CN107775211B - Flux-cored wire for wear-resistant hard-face surfacing - Google Patents
Flux-cored wire for wear-resistant hard-face surfacing Download PDFInfo
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- CN107775211B CN107775211B CN201710777135.2A CN201710777135A CN107775211B CN 107775211 B CN107775211 B CN 107775211B CN 201710777135 A CN201710777135 A CN 201710777135A CN 107775211 B CN107775211 B CN 107775211B
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- Prior art keywords
- flux
- wear
- cored wire
- hard
- layer
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- 229910052782 aluminium Inorganic materials 0.000 claims abstract description 5
- 229910052799 carbon Inorganic materials 0.000 claims abstract description 5
- 229910052804 chromium Inorganic materials 0.000 claims abstract description 5
- 229910052742 iron Inorganic materials 0.000 claims abstract description 5
- 229910052748 manganese Inorganic materials 0.000 claims abstract description 5
- 229910052750 molybdenum Inorganic materials 0.000 claims abstract description 5
- 229910052758 niobium Inorganic materials 0.000 claims abstract description 5
- 229910052710 silicon Inorganic materials 0.000 claims abstract description 5
- 229910052719 titanium Inorganic materials 0.000 claims abstract description 5
- 229910045601 alloy Inorganic materials 0.000 claims description 9
- 239000000956 alloy Substances 0.000 claims description 9
- 238000003466 welding Methods 0.000 claims description 6
- 238000005552 hardfacing Methods 0.000 claims description 4
- 239000010410 layer Substances 0.000 abstract description 24
- 239000002344 surface layer Substances 0.000 abstract description 18
- 238000000034 method Methods 0.000 abstract description 5
- 238000004519 manufacturing process Methods 0.000 abstract description 3
- 239000007769 metal material Substances 0.000 abstract description 2
- 230000000052 comparative effect Effects 0.000 description 5
- 239000000463 material Substances 0.000 description 4
- 238000010998 test method Methods 0.000 description 3
- 229910000831 Steel Inorganic materials 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000003825 pressing Methods 0.000 description 2
- 239000010959 steel Substances 0.000 description 2
- 238000012360 testing method Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000004568 cement Substances 0.000 description 1
- 238000005336 cracking Methods 0.000 description 1
- 229910003460 diamond Inorganic materials 0.000 description 1
- 239000010432 diamond Substances 0.000 description 1
- 238000010790 dilution Methods 0.000 description 1
- 239000012895 dilution Substances 0.000 description 1
- 229910000734 martensite Inorganic materials 0.000 description 1
- 238000002156 mixing Methods 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 239000004482 other powder Substances 0.000 description 1
- 239000000843 powder Substances 0.000 description 1
- 238000005496 tempering Methods 0.000 description 1
Images
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
- B23K35/00—Rods, electrodes, materials, or media, for use in soldering, welding, or cutting
- B23K35/22—Rods, electrodes, materials, or media, for use in soldering, welding, or cutting characterised by the composition or nature of the material
- B23K35/24—Selection of soldering or welding materials proper
- B23K35/30—Selection of soldering or welding materials proper with the principal constituent melting at less than 1550 degrees C
- B23K35/3053—Fe as the principal constituent
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Nonmetallic Welding Materials (AREA)
Abstract
The invention belongs to the technical field of metal materials, and relates to a flux-cored wire for wear-resistant hard surfacing, which comprises the components of C, Si, Mn, Cr, Mo, Al, Nb, Ti and Fe. The method can be used for manufacturing the surfacing plate with the hardness of the outer layer of the hard surface layer higher than that of the inner layer of the hard surface layer, and can effectively prevent the problem that the plate is easy to crack due to the inversion of hardness gradient.
Description
Technical Field
The invention relates to the technical field of metal materials, in particular to a flux-cored wire for wear-resistant hard surfacing.
Background
Flux-cored wires are common materials for hardfacing and are usually prepared by blending steel strips, main component alloy powder and other powder. It is widely applied to various industries such as cement, steel, power plants and the like. Flux-cored wires are various in variety, have different requirements in different fields, and have toughness to a certain extent besides the requirement of wear resistance, which is also an important requirement.
In order to make the overall hard surface layer have a certain degree of toughness, the design of the hard surface layer usually requires that the toughness of the inner layer of the hard surface layer is higher than that of the outer layer of the hard surface layer. Generally, compared with similar materials, the trend of toughness is opposite to the trend of hardness, that is, the hardness of the inner hard face layer is generally desired to be lower than that of the outer hard face layer, so as to avoid the hard face layer of the inner layer from being pulled by the outer hard face layer with higher toughness to be damaged or generate cracks. The hard surface layer having the above hardness gradient design is a hard surface layer having relatively high toughness as a whole.
For the flux-cored wire of the martensite type wear-resistant hard surface surfacing, under certain welding conditions, the influence of welding dilution is limited, and the hardness of the inner layer of the hard surface layer is sometimes higher than that of the outer layer of the hard surface layer. In such a case, the inner layer of the hard face layer is susceptible to tearing or cracking by the harder outer hard face layer. In the working condition of actual use, the risk of hard surface peeling and production equipment halt is increased.
The purpose of this patent is to provide a flux-cored wire material that makes the flux-cored wire build-up welding product show that outer hardness is higher than inboard hardness.
Disclosure of Invention
The invention mainly aims to provide a flux-cored wire for wear-resistant hard surfacing.
The invention realizes the purpose through the following technical scheme: a flux-cored wire for wear-resistant hard surfacing comprises the following components in percentage by mass:
specifically, the components by mass percent are as follows: 0.5 wt% C, 1.2 wt% Si, 1.5 wt% Mn, 5.3 wt% Cr, 0.7 wt% Mo, 0.4 wt% Al, 2.5 wt% Nb, 3.9 wt% Ti, 84.0 wt% Fe.
Specifically, the components by mass percent are as follows: 1.3 wt% C, 0.7 wt% Si, 0.4 wt% Mn, 3.8 wt% Cr, 1.5 wt% Mo, 0.9 wt% Al, 5.6 wt% Nb, 2.2 wt% Ti, 83.6 wt% Fe.
By adopting the technical scheme, the technical scheme of the invention has the beneficial effects that:
the method can be used for manufacturing the surfacing plate with the hardness of the outer layer of the hard surface layer higher than that of the inner layer of the hard surface layer, and can effectively prevent the problem that the plate is easy to crack due to the inversion of hardness gradient.
Drawings
FIG. 1 is a graph showing the change in experimental stress of HV-30 in comparative example 1, comparative example 2, example 1 and example 2.
The abscissa-1-0 in the figure represents the hard face inner layer; the abscissa 0 to 1 represents the outer layer of the hard face layer.
Detailed Description
A flux-cored wire for wear-resistant hard surfacing comprises the following components in percentage by mass:
the hardness of the inner layer of the hard surface layer with the new formula is influenced by the heat input during welding the outer layer of the hard surface layer, and the phenomenon of tempering and softening is generated, so that the hardness is lower, and the toughness is improved. The toughness is improved after the inner layer of the hard face layer is moderately softened.
The present invention will be described in further detail with reference to specific examples.
Examples 1 to 4:
flux-cored wires with the diameter of 3mm are prepared according to the composition table of table 1, then a hard surface layer is formed on an alloy plate in a surfacing mode by a conventional surfacing method, and the hardness value of the alloy is obtained by the alloy plate according to a Vickers hardness HV30 test method (a diamond square cone pressing device with the apex angle of 136 degrees is used for pressing the surface of the material under the load of 30 kg).
Comparative example 1:
the alloy plate was subjected to a test according to the Vickers hardness HV30 test method by overlaying a hard coat layer on the alloy plate by a conventional overlaying method using an ST600 type flux-cored wire.
Comparative example 2:
and overlaying a hard surface layer on the alloy plate by using a 258TIC flux-cored wire by using a conventional overlaying method, and testing the obtained alloy plate according to a Vickers hardness HV30 test method.
Table 1:
note: in the table, the portion with the component content less than 100 wt% is Fe.
As can be seen from table 1 and fig. 1, unlike comparative examples 1-2, the hardness of the hard surface layer of the sheets of examples 1-4 is always higher than that of the hard surface layer of the sheets of examples 1-4, and examples 1-4 have good hardness gradients.
What has been described above are merely some embodiments of the present invention. It will be apparent to those skilled in the art that various changes and modifications can be made without departing from the inventive concept thereof, and these changes and modifications can be made without departing from the spirit and scope of the invention.
Claims (3)
1. A flux-cored wire for wear-resistant hardfacing, comprising: the alloy comprises the following components in percentage by mass:
2. the flux-cored welding wire for hardfacing of claim 1, wherein: the components by mass percent are as follows: 0.5 wt% C, 1.2 wt% Si, 1.5 wt% Mn, 5.3 wt% Cr, 0.7 wt% Mo, 0.4 wt% Al, 2.5 wt% Nb, 3.9 wt% Ti, 84.0 wt% Fe.
3. The flux-cored welding wire for hardfacing of claim 1, wherein: the components by mass percent are as follows: 1.3 wt% C, 0.7 wt% Si, 0.4 wt% Mn, 3.8 wt% Cr, 1.5 wt% Mo, 0.9 wt% Al, 5.6 wt% Nb, 2.2 wt% Ti, 83.6 wt% Fe.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710777135.2A CN107775211B (en) | 2017-09-01 | 2017-09-01 | Flux-cored wire for wear-resistant hard-face surfacing |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710777135.2A CN107775211B (en) | 2017-09-01 | 2017-09-01 | Flux-cored wire for wear-resistant hard-face surfacing |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN107775211A CN107775211A (en) | 2018-03-09 |
| CN107775211B true CN107775211B (en) | 2020-04-03 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201710777135.2A Active CN107775211B (en) | 2017-09-01 | 2017-09-01 | Flux-cored wire for wear-resistant hard-face surfacing |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN107775211B (en) |
Family Cites Families (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2516645B2 (en) * | 1987-09-28 | 1996-07-24 | 三菱重工業株式会社 | Composite wire for hardfacing welding |
| JP3891039B2 (en) * | 2002-05-27 | 2007-03-07 | Ｊｆｅスチール株式会社 | High heat input electroslag welding wire |
| CN1289255C (en) * | 2004-08-27 | 2006-12-13 | 攀钢集团攀枝花钢铁研究院 | Flux-cored wire for continuous casting roller surfacing |
| CN1280061C (en) * | 2004-11-15 | 2006-10-18 | 攀钢集团攀枝花钢铁研究院 | Flux-cored wire for backing roll build-up welding |
| CN101190481A (en) * | 2006-11-27 | 2008-06-04 | 攀枝花学院 | Surfacing electrode containing rare earth and production method |
| CN102744528B (en) * | 2011-04-22 | 2014-06-18 | 攀钢集团钢铁钒钛股份有限公司 | Flux-cored wire, method for manufacturing coil box bending roller, and coil box bending roller |
-
2017
- 2017-09-01 CN CN201710777135.2A patent/CN107775211B/en active Active
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| Publication number | Publication date |
|---|---|
| CN107775211A (en) | 2018-03-09 |
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