CN204234978U - A kind of new roller overlay cladding - Google Patents
A kind of new roller overlay cladding Download PDFInfo
- Publication number
- CN204234978U CN204234978U CN201420634520.3U CN201420634520U CN204234978U CN 204234978 U CN204234978 U CN 204234978U CN 201420634520 U CN201420634520 U CN 201420634520U CN 204234978 U CN204234978 U CN 204234978U
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- China
- Prior art keywords
- roll
- overlay cladding
- layer
- new roller
- welding wire
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Abstract
A kind of new roller overlay cladding, be made up of the body of roll and roll neck two parts, the surface coverage of the described body of roll has layer, and the phosphorus content of described layer and the mother metal phosphorus content of described roll match.The utility model has saved alloy resource on the one hand, reduces manufacturing cost; Roller surface hardness number HRC can reach 52 ~ 54, and welding performance is good; On the other hand, roll campaign improves 2 ~ 3 times, and in roll repair welding process, greatly save the handling roll time, improves operating efficiency, greatly reduces the labour intensity of handling roll simultaneously.
Description
Technical field
The utility model relates to steel rolling field, particularly a kind of new roller overlay cladding.
Background technology
In current steel rolling field, improve the significant concern problem of stocking inherent quality and precision, reduction production cost Shi Ge enterprise.The application of rolling new technology effectively can improve the quality of stocking, but simultaneously also the various performance such as hardness, wearability, crack resistance of breaker roll have higher requirement.In all parts of milling train, roll is very important parts, and Main Function is that protection working roll does not bend, and bear high extruding force, shock loading, fatigue and wearing and tearing etc. at work, therefore the consumption of roll is very large.Usual roll by the body of roll, roll neck and spindle nose three part form, roll neck is installed within the bearing, and by bearing block and screwdown gear, rolling cutter is passed to frame; Spindle nose is connected with connecting axle, for transmitting rolling torsion.
One of quality key becoming welding quality of welding wire, careless slightlyly will cause whole roller to be scrapped.After welding, on the one hand, the usual hardness of layer is low, wear no resistance, the life-span is low for existing welding wire, on the other hand, the roller comprehensive performance after adopting welding wire to repair is poor, and manufacturing cost is high, inefficiency, the at present domestic roll REPAIR WELDING strengthening welding wire technology not yet occurring comparative maturity.
Utility model content
The purpose of this utility model be overcome prior art above-mentioned deficiency and the new roller overlay cladding that a kind of hardness is high, wearability good, the life-span is high is provided, thus improve the combination property of roll, reduce manufacturing cost, increase work efficiency, greatly save the time of handling roll, reduce the labour intensity of handling roll.
The technical solution of the utility model is: a kind of new roller overlay cladding, and be made up of the body of roll and roll neck two parts, the surface coverage of the described body of roll has layer, and the phosphorus content of described layer and the mother metal phosphorus content of described roll match.
Further, the quality of parent material of described roll selects 42CrMo quenched and tempered steel.
Further, the thickness of described layer is 20 ~ 50mm.
Further, described layer welds melting by alloy welding wire and is formed, and the main component of described alloy welding wire comprises C, Cr, Mn, Si, Ni, W, Mo.
Further, the composition of described alloy welding wire also comprises Sb, Nb and rare earth magnesium.
Further, the diameter of described alloy welding wire is 2.5 ~ 4mm.
In the main component of the utility model alloy welding wire:
C is gap solid solution element; Be one of metal strengthening element effective element, weld strength can be improved rapidly; But it greatly will reduce impact flexibility and improve ductile-brittle transition temperature, thus crack resistance greatly reduces; The too low elevated temperature strength that can reduce weld seam of C content, C content is too high easily there is solidification cracking again, so can only reach intensity needs by adding other intensified element when high-strength roller welding.
Cr, improves the content of Cr element while being conducive to improving welding seam toughness, can also form the carbide of Dispersed precipitate with C and improve weld strength; Cr element is conducive to the content improving acicular ferrite, reduces pro-eutectoid ferrite, and has the effect of fining ferrite grains, improves weld strength toughness, and after Cr also contributes to keeping weld seam heat treatment, performance maintains higher level.
Mn, when welding wire is transitioned in weld seam, is mingled with by deoxygenation formation oxide inclusions or oxygen sulfur compound; Mn is the effective element of weld seam Strengthening and Toughening, in weld seam, be conducive to deoxidation, prevents the formation of the iron sulfide causing fire check; Mn can improve the quenching degree of weld metal, suppresses the generation of pro-eutectoid ferrite, promotes the formation of acicular ferrite.
Si, ensures weld strength in order to the oxidation and stable base preventing weld seam, guarantees the ductility of weld part, maintains weld bead shape.
Ni is a kind of element of traditional acquisition superior low-temperature toughness, and it can improve the toughness of ferrite matrix and promote ferritic formation; Also help the toughness improving weld metal, low-temperature impact toughness especially, reduce ductile-brittle transition temperature.
W, can improve red hardness and the heat resistance of roll, and can improve the wearability of roll.
Mo is the essential element obtaining high strength weld metal; It is as a kind of high melting-point material, good to Grain refinement, and little to plasticity and toughness damage while raising intensity.A certain amount of Mo is added in alloy system, utilize its atom larger, the feature of larger than atoms such as Ni, Fe 9% ~ 12%, enlarge markedly Ni based solid solution lattice paprmeter, thus improve the yield strength of weld metal, meanwhile, Mo can improve the spot corrosion and crevice corrosion ability that in austenitic alloy, Cl-causes.But because Mo is also the one of the chief elements causing weld seam embrittlement, therefore must its content in alloy system of considered critical.
By the alloy welding wire becoming to be grouped into above, it is welding wire already present in prior art.
The utility model compared with prior art has following features:
(1) C content of alloy welding wire and mother metal phosphorus content match, the life-span of roll is made to improve 2 ~ 3 times, and when roll has damage in rolling, can directly adopt alloy welding wire Repair Welding, namely mend and namely use, greatly save the handling roll time, improve operating efficiency, greatly reduce the labour intensity of handling roll simultaneously;
(2) quality of parent material of roll selects 42CrMo quenched and tempered steel, has certain intensity and good welding procedure;
(3) layer that this alloy welding wire is formed after welding, make roller surface hardness number HRC to reach 52 ~ 54, and welding performance is good.
Accompanying drawing explanation
Fig. 1 is the structural representation of the utility model embodiment.
Detailed description of the invention
Below in conjunction with the drawings and specific embodiments, detailed construction of the present utility model is further described.
As shown in Figure 1: a kind of new roller overlay cladding, be made up of the body of roll 1 and roll neck 2 two parts, the body of roll 1 and roll neck 2 shape in aggregates; Roll neck 2 is installed within the bearing, and by bearing block and screwdown gear, rolling cutter is passed to frame.
The quality of parent material of roll selects 42CrMo quenched and tempered steel, has certain intensity and good welding procedure.The surface coverage of the body of roll has layer 3, and layer 3 welds melting by alloy welding wire and formed, and the phosphorus content of layer 3 and the mother metal phosphorus content of roll match, and make the life-span of roll improve 2 ~ 3 times.
The main component of alloy welding wire comprises C, Cr, Mn, Si, Ni, W, Mo, the layer 3 formed after welding by this alloy welding wire, after tempered adjustment, roller surface hardness number HRC can be made to reach 52 ~ 54, and welding performance is good.
The main component of the utility model roll sealing alloy welding wire is in table 1, and the diameter of welding wire is 2.5mm, and the thickness of layer 3 is 25mm.
Table 1 unit: percentage by weight (%)
Adopt the method for open arc built-up welding to carry out the recovery test of roll, the roller surface hardness adopting the measurement of HR-150A Rockwell apparatus to repair, the results are shown in Table 2.Visible, the rolling face hardness after reparation is even, and average hardness HRC53.76, can meet the instructions for use of actual condition.
Table 2
Service condition:
In above embodiment, the phosphorus content of layer 3 and the mother metal phosphorus content of roll match, when roll has a damage in rolling, the alloy welding wire of above-described embodiment is used to carry out soldering, namely can mend and namely use, greatly save the handling roll time, improve operating efficiency, greatly reduce the labour intensity of handling roll simultaneously; Roll Preliminary Results after reparation shows, combination property is good, actual life more than 1 year, its wearability and fatigue crack good, low cost of manufacture.Empirical tests, a cold roll machine can save more than 500,000 in 1 year.
Claims (5)
1. a new roller overlay cladding, is made up of the body of roll and roll neck two parts, it is characterized in that: the surface coverage of the described body of roll has layer, and the phosphorus content of described layer and the mother metal phosphorus content of described roll match.
2. new roller overlay cladding according to claim 1, is characterized in that: the quality of parent material of described roll selects 42CrMo quenched and tempered steel.
3. new roller overlay cladding according to claim 1 and 2, is characterized in that: the thickness of described layer is 20 ~ 50mm.
4. new roller overlay cladding according to claim 1 and 2, is characterized in that: described layer welds melting by alloy welding wire and formed, and the main component of described alloy welding wire comprises C, Cr, Mn, Si, Ni, W, Mo.
5. new roller overlay cladding according to claim 4, is characterized in that: the diameter of described alloy welding wire is 2.5 ~ 4mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420634520.3U CN204234978U (en) | 2014-10-29 | 2014-10-29 | A kind of new roller overlay cladding |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420634520.3U CN204234978U (en) | 2014-10-29 | 2014-10-29 | A kind of new roller overlay cladding |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN204234978U true CN204234978U (en) | 2015-04-01 |
Family
ID=52764530
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201420634520.3U Expired - Fee Related CN204234978U (en) | 2014-10-29 | 2014-10-29 | A kind of new roller overlay cladding |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN204234978U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105217265A (en) * | 2015-10-23 | 2016-01-06 | 辽宁科技大学 | A kind of wearproof roller of travelling apron |
| CN116060466A (en) * | 2023-02-07 | 2023-05-05 | 中国第一重型机械股份公司 | Roller composite extrusion method and roller |
-
2014
- 2014-10-29 CN CN201420634520.3U patent/CN204234978U/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105217265A (en) * | 2015-10-23 | 2016-01-06 | 辽宁科技大学 | A kind of wearproof roller of travelling apron |
| CN116060466A (en) * | 2023-02-07 | 2023-05-05 | 中国第一重型机械股份公司 | Roller composite extrusion method and roller |
| CN116060466B (en) * | 2023-02-07 | 2024-01-12 | 中国第一重型机械股份公司 | Roller composite extrusion method and roller |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20150401 Termination date: 20191029 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |