparation coating, has become material surface protection and one of new technology of strengthening, and it is to utilize thermal source with spray material heat fused or softening, is ejected into matrix surface with certain speed, forms coating.Its matrix almost can be various materials; Comprise organic materialss such as inorganic materials such as metal, pottery, glass and plastics, timber, paper, cloth; And do not limit workpiece size, and arrive iron tower, bridge greatly, all can adopt thermospray to prepare coating for a short time to mechanical component.Spray material can be a metallic substance, also can be ceramic and Ceramic-to-Metal matrix materials such as pottery.
Ceramic thermal spray is meant with the pottery to be the heat spraying method of spray material; It is on the basis of metallic substance thermospray, to grow up; Because ceramic coating has the incomparable excellent properties of many metallic substance, so development has been brought into play more and more important effect rapidly in a lot of fields.
The flexible cord spraying method is earlier starting powder or powdered mixture to be mixed with organic softening agent, is shaped to flexible cord then, a kind of novel flame spraying method that utilizes special-purpose oxy-acetylene silk material spray gun to spray.In spraying process, the volatilization of organic softening agent does not change the chemical ingredients of spraying material.The major advantage of this method has: can adopt the multiple material (like pottery, self-fluxing alloy, sintering metal etc.) and the powder of random shape to process flexible cord, this is actually can process flexible cord with the powder that any method makes and spray; Simultaneously, can guarantee that spray material stably supplies with in the atomizing zone, and the speed of in very wide scope, regulating wire rod, so the utilization ratio of material high (can reach 96%), productivity is also high, also has the advantages such as whole robotizations that realize spraying process easily.Thereby be a kind of spraying method with application prospect.
The thermospray of pottery flexible cord is that ceramic powder is processed flexible cord through technologies such as batch mixing, extruding, sintering, adopts special lance ejection to matrix surface.The characteristics of pottery flexible cord thermospray are: 1, compare with powder spraying, fundamentally overcome the shortcoming that powder spraying (oxy-acetylene and plasma) exists.Powder spraying sprays to and causes half-cookedly on the matrix because powder feeding is inhomogeneous, unstable, and the fusing degree is inhomogeneous, and anchoring strength of coating is low, and the heat energy utilization rate is low, and sedimentation effect is low, and void content is high.The flexible cord spraying is without powder feeding, so the quality of coating improves greatly, level of aggregation can reach medium plasma-coated level.2, compare with the spraying of solid wire material, the solid wire material needs melting and rolling, and ME is complicated, and composition is changeless.And flexible cord can be according to the coating performance requirement, adjustment flexible cord inner core composition, and also ME is simple.3, compare with the ceramic rod spraying, flexible cord can be as required, and that does is very long, is easy to realize long time continuous working, realizes robotization.And the spraying of employing ceramic rod needs often to change ceramic rod, and inefficiency is difficult to realize robotization, and influences coating quality owing to ceramic rod does not have the tip of fusing to be sprayed onto coatingsurface, and waste is big.
At present, just have ceramic flexible cord hot-spraying techniques, but, limited the widespread use of ceramic flexible cord hot-spraying techniques because the bonding strength between ceramic coating and the matrix is lower in the US and European few countries.
Summary of the inventionThe object of the present invention is to provide the thermospray pottery flexible cord that a kind of cost is low, bonding strength is high.The present invention mainly is to be main coated material with alchlor, is the thermospray pottery flexible cord of subsidiary material with titanium oxide and lanthanum sesquioxide.
Ceramic flexible cord of the present invention, its chemical ingredients (wt%) is: Al
2O
385-98, TiO
20.5-10,
La
2O
31.5-5 any organic softening agent of adding 10-20wt% mixes in above-mentioned raw materials, adopts ceramic flexible cord production unit, through squeezing out the ceramic flexible cord that external diameter is F4-F6.Spray distance is controlled between the 80-120mm during use.
The higher Al of the present invention's pottery flexible cord control
2O
3Content generates Al after spraying
2O
3Top coat, guarantee that deposited metal has higher hardness, play high temperature resistant, anti-oxidant, corrosion-resistant, the effect of resistance to wearing; Add TiO
2Can increase Al
2O
3The compactness of coating and toughness reduce porosity; Add a spot of La
2O
3, strengthened Al
2O
3, TiO
2And the bonding force between the low carbon steel substrate.
The present invention compared with prior art has following advantage: cost is low, has bigger bonding strength between spray-on coating and the low carbon steel substrate and reaches 22-28MPa, in certain spray distance scope; Porosity is lower; Be merely 3-7%, spray-on coating has higher hardness, reaches 900-1200HV; And have higher wear resistance, coat-thickness is 0.1-0.2mm.Compare with the ceramic flexible cord that Russia produces, its bonding strength improves nearly 1 times.
Embodiment
Embodiment 1:
Get Al
2O
398kg, TiO
20.5 kg, La
2O
31.5 kg mixes with the organic softening agent of 10kg DOP (DOP), adopts ceramic flexible cord production unit, through squeezing out the ceramic flexible cord that external diameter is F6.Spray distance is controlled at 120mm during use.The spray-on coating of this pottery flexible cord and the bonding strength between the low carbon steel substrate are 22MPa, and porosity is 7%, and spray-on coating hardness is 1200HV.
Embodiment 2:
Get Al
2O
392 kg, TiO
25 kg, La
2O
33 kg mix with the organic softening agent of 15kg Witcizer 300 (DBP), adopt ceramic flexible cord production unit, through squeezing out the ceramic flexible cord that external diameter is F5.Spray distance is controlled at 100mm during use.The spray-on coating of this pottery flexible cord and the bonding strength between the low carbon steel substrate are 25MPa, and porosity is 5%, and spray-on coating hardness is 1000HV.
Embodiment 3:
Get Al
2O
385 kg, TiO
210 kg, La
2O
35 kg, mix with the organic softening agent of 20kg Octyl adipate (DOA), adopt ceramic flexible cord production unit, through squeezing out the ceramic flexible cord that external diameter is F4.Spray distance is controlled at 80mm during use.The spray-on coating of this pottery flexible cord and the bonding strength between the low carbon steel substrate are 28MPa, and porosity is 3%, and spray-on coating hardness is 800HV.
Claims (2)
1. thermospray pottery flexible cord, it is characterized in that: the weight percent of its chemical ingredients is wt%:Al
2O
385-98, TiO
20.5-10, La
2O
31.5-5; Any organic softening agent that adds above-mentioned raw materials total amount 10-20wt% again.
2. aforesaid right requires the method for use of 1 described thermospray pottery flexible cord, and it is characterized in that: spray distance is controlled between the 80-120mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011101810500A CN102296264B (en) | 2011-06-30 | 2011-06-30 | Thermal spraying ceramic soft wire |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011101810500A CN102296264B (en) | 2011-06-30 | 2011-06-30 | Thermal spraying ceramic soft wire |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN102296264A CN102296264A (en) | 2011-12-28 |
| CN102296264B true CN102296264B (en) | 2012-12-26 |
Family
ID=45356938
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2011101810500A Expired - Fee Related CN102296264B (en) | 2011-06-30 | 2011-06-30 | Thermal spraying ceramic soft wire |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN102296264B (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP3357595B1 (en) * | 2015-09-28 | 2021-05-19 | Nippon Steel Corporation | Plug and method for manufacturing same |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101280405A (en) * | 2008-04-30 | 2008-10-08 | 中国科学院上海硅酸盐研究所 | Lanthanum oxide-aluminum oxide composite coating prepared by plasma spraying method |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2007056357A (en) * | 2005-08-24 | 2007-03-08 | Toshio Hagiwara | Thermally sprayed substrate having improved adhesion, and method for producing the same |
-
2011
- 2011-06-30 CN CN2011101810500A patent/CN102296264B/en not_active Expired - Fee Related
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101280405A (en) * | 2008-04-30 | 2008-10-08 | 中国科学院上海硅酸盐研究所 | Lanthanum oxide-aluminum oxide composite coating prepared by plasma spraying method |
Non-Patent Citations (2)
| Title |
|---|
| JP特开2007-56357A 2007.03.08 |
| 颜建辉等.氧化镧掺杂对等离子喷涂Al2O3-40％TiO2涂层组织和耐磨性能的影响.《润滑与密封》.2008,第33卷(第4期),第81-84页. * |
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| Publication number | Publication date |
|---|---|
| CN102296264A (en) | 2011-12-28 |
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