CN109226934A - The overlaying method of roll - Google Patents
The overlaying method of roll Download PDFInfo
- Publication number
- CN109226934A CN109226934A CN201811291148.XA CN201811291148A CN109226934A CN 109226934 A CN109226934 A CN 109226934A CN 201811291148 A CN201811291148 A CN 201811291148A CN 109226934 A CN109226934 A CN 109226934A
- Authority
- CN
- China
- Prior art keywords
- roll
- welding
- millimeters
- built
- thickness
- 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.)
- Granted
Links
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
- B23K9/00—Arc welding or cutting
- B23K9/0026—Arc welding or cutting specially adapted for particular articles or work
-
- 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
- B23K9/00—Arc welding or cutting
- B23K9/04—Welding for other purposes than joining, e.g. built-up welding
- B23K9/044—Built-up welding on three-dimensional surfaces
- B23K9/046—Built-up welding on three-dimensional surfaces on surfaces of revolution
- B23K9/048—Built-up welding on three-dimensional surfaces on surfaces of revolution on cylindrical surfaces
-
- 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
- B23K9/00—Arc welding or cutting
- B23K9/18—Submerged-arc welding
- B23K9/186—Submerged-arc welding making use of a consumable electrodes
-
- 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
- B23K9/00—Arc welding or cutting
- B23K9/235—Preliminary treatment
Landscapes
- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Plasma & Fusion (AREA)
- Mechanical Engineering (AREA)
- Reduction Rolling/Reduction Stand/Operation Of Reduction Machine (AREA)
Abstract
The invention discloses a kind of welding method of roll, roll has the body of roll and is located at the axle journal at the body of roll both ends, and roll is made of 50CrMo4V steel, comprising the following steps: carries out machining to the outer circle of the body of roll of abrasion；Body of roll clamping on welding special purpose machine tool, and make heating compartment of the body of roll across electric heating welding tooling；Start the electric heating welding tooling, increase the intracorporal temperature of heater box and controls between 300 DEG C~350 DEG C；Using special roller surfacing equipment successively to body of roll built-up welding prime coat and capping wearing layer.Compared with the prior art, the stability that the present invention can solve existing body of roll surfacing quality is poor, and the problem of alloy-layer cracking and chip off-falling easily occurs in use in the roll of heap postwelding.
Description
Technical field
The present invention relates to welding tooling manufacturing technology field, especially a kind of tooling for roll overlaying.
Background technique
Roll is one of important parts of roller straightener, and roll has the body of roll and is located at the axle journal at the body of roll both ends；Roll
Effect is the correction carried out by shape defect of the body of roll to Metal Forming product, is important one of finishing procedure.It rolls
Material is in the operation of rolling or often generates in later cooling and transportational process various shapes defect, such as bar, profile and
The bending of tubing, bending, wave, wooden dipper song of Strip etc..The defects of can making bending by various straightening process, is in external force
Under be eliminated, so that product is reached qualified state.Since roll is for a long time by the erosion of alternating temperature-changing, steam, body surface meeting
There is the defects of pockmark, scar block, crackle, body of roll axial surface there is also abrasion non-uniform phenomenon, need frequency so as to cause roll
Numerous replacement.And general method is the dimensional accuracy to the body of roll progress extensive body of roll of built-up welding, but since the material of the body of roll belongs to superelevation
The stability of the structural alloy steel of intensity, surfacing quality is poor, easily occur during the work roll cooling after reparation alloy-layer cracking and
The problem of chip off-falling.
Summary of the invention
Technical problem to be solved by the invention is to provide a kind of welding methods of roll, to solve existing body of roll built-up welding
The stability of quality is poor, and the problem of alloy-layer cracking and chip off-falling easily occurs in use in the roll of heap postwelding.
The technical proposal for solving the technical problem of the invention are as follows: a kind of welding method of roll, roll have the body of roll
With the axle journal for being located at the body of roll both ends, the roll is made of 50CrMo4V steel comprising following steps:
A, machining is carried out to the outer circle of the body of roll of abrasion, the excircle dimension of the body of roll is machined to the roller of finished product
The excircle dimension of body is 18 millimeters small~and 22 millimeters；
B, the axle journal clamping of described body of roll one end on the chuck of welding special purpose machine tool, axis described in the body of roll other end
The tailstock center phase apical grafting of the end of neck and the welding special purpose machine tool, and the body of roll is made to pass through adding for electric heating welding tooling
Hot tank body；
C, start the electric heating welding tooling, increase the intracorporal temperature of the heater box and control 300 DEG C~350 DEG C it
Between；
D, using special roller surfacing equipment, successively to the body of roll built-up welding prime coat and capping wearing layer；Bottoming described in built-up welding
Layer, uses high nickel bare welding filter metal to the body of roll with the circumferentially continuous spiral submerged arc overlay welding of monofilament, the prime coat bead-on-plate weld is wide
Degree is 18 millimeters~20 millimeters, and weld seam amount of lap is controlled 45%~50%；The prime coat with a thickness of 3 millimeters, it is each described
The circumferentially continuous spiral submerged arc overlay welding of monofilament with a thickness of 2 millimeters~3 millimeters, be sequentially overlapped built-up welding until reach the bottoming
The thickness of layer；
Capping wearing layer described in built-up welding, use in carbon alloy welding wire to the body of roll with the circumferentially continuous spiral submerged arc heap of monofilament
Weldering, the capping wearing layer bead-on-plate weld width control is at 16 millimeters~18 millimeters, and amount of lap control exists between weld seam and weld seam
50%；The capping wearing layer with a thickness of 9 millimeters, each circumferentially continuous spiral submerged arc overlay welding of monofilament with a thickness of 2
Millimeter~3 millimeters is sequentially overlapped built-up welding until the thickness for reaching the capping wearing layer can be from the welding special machine
Bed unloads the roll；
E, the roll for completing built-up welding is put into heat-treatment furnace, is heated to 560 DEG C with 50 DEG C/h heating rate, heat preservation 5 is small
When after cool to room temperature with the furnace；
The excircle dimension that the outer circle of the body of roll is milled to the body of roll of finished product is completed the welding of roll by F.
In the welding method technical solution of above-mentioned roll, more specific technical solution be may also is that at the body of roll both ends
Weld one piece of ring flat-plate.
Further: the electric heating welding tooling in step B includes being set on the rack the heating compartment, described
Heating compartment has the case ontology for being movably equipped with upper box lid, and the case ontology is equipped with the side opening for installing roll in both ends；
It is equipped with flame-retardant fibre board in the inner wall of the case ontology, is equipped with resistance band on the flame-retardant fibre board；In the case ontology
It is interior equipped with the thermocouple being connect with temperature controller；The case ontology is rectangular box, which has bottom plate and difference
Long side plate and the short side plate being symmetrically enclosed on bottom plate, the side opening of the case ontology are opened on the short side plate；The resistance
Band is laid on the flame-retardant fibre board on two blocks of long side plates；Movable case lid is equipped on the case ontology.
Further: the body of roll passes through the inner cavity of the rectangular box ontology, institute by the side opening on the short side plate
Stating the distance between the body of roll and the resistance band is 48 millimeters~53 millimeters.
By adopting the above-described technical solution, compared with prior art, the present invention has the following advantages: 1, due to rolling
Roller base is made of the middle carbon and low-alloy forged steel of 50CrMo4V, passes through the circumferentially continuous spiral submerged arc overlay welding of the monofilament of continuous samming
Respectively by high nickel bare welding filter metal and middle carbon alloy welding wire deposition in rolling body matrix surface, have body roller " tough roller core hard surface ", improves
In use easily there is alloy-layer cracking and chip off-falling in the stability of body of roll surfacing quality, the body of roll for eliminating heap postwelding
Problem makes weld seam have the performance that hardness is high, slight big, wearability is good, and tooling device cost can be greatly reduced, and mitigates labor
Dynamic operation intensity, realizes lower price high efficiency；2, samming protection is carried out to the body of roll of roll using electric heating welding tooling, can reduce because
The required benefit temperature process of temperature is lost in welding, effectively shortens the built-up welding construction period, is a kind of process innovation, low cost, welding quality
High welding method.
Detailed description of the invention
Fig. 1 is the structural schematic diagram of the roll of the embodiment of the present invention.
Fig. 2 is the electric heating welding tooling structural schematic diagram of the embodiment of the present invention.
Fig. 3 is Fig. 2 top view.
Specific embodiment
Below in conjunction with attached drawing, the invention will be further described:
Embodiment 1:
A kind of welding method of roll, roll 1 as shown in Figure 1 have body of roll 1-2 and are respectively provided at the both ends body of roll 1-2
Axle journal 1-1 and axle journal 1-3, roll are made of 50CrMo4V steel comprising following steps:
A, machining is carried out to the outer circle of the body of roll 1-2 of abrasion, the excircle dimension of body of roll 1-2 is machined to the body of roll than finished product
The excircle dimension of 1-2 is 18 millimeters small；
B, the axle journal dress 1-1 of the one end body of roll 1-2 is clipped on the chuck 2-1 of welding special purpose machine tool 2, another end-journal of the body of roll
The tailstock center 2-2 phase apical grafting of the end of 1-3 and welding special purpose machine tool 2, and body of roll 1-2 is made to pass through electric heating welding tooling
Heating compartment 4 case ontology after, by case lid lid close on case ontology；Electric heating welding tooling as shown in Figures 2 and 3 includes
The heating compartment 4 being located between the chuck 2-1 and tailstock center 2-2 of welding special purpose machine tool 2, which, which has, is located at machine
Case ontology on frame 4-1, the case ontology of the present embodiment are rectangular box, and the rectangular box is with bottom plate 4-2 and respectively symmetrically
Long side plate 4-3 and the short side plate 4-4 being enclosed on bottom plate 4-2；Case ontology is equipped in both ends and opens for installing the side of roll
Mouthful, the side opening of the case ontology of the present embodiment is opened on the short side plate 4-4 of two sides；It is equipped with flame retardant coating in the inner wall of case ontology, this
The flame retardant coating of embodiment is flame-retardant fibre board, and refractory fibre is laid on respectively on long side plate and short side plate, the fire resisting on long side plate
Fiberboard is flame-retardant fibre board 4-5；Resistance band 4-6 is equipped on flame retardant coating, the resistance band 4-6 of the present embodiment is spread respectively
It is located on the flame-retardant fibre board 4-5 on side plate 4-3 two pieces long；The temperature connecting with temperature controller is equipped in case ontology to pass
Sensor, the embodiment of the present invention temperature controller are electric thermo-couple temperature controller (not shown), and temperature sensor is thermoelectricity
Even (not shown)；Movable case lid is equipped on case ontology；Wherein body of roll 1-2 is passed through by the side opening on short side plate
When the inner cavity of rectangular box ontology, the distance between the outer circle of the body of roll and resistance band are 48 millimeters；
C, start electric heating welding tooling, increase the intracorporal temperature of heater box and control between 300 DEG C~350 DEG C；
D, case lid is opened, first respectively welds one piece of ring flat-plate at the both ends body of roll 1-2, reuses the farm labourer of special roller surfacing equipment 3
Plumb joint 3-1 is moved successively to body of roll 1-2 built-up welding prime coat and capping wearing layer；Built-up welding prime coat, using high nickel bare welding filter metal to roller
For body with the circumferentially continuous spiral submerged arc overlay welding of monofilament, prime coat bead-on-plate weld width is 18 millimeters~20 millimeters, weld seam overlap joint
Amount control is 45%~50%；Prime coat with a thickness of 3 millimeters, each circumferentially continuous spiral submerged arc overlay welding of monofilament with a thickness of
2 millimeters~3 millimeters, built-up welding is sequentially overlapped until reaching the thickness of prime coat；
Built-up welding capping wearing layer, use in carbon alloy welding wire to the body of roll with the circumferentially continuous spiral submerged arc overlay welding of monofilament, capping
Wearing layer bead-on-plate weld width is controlled at 16 millimeters~18 millimeters, and amount of lap control is 50% between weld seam and weld seam；Capping is wear-resisting
Layer with a thickness of 9 millimeters, each circumferentially continuous spiral submerged arc overlay welding of monofilament with a thickness of 2 millimeters~3 millimeters, be sequentially overlapped
Built-up welding can unload bottom roll 1 from welding special purpose machine tool until reaching the thickness of capping wearing layer；
D, the roll 1 for completing built-up welding is put into heat-treatment furnace, after being heated to 560 DEG C, heat preservation 5 hours with 50 DEG C/h heating rate
Cool to room temperature with the furnace；
The excircle dimension that the outer circle of body of roll 1-2 is milled to the body of roll of finished product is completed the welding of roll by E.
Embodiment 2:
A, machining is carried out to the outer circle of the body of roll 1-2 of abrasion, the excircle dimension of body of roll 1-2 is machined to the body of roll than finished product
The excircle dimension of 1-2 is 22 millimeters small；
B, wherein body of roll 1-2 by the side opening on short side plate pass through rectangular box ontology inner cavity when, the outer circle of body of roll 1-2 with
The distance between resistance band is 53 millis；
Other are same as Example 1.
Since roll base is made of the middle carbon and low-alloy forged steel of 50CrMo4V, connected by the monofilament circumferencial direction of continuous samming
Continue spiral submerged arc overlay welding respectively by high nickel bare welding filter metal and middle carbon alloy welding wire deposition in rolling body matrix surface, body roller is made to have " tough roller
Core hard surface " eliminates in use process and the problem of alloy-layer cracking and chip off-falling easily occurs, and weld seam is made to have hardness high, slight
Greatly, tooling device cost can be greatly reduced in the good performance of wearability, mitigate labor operation intensity, realize lower price high efficiency；Separately
Outside, samming protection is carried out using the body of roll of the electric heating welding tooling to roll, can reduced because the required benefit temperature process of temperature is lost in welding,
The built-up welding construction period is effectively shortened, is the high welding method of a kind of process innovation, low cost, welding quality.
Claims (4)
1. a kind of welding method of roll, roll has the body of roll and is located at the axle journal at the body of roll both ends, the roll by
50CrMo4V steel is made, it is characterised in that the following steps are included:
A, machining is carried out to the outer circle of the body of roll of abrasion, the excircle dimension of the body of roll is machined to the roller of finished product
The excircle dimension of body is 18 millimeters small~and 22 millimeters；
B, the axle journal clamping of described body of roll one end on the chuck of welding special purpose machine tool, axis described in the body of roll other end
The tailstock center phase apical grafting of the end of neck and the welding special purpose machine tool, and the body of roll is made to pass through adding for electric heating welding tooling
Hot tank body；
C, start the electric heating welding tooling, increase the intracorporal temperature of the heater box and control 300 DEG C~350 DEG C it
Between；
D, using special roller surfacing equipment, successively to the body of roll built-up welding prime coat and capping wearing layer；Bottoming described in built-up welding
Layer, uses high nickel bare welding filter metal to the body of roll with the circumferentially continuous spiral submerged arc overlay welding of monofilament, the prime coat bead-on-plate weld is wide
Degree is 18 millimeters~20 millimeters, and weld seam amount of lap is controlled 45%~50%；The prime coat with a thickness of 3 millimeters, it is each described
The circumferentially continuous spiral submerged arc overlay welding of monofilament with a thickness of 2 millimeters~3 millimeters, be sequentially overlapped built-up welding until reach the bottoming
The thickness of layer；
Carbon alloy welding wire is to the body of roll with the circumferentially continuous spiral submerged arc overlay welding of monofilament, the wear-resisting layer heap of capping in using
Welding line width is controlled at 16 millimeters~18 millimeters, and amount of lap control is 50% between weld seam and weld seam；The capping wearing layer
With a thickness of 9 millimeters, each circumferentially continuous spiral submerged arc overlay welding of monofilament with a thickness of 2 millimeters~3 millimeters, be sequentially overlapped
Built-up welding can unload the roll from the welding special purpose machine tool until reaching the thickness of the capping wearing layer；
E, the roll for completing built-up welding is put into heat-treatment furnace, is heated to 560 DEG C with 50 DEG C/h heating rate, heat preservation 5 is small
When after cool to room temperature with the furnace；
The excircle dimension that the outer circle of the body of roll is milled to the body of roll of finished product is completed the welding of roll by F.
2. the welding method of roll according to claim 1, it is characterised in that: weld one piece of ring at the body of roll both ends
Plate.
3. the welding method of roll according to claim 1 or 2, it is characterised in that: the electric heating welding in step B
Tooling includes being set on the rack the heating compartment, and the heating compartment has the case ontology for being movably equipped with upper box lid, described
Case ontology is equipped with the side opening for installing roll in both ends；It is equipped with flame-retardant fibre board in the inner wall of the case ontology, described
Resistance band is equipped on flame-retardant fibre board；The thermocouple connecting with temperature controller is equipped in the case ontology；The case sheet
Body is rectangular box, long side plate and the short side plate which has bottom plate and be respectively symmetrically enclosed on bottom plate, the case
The side opening of ontology is opened on the short side plate；The resistance band is laid on the flame-retardant fibre board on two blocks of long side plates
On；Movable case lid is equipped on the case ontology.
4. the welding method of roll according to claim 3, it is characterised in that: the body of roll passes through on the short side plate
Side opening passes through the inner cavity of the rectangular box ontology, and the distance between the body of roll and the resistance band are 48 millimeters~53 millis
Rice.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811291148.XA CN109226934B (en) | 2018-10-31 | 2018-10-31 | Build-up welding method for roller |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811291148.XA CN109226934B (en) | 2018-10-31 | 2018-10-31 | Build-up welding method for roller |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN109226934A true CN109226934A (en) | 2019-01-18 |
| CN109226934B CN109226934B (en) | 2021-01-12 |
Family
ID=65080089
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201811291148.XA Active CN109226934B (en) | 2018-10-31 | 2018-10-31 | Build-up welding method for roller |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN109226934B (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110560853A (en) * | 2019-09-23 | 2019-12-13 | 江苏瑞米克金属技术有限公司 | surfacing method for roller (shaft) workpiece |
| CN113102863A (en) * | 2021-05-28 | 2021-07-13 | 广西建工集团第一安装工程有限公司 | High-efficiency roller gear tooth hard alloy surfacing system and surfacing method |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS62176678A (en) * | 1986-01-28 | 1987-08-03 | Kobe Steel Ltd | Production of roll receiving high heat load |
| CN101947713A (en) * | 2010-09-17 | 2011-01-19 | 江西恒大高新技术股份有限公司 | Roll surface wear-resisting repair technology for cement roller press |
| CN102189316A (en) * | 2010-03-11 | 2011-09-21 | 上海一钢机电有限公司 | Submerged-arc welding overlaying repairing method for stainless steel hot rolled delivery roll |
| CN202539847U (en) * | 2012-05-08 | 2012-11-21 | 郑州越达自动化焊接设备有限公司 | Special machine for overlaying roller and roller overlaying insulation cover |
| CN103418923A (en) * | 2013-08-30 | 2013-12-04 | 北京工业大学 | Overlaying repair method for worn roller |
| CN104084750A (en) * | 2014-07-10 | 2014-10-08 | 河北瑞兆激光再制造技术有限公司 | Submerged-arc welding repair method after alkali production squeezing roller is worn |
| CN108453467A (en) * | 2018-03-27 | 2018-08-28 | 江苏龙胜机床制造有限公司 | A method of manufacturing bending roll using technology for repairing surfacing |
-
2018
- 2018-10-31 CN CN201811291148.XA patent/CN109226934B/en active Active
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS62176678A (en) * | 1986-01-28 | 1987-08-03 | Kobe Steel Ltd | Production of roll receiving high heat load |
| CN102189316A (en) * | 2010-03-11 | 2011-09-21 | 上海一钢机电有限公司 | Submerged-arc welding overlaying repairing method for stainless steel hot rolled delivery roll |
| CN101947713A (en) * | 2010-09-17 | 2011-01-19 | 江西恒大高新技术股份有限公司 | Roll surface wear-resisting repair technology for cement roller press |
| CN202539847U (en) * | 2012-05-08 | 2012-11-21 | 郑州越达自动化焊接设备有限公司 | Special machine for overlaying roller and roller overlaying insulation cover |
| CN103418923A (en) * | 2013-08-30 | 2013-12-04 | 北京工业大学 | Overlaying repair method for worn roller |
| CN104084750A (en) * | 2014-07-10 | 2014-10-08 | 河北瑞兆激光再制造技术有限公司 | Submerged-arc welding repair method after alkali production squeezing roller is worn |
| CN108453467A (en) * | 2018-03-27 | 2018-08-28 | 江苏龙胜机床制造有限公司 | A method of manufacturing bending roll using technology for repairing surfacing |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110560853A (en) * | 2019-09-23 | 2019-12-13 | 江苏瑞米克金属技术有限公司 | surfacing method for roller (shaft) workpiece |
| CN113102863A (en) * | 2021-05-28 | 2021-07-13 | 广西建工集团第一安装工程有限公司 | High-efficiency roller gear tooth hard alloy surfacing system and surfacing method |
Also Published As
| Publication number | Publication date |
|---|---|
| CN109226934B (en) | 2021-01-12 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN104816076B (en) | A kind of pipe pipe butt weld technologies for steel method of continuous pipe | |
| CN100450689C (en) | Repairing welding method for crack of rotor support power generator | |
| CN107335939B (en) | The build-up welding repair process of large-scale 70Cr3Mo backing roll | |
| CN103071878B (en) | Braze welding method for hard alloy and low-alloy and high-strength steel | |
| CN109848650B (en) | Processing method of B-shaped sleeve | |
| CN105436665A (en) | Surfacing reconstructed layer of large hot-rolled supporting roll Cr4 and method for repairing roll | |
| CN101481995A (en) | High steel level petroleum casing pipe and oil pipe manufacturing process | |
| CN109226934A (en) | The overlaying method of roll | |
| CN104138920A (en) | Method for manufacturing rolled metal composite plate with pipeline steel as base material | |
| CN104550955B (en) | A kind of process manufacturing for screw rod laser in combination | |
| CN109454313A (en) | A kind of big specification low-alloy steel tube sheet welding plate preparation process | |
| WO2016110159A1 (en) | Method for welding and repairing rack crack of four-roll plate bending machine | |
| CN103924238B (en) | Laser Cladding Ni-base Alloy+B on Q550 steel4c strengthens the method for phase | |
| CN109468633A (en) | The method that a kind of pair of roll is repaired | |
| CN105458633B (en) | A kind of manufacture method of mild steel coiled tubing | |
| CN102453895A (en) | Method for preparing heat-resistant and wear-resistant alloy coatings on surfaces of hot rolling plate fine rolling conveying rollers | |
| CN110484912A (en) | A kind of restorative procedure of coil wrapper roll roll surface, reparation coil wrapper roll | |
| CN108637428B (en) | Repair welding repair repairing method for defects of high-strength gear ring type steel castings | |
| CN103658929A (en) | Method for repairing and manufacturing bending roll in surfacing mode | |
| CN110142570A (en) | A kind of wear-resisting, resisting viscosity steel composite coating, preparation method and application | |
| CN209110402U (en) | Electric heating welding tooling | |
| CN111872647B (en) | Preparation method of three-way product | |
| CN108453467A (en) | A method of manufacturing bending roll using technology for repairing surfacing | |
| CN109848665A (en) | The preparation method of overlay clad hot-work die | |
| CN109454333A (en) | Spinning part circumferential weld laser-GMA complex welding method |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |