CN102744496B - Surface overlaying and processing method for pinch roller manufacturing and repairing - Google Patents
Surface overlaying and processing method for pinch roller manufacturing and repairing Download PDFInfo
- Publication number
- CN102744496B CN102744496B CN201210231309.2A CN201210231309A CN102744496B CN 102744496 B CN102744496 B CN 102744496B CN 201210231309 A CN201210231309 A CN 201210231309A CN 102744496 B CN102744496 B CN 102744496B
- Authority
- CN
- China
- Prior art keywords
- welding
- built
- pinch roll
- hours
- incubated
- 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.)
- Expired - Fee Related
Links
- 238000004519 manufacturing process Methods 0.000 title claims abstract description 22
- 238000003672 processing method Methods 0.000 title abstract description 4
- 238000000034 method Methods 0.000 claims abstract description 88
- 238000000137 annealing Methods 0.000 claims abstract description 57
- 229910052799 carbon Inorganic materials 0.000 claims abstract description 44
- 238000010438 heat treatment Methods 0.000 claims abstract description 42
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims abstract description 40
- 229910001145 Ferrotungsten Inorganic materials 0.000 claims abstract description 14
- PWHULOQIROXLJO-UHFFFAOYSA-N Manganese Chemical compound [Mn] PWHULOQIROXLJO-UHFFFAOYSA-N 0.000 claims abstract description 14
- PXHVJJICTQNCMI-UHFFFAOYSA-N Nickel Chemical compound [Ni] PXHVJJICTQNCMI-UHFFFAOYSA-N 0.000 claims abstract description 14
- 238000003466 welding Methods 0.000 claims description 216
- 229910052751 metal Inorganic materials 0.000 claims description 108
- 239000002184 metal Substances 0.000 claims description 108
- 239000010410 layer Substances 0.000 claims description 56
- 230000004907 flux Effects 0.000 claims description 52
- 238000010792 warming Methods 0.000 claims description 44
- 239000003814 drug Substances 0.000 claims description 38
- 229910052723 transition metal Inorganic materials 0.000 claims description 31
- 150000003624 transition metals Chemical class 0.000 claims description 31
- 230000029058 respiratory gaseous exchange Effects 0.000 claims description 24
- 229910000975 Carbon steel Inorganic materials 0.000 claims description 16
- 239000010962 carbon steel Substances 0.000 claims description 16
- 239000002994 raw material Substances 0.000 claims description 15
- 239000011229 interlayer Substances 0.000 claims description 14
- 229910000519 Ferrosilicon Inorganic materials 0.000 claims description 13
- 108010038629 Molybdoferredoxin Proteins 0.000 claims description 13
- HBELESVMOSDEOV-UHFFFAOYSA-N [Fe].[Mo] Chemical compound [Fe].[Mo] HBELESVMOSDEOV-UHFFFAOYSA-N 0.000 claims description 13
- 229910052742 iron Inorganic materials 0.000 claims description 13
- 230000008439 repair process Effects 0.000 claims description 12
- 239000000463 material Substances 0.000 abstract description 7
- 230000035939 shock Effects 0.000 abstract description 5
- 238000005299 abrasion Methods 0.000 abstract description 3
- 229910000604 Ferrochrome Inorganic materials 0.000 abstract 1
- 229910001309 Ferromolybdenum Inorganic materials 0.000 abstract 1
- 238000001816 cooling Methods 0.000 abstract 1
- 239000004615 ingredient Substances 0.000 abstract 1
- XWHPIFXRKKHEKR-UHFFFAOYSA-N iron silicon Chemical compound [Si].[Fe] XWHPIFXRKKHEKR-UHFFFAOYSA-N 0.000 abstract 1
- 229910000679 solder Inorganic materials 0.000 description 16
- 229910000831 Steel Inorganic materials 0.000 description 8
- 239000010959 steel Substances 0.000 description 8
- 230000002929 anti-fatigue Effects 0.000 description 5
- 208000037656 Respiratory Sounds Diseases 0.000 description 4
- 238000005096 rolling process Methods 0.000 description 4
- 229910000851 Alloy steel Inorganic materials 0.000 description 3
- 230000007704 transition Effects 0.000 description 3
- 238000002788 crimping Methods 0.000 description 2
- 230000007547 defect Effects 0.000 description 2
- 238000001514 detection method Methods 0.000 description 2
- 238000000227 grinding Methods 0.000 description 2
- 238000005098 hot rolling Methods 0.000 description 2
- 230000014759 maintenance of location Effects 0.000 description 2
- 238000009418 renovation Methods 0.000 description 2
- 238000005496 tempering Methods 0.000 description 2
- 241000209140 Triticum Species 0.000 description 1
- 235000021307 Triticum Nutrition 0.000 description 1
- 235000021168 barbecue Nutrition 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000005336 cracking Methods 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 238000005485 electric heating Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000003306 harvesting Methods 0.000 description 1
- 238000007689 inspection Methods 0.000 description 1
- 235000013372 meat Nutrition 0.000 description 1
- 238000003801 milling Methods 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 238000013021 overheating Methods 0.000 description 1
- 230000002265 prevention Effects 0.000 description 1
Landscapes
- Nonmetallic Welding Materials (AREA)
- Arc Welding In General (AREA)
Abstract
The invention discloses a surface overlaying and processing method for pinch roller manufacturing and repairing. The method comprises the following steps of: firstly, heating a pinch roller to be at 300-350 DEG C, keeping the temperature for 1.5-3 hours, further continuously heating to be at 380-450 DEG C and keeping the temperature for 8-12 hours; subsequently carrying out overlaying by adopting a flux-cored wire in a half Harvard furnace or a Harvard furnace, wherein flux-cored materials in the flux-cored wire comprise the following ingredients by weight percentage: 26-30% of micro-carbon ferro chrome, 6.0-7% of silicon iron, 6.0-8% of manganese metal, 10-12% of nickel powder, 4.0-6% of ferrotungsten, 6.0-8% of ferromolybdenum and the balance of iron powder; putting the pinch roller into an annealing furnace; heating the pinch roller to be at 300-350 DEG C and keeping the temperature for 1.5-3 hours; further heating to be at 450-500 DEG C and keeping the temperature for 15-30 hours; and cooling to be at the room temperature along with the furnace. The hard-face layer hardness of the surface of the pinch roller can be up to 55HRC+/-2HRC; the properties of high temperature abrasion resistance, shock resistance and fatigue resistance of the pinch roller are improved greatly; and the service life is relatively long.
Description
Technical field
The present invention relates to a kind of built-up welding processing method of roller surface, refer to particularly surface overlaying and heat treatment method in a kind of pinch roll manufacture and reparation.Be suitable for built-up welding and heat treatment process to hot rolling crimping machine pinch roll surface.
Background technology
Pinch roll is vitals on steel rolling equipment, and when work, the surface temperature of pinch roll is generally at 550～650 DEG C.This just requires pinch roll surface not only will have higher hardness, and antifatigue, the performance such as shock-resistant, also will have good high temperature abrasion resistance.For improving the service life of pinch roll, conventionally adopt the hard material that meets above-mentioned performance at surface overlaying one deck of pinch roll base material.Simultaneously; in the milling train course of work; pinch roll is shorter service life as consumable accessory, often can work 2～3 months time because occurring that crackle and wearing and tearing cause damage, removes after crackle and wearing layer built-up welding hard material method again and repairs also having under the pinch roll damaging to adopt.
China Patent Publication No.: CN101758309A, open day: on June 30th, 2010, denomination of invention " a kind of backing roll renovation technique ", has proposed following processing step: a. is rough turn; B. preheating, is warmed up to 350 DEG C with the speed of 120 DEG C per hour, comes out of the stove after being incubated after 8 hours; C. built-up welding transition zone, is preheating to roll 306 welding wires+HJ431 solder flux built-up welding transition zone of 3.2 millimeters of 350 DEG C, before solder flux uses 200 ~ 250 DEG C of barbecues 2 hours; D. built-up welding hardstanding, packs in stove after roll overlaying transition zone, and furnace temperature is raised to 380 ~ 400 DEG C, is incubated 2 hours, and solder flux will toast equally, uses 324 welding wires+HJ107 solder flux of 3.2 millimeters; E. tempering; F. half finish turning is to staying mill amount; G. grinding; H. tempering for the second time.This processing step is simple, can ensure the uniformity of roller hardness, and cut down finished cost.This renovation technique is relatively suitable for hardness, and shock resistance and resistance to elevated temperatures require the built-up welding reparation of lower backing roll one class hardstanding, is not suitable for the working condition requirement of pinch roll.In pinch roll making and repair process, due to the hardness of hardstanding, impact flexibility and high temperature abrasion resistance require all higher, need to adopt high-alloy steel welding material, in built-up welding process, have the problem that is difficult to take into account case hardness and high temperature impact toughness and wearability, or high-temperature behavior meets the demands, but case hardness is lower, or case hardness meets the demands, but deposited metal easily cracks, and causes the yield rate of pinch roll and is difficult to service life meet the demands.
Summary of the invention
The object of the invention is to overcome in existing pinch roll surface overlaying processing, yield rate is low, and deposited metal easily cracks, and the defect that service life is shorter and deficiency provide surface overlaying and heat treatment method in a kind of pinch roll manufacture and reparation.The pinch roll hardstanding hardness that the method is made is higher, and crack resistance, impact resistance, high-temperature wearable and anti-fatigue performance are good, reliable in quality, and the yield rate of pinch roll processing is high, long service life.
Technical solution of the present invention is: a kind of pinch roll manufacture and repair in surface overlaying and heat treatment method, comprise rough turn, preheating, deposited metal, the step of annealing,
In described preheating step, first be less than or equal to the speed heating pinch roll of 50 DEG C with intensification per hour, after being heated to 300～350 DEG C, be incubated 1.5～3 hours, then be less than or equal to the speed of 50 DEG C with intensification per hour and continue to be warming up to 380～450 DEG C, be incubated 8～12 hours;
In described deposited metal step, adopt flux-cored wire to join HJ260 fysed flux and carry out built-up welding, the metal of built-up welding is 4～12 layers, thickness is 10～30 millimeters, the interlayer temperature of surfacing layer metal is 320～350 DEG C, wherein, described flux-cored wire comprises carbon steel crust and medicine core, and the quality % of described medicine core raw material component is: chromic carbide iron 26～30%, ferrosilicon 6.0～7%, manganese metal 6.0～8%, nickel powder 10～12%, ferrotungsten 4.0～6%, molybdenum-iron 6.0～8%, surplus is iron powder, and the quality coefficient of described medicine core is 34～38%;
In described annealing steps, pinch roll after deposited metal is placed in to annealing furnace, with the programming rate that is less than or equal to 50 DEG C per hour, pinch roll is warming up to 300～350 DEG C, be incubated 1.5～3 hours, then continue to be warmed up to 450～500 DEG C with the programming rate that is less than or equal to 50 DEG C per hour, be incubated 15～30 hours, cool to pinch roll with the furnace room temperature again.
In described deposited metal step, after 2 layers of every built-up welding, pinch roll is sent in annealing furnace, heat up with the speed that is less than or equal to 50 DEG C per hour, while being warming up to 300～350 DEG C, be incubated 1～3 hour, then continue to be warming up to 400～450 DEG C with the programming rate that is less than or equal to 50 DEG C per hour, be incubated 8～12 hours, and then pinch roll put into half and breathe out not stove or breathe out not stove, repeat follow-up built-up welding.
In described deposited metal step, the quality % of described medicine core raw material component is: the quality % component of described medicine core raw material is: chromic carbide iron 28%, ferrosilicon 7.0%, manganese metal 7.0%, nickel powder 12%, ferrotungsten 6.0%, molybdenum-iron 8.0%, iron powder 32%; The weight coefficient of described medicine core is 36%.
In described annealing steps, the pinch roll after deposited metal is placed in to annealing furnace, with the programming rate of 50 DEG C per hour, pinch roll is warming up to 300 DEG C, is incubated 2 hours, then continue to be warmed up to 480 DEG C with the speed of 50 DEG C per hour, be incubated 24 hours, then cool to pinch roll with the furnace room temperature.
Described deposited metal step comprises built-up welding transition metal process and built-up welding overlaying metal process,
In built-up welding transition metal process, adopt 18CrMo flux-cored wire, join HJ260 fysed flux and carry out built-up welding, welding current I=380～the 400A of built-up welding, weldingvoltage V=30～34V, partly breathing out not stove or breathe out not, in stove, pinch roll is carried out to built-up welding, the transition metal of built-up welding is 2～4 layers, and thickness is 4～10 millimeters;
In built-up welding overlaying metal process, adopt flux-cored wire, join HJ260 fysed flux and carry out built-up welding, welding current I=400～the 450A of built-up welding, weldingvoltage V=32～34V, partly breathing out not stove or breathe out not, in stove, pinch roll is carried out to built-up welding, the overlaying metal of built-up welding is 4～7 layers, thickness is 10～25 millimeters, wherein, after 2 layers of every built-up welding, pinch roll is sent in annealing furnace, heat up with the speed that is less than or equal to 50 DEG C per hour, while being warming up to 300～350 DEG C, be incubated 1～3 hour, then continue to be warming up to 400～450 DEG C with the programming rate that is less than or equal to 50 DEG C per hour, be incubated 8～12 hours, and then pinch roll is put into half and breathe out not stove or breathe out not stove, repeat follow-up built-up welding.
In described built-up welding transition metal process and built-up welding overlaying metal process, before built-up welding, described fysed flux cures 1～3 hour at 300～350 DEG C.
In described built-up welding transition metal process, the transition metal of described built-up welding is 3 layers, and the interlayer temperature of surfacing layer metal is 320～350 DEG C, and before built-up welding, described fysed flux cures 2 hours at 350 DEG C;
In described built-up welding overlaying metal process, the overlaying metal of built-up welding is 5 layers, and the interlayer temperature of surfacing layer metal is 320～350 DEG C, and in weld deposit process, after 2 layers of every built-up welding, pinch roll is sent in annealing furnace, heated up with the speed of 50 DEG C per hour, at 300 DEG C, be incubated 2 hours, then continue to be warming up to 420 DEG C, be incubated 10 hours, and then put into and breathe out not stove, repeat follow-up built-up welding, before built-up welding, described fysed flux cures 2 hours at 350 DEG C.
In described deposited metal step or built-up welding transition metal process and built-up welding overlaying metal process, adopt roll built-up welding machine to carry out built-up welding.
The invention has the beneficial effects as follows: 1, pinch roll is after built-up welding of the present invention and heat treatment, directly carry out the machined on pinch roll surface, without again through Overheating Treatment, after machined, the hardness on pinch roll surface is higher, and its hardstanding hardness can reach 55HRC～57HRC, and the high-temperature wearable of pinch roll, shock resistance and anti-fatigue performance obviously improve, long service life.2, the good mechanical performance of weld metal, has good good high temperature impact toughness and good crack resistance, higher with the bonding strength of pinch roll base material.3, the present invention is in the preheating step of pinch roll, its programming rate is slower, heating-up temperature is higher and temperature retention time is longer, pinch roll is heated on the whole more even, make pinch roll base material more firm and stable with being connected of deposited metal, in weld deposit process, adopt and partly breathe out stove not or breathe out stove not the interlayer temperature of strictly controlling surfacing layer metal, to guarantee uniformity and the stability of deposited metal metallographic structure, in built-up welding overlaying metal process, after two layers of overlaying metal of every built-up welding, pinch roll to be sent in annealing furnace and annealed, eliminate in time the internal stress of deposited metal, the generation of Crack prevention, and improve shock resistance and the anti-fatigue performance of deposited metal, coordinate again the heating-up temperature after hardstanding built-up welding completes higher, the annealing steps that temperature retention time is grown, make deposited metal under high rigidity, there is good high temperature impact toughness, cracking resistance, anti-fatigue performance and heat treatment stability, in follow-up processing, also there is good machinability.4, the present invention's flux-cored wire composition used is simpler, convenient sources, and cost is lower.Be particularly suitable for the built-up welding welding of the pinch roll surface hardstanding of rolling high-alloy steel.
Detailed description of the invention
Below in conjunction with detailed description of the invention, the present invention is described in further detail:
Pinch roll manufacture and repair in surface overlaying and a heat treatment method, comprise rough turn, preheating, deposited metal, the step of annealing,
In described preheating step, first be less than or equal to the speed heating pinch roll of 50 DEG C with intensification per hour, after being heated to 300～350 DEG C, be incubated 1.5～3 hours, then be less than or equal to the speed of 50 DEG C with intensification per hour and continue to be warming up to 380～450 DEG C, be incubated 8～12 hours;
In described deposited metal step, adopt flux-cored wire to join HJ260 fysed flux and carry out built-up welding, the metal of built-up welding is 4～12 layers, thickness is 10～30 millimeters, the interlayer temperature of surfacing layer metal is 320～350 DEG C, wherein, described flux-cored wire comprises carbon steel crust and medicine core, and the quality % of described medicine core raw material component is: chromic carbide iron 26～30%, ferrosilicon 6.0～7%, manganese metal 6.0～8%, nickel powder 10～12%, ferrotungsten 4.0～6%, molybdenum-iron 6.0～8%, surplus is iron powder, and the quality coefficient of described medicine core is 34～38%;
In described annealing steps, pinch roll after deposited metal is placed in to annealing furnace, with the programming rate that is less than or equal to 50 DEG C per hour, pinch roll is warming up to 300～350 DEG C, be incubated 1.5～3 hours, then continue to be warmed up to 450～500 DEG C with the programming rate that is less than or equal to 50 DEG C per hour, be incubated 15～30 hours, cool to pinch roll with the furnace room temperature again.
In described deposited metal step, after 2 layers of every built-up welding, pinch roll is sent in annealing furnace, heat up with the speed that is less than or equal to 50 DEG C per hour, while being warming up to 300～350 DEG C, be incubated 1～3 hour, then continue to be warming up to 400～450 DEG C with the programming rate that is less than or equal to 50 DEG C per hour, be incubated 8～12 hours, and then pinch roll put into half and breathe out not stove or breathe out not stove, repeat follow-up built-up welding.
In described deposited metal step, the quality % of described medicine core raw material component is: the quality % component of described medicine core raw material is: chromic carbide iron 28%, ferrosilicon 7.0%, manganese metal 7.0%, nickel powder 12%, ferrotungsten 6.0%, molybdenum-iron 8.0%, iron powder 32%; The weight coefficient of described medicine core is 36%.
In described annealing steps, the pinch roll after deposited metal is placed in to annealing furnace, with the programming rate of 50 DEG C per hour, pinch roll is warming up to 300 DEG C, is incubated 2 hours, then continue to be warmed up to 480 DEG C with the speed of 50 DEG C per hour, be incubated 24 hours, then cool to pinch roll with the furnace room temperature.
Described deposited metal step comprises built-up welding transition metal process and built-up welding overlaying metal process,
In built-up welding transition metal process, adopt 18CrMo flux-cored wire, join HJ260 fysed flux and carry out built-up welding, welding current I=380～the 400A of built-up welding, weldingvoltage V=30～34V, partly breathing out not stove or breathe out not, in stove, pinch roll is carried out to built-up welding, the transition metal of built-up welding is 2～4 layers, and thickness is 4～10 millimeters;
In built-up welding overlaying metal process, adopt flux-cored wire, join HJ260 fysed flux and carry out built-up welding, welding current I=400～the 450A of built-up welding, weldingvoltage V=32～34V, partly breathing out not stove or breathe out not, in stove, pinch roll is carried out to built-up welding, the overlaying metal of built-up welding is 4～7 layers, thickness is 10～25 millimeters, wherein, after 2 layers of every built-up welding, pinch roll is sent in annealing furnace, heat up with the speed that is less than or equal to 50 DEG C per hour, while being warming up to 300～350 DEG C, be incubated 1～3 hour, then continue to be warming up to 400～450 DEG C with the programming rate that is less than or equal to 50 DEG C per hour, be incubated 8～12 hours, and then pinch roll is put into half and breathe out not stove or breathe out not stove, repeat follow-up built-up welding.
In described built-up welding transition metal process and built-up welding overlaying metal process, before built-up welding, described fysed flux cures 1～3 hour at 300～350 DEG C.
In described built-up welding transition metal process, the transition metal of described built-up welding is 3 layers, and the interlayer temperature of surfacing layer metal is 320～350 DEG C, and before built-up welding, described fysed flux cures 2 hours at 350 DEG C;
In described built-up welding overlaying metal process, the overlaying metal of built-up welding is 5 layers, and the interlayer temperature of surfacing layer metal is 320～350 DEG C, and in weld deposit process, after 2 layers of every built-up welding, pinch roll is sent in annealing furnace, heated up with the speed of 50 DEG C per hour, at 300 DEG C, be incubated 2 hours, then continue to be warming up to 420 DEG C, be incubated 10 hours, and then put into and breathe out not stove, repeat follow-up built-up welding, before built-up welding, described fysed flux cures 2 hours at 350 DEG C.
In described deposited metal step or built-up welding transition metal process and built-up welding overlaying metal process, adopt roll built-up welding machine to carry out built-up welding.
Embodiment 1
Pinch roll manufacture and repair in surface overlaying and a heat treatment method, comprise rough turn, preheating, deposited metal, the step of annealing,
In described preheating step, first with the speed heating pinch roll of 50 DEG C of intensifications per hour, be incubated 2 hours after being heated to 300 DEG C, then continue to be warming up to 400 DEG C with the speed of 50 DEG C per hour, be incubated 10 hours;
In described deposited metal step, adopt flux-cored wire to buy rations from the HJ260 fysed flux of Shanghai solder flux factory and carry out built-up welding, the thickness of deposited metal is 20 millimeters, the interlayer temperature of surfacing layer metal is 330 DEG C, and wherein, described flux-cored wire comprises carbon steel crust and medicine core, described carbon steel crust is H08A steel band, the quality % of described medicine core raw material component is: chromic carbide iron 28%, ferrosilicon 7.0%, manganese metal 7.0%, nickel powder 12%, ferrotungsten 6.0%, molybdenum-iron 8.0%, iron powder 32%; The weight coefficient of described medicine core is 36%.The diameter of described flux-cored wire is 2.5 millimeters.
Adopt roll built-up welding machine in stove, pinch roll to be carried out to built-up welding partly breathing out not, pinch roll is 330 DEG C in the temperature of partly breathing out in stove not, and the overlaying metal of built-up welding is 8 layers, and in weld deposit process, after 2 layers of every built-up welding, pinch roll is sent in annealing furnace, heated up with the speed of 50 DEG C per hour, at 300 DEG C, be incubated 2 hours, then continue to be warming up to 420 DEG C, be incubated 10 hours, and then put into half and breathe out not stove, repeat follow-up built-up welding, before built-up welding, described fysed flux cures 2 hours at 350 DEG C;
In described annealing steps, pinch roll after built-up welding overlaying metal is placed in to annealing furnace, with the programming rate of 40 DEG C per hour, pinch roll is warming up to 300 DEG C, is incubated 2 hours, then continue to be warmed up to 480 DEG C with the speed of 40 DEG C per hour, be incubated 24 hours, close again annealing furnace, cool to pinch roll with the furnace room temperature, complete built-up welding and the heat treatment process on pinch roll surface.
Embodiment 2
Pinch roll manufacture and repair in surface overlaying and a heat treatment method, comprise rough turn, preheating, deposited metal, the step of annealing,
In described preheating step, first with the speed heating pinch roll of 20 DEG C of intensifications per hour, be incubated 3 hours after being heated to 310 DEG C, then continue to be warming up to 380 DEG C with the speed of 20 DEG C per hour, be incubated 12 hours;
In described deposited metal step, adopt flux-cored wire to buy rations from the HJ260 fysed flux of Shanghai solder flux factory and carry out built-up welding, the thickness of deposited metal is 10 millimeters, and the interlayer temperature of surfacing layer metal is 320 DEG C, wherein, described flux-cored wire comprises carbon steel crust and medicine core, and described carbon steel crust is H08A steel band, and the quality % of described medicine core raw material component is: chromic carbide iron 27%, ferrosilicon 6.5%, manganese metal 6.5%, nickel powder 11%, ferrotungsten 5%; Molybdenum-iron 7%, iron powder 37%; The weight coefficient of described medicine core is 37%.The diameter of described flux-cored wire is 2.5 millimeters.
Adopt roll built-up welding machine in stove, pinch roll to be carried out to built-up welding breathing out not, pinch roll is 320 DEG C in the temperature of breathing out in stove not, and the overlaying metal of built-up welding is 4 layers, and in weld deposit process, after 2 layers of every built-up welding, pinch roll is sent in annealing furnace, heated up with the speed of 50 DEG C per hour, at 320 DEG C, be incubated 2.5 hours, then continue to be warming up to 400 DEG C, be incubated 12 hours, and then put into and breathe out not stove, repeat follow-up built-up welding, before built-up welding, described fysed flux cures 1 hour at 350 DEG C;
In described annealing steps, pinch roll after built-up welding overlaying metal is placed in to annealing furnace, with the programming rate of 50 DEG C per hour, pinch roll is warming up to 300 DEG C, is incubated 3 hours, then continue to be warmed up to 450 DEG C with the speed of 50 DEG C per hour, be incubated 30 hours, close again annealing furnace, cool to pinch roll with the furnace room temperature, complete built-up welding and the heat treatment process on pinch roll surface.
Embodiment 3
Pinch roll manufacture and repair in surface overlaying and a heat treatment method, comprise rough turn, preheating, deposited metal, the step of annealing,
In described preheating step, first with the speed heating pinch roll of 40 DEG C of intensifications per hour, be incubated 1.5 hours after being heated to 350 DEG C, then continue to be warming up to 450 DEG C with the speed of 40 DEG C per hour, be incubated 8 hours;
In described deposited metal step, adopt flux-cored wire to buy rations from the HJ260 fysed flux of Shanghai solder flux factory and carry out built-up welding, the thickness of deposited metal is 30 millimeters, the interlayer temperature of surfacing layer metal is 350 DEG C, and wherein, described flux-cored wire comprises carbon steel crust and medicine core, described carbon steel crust is H08A steel band, the quality % of described medicine core raw material component is: chromic carbide iron 30%, ferrosilicon 7%, manganese metal 8%, nickel powder 12%, ferrotungsten 5.5%, molybdenum-iron 7.5%, iron powder 30%; The weight coefficient of described medicine core is 34%.The diameter of described flux-cored wire is 2.5 millimeters.
Adopt roll built-up welding machine in stove, pinch roll to be carried out to built-up welding breathing out not, pinch roll is 350 DEG C in the temperature of breathing out in stove not, and the overlaying metal of built-up welding is 12 layers, and in weld deposit process, after 2 layers of every built-up welding, pinch roll is sent in annealing furnace, heated up with the speed of 50 DEG C per hour, at 350 DEG C, be incubated 1 hour, then continue to be warming up to 450 DEG C, be incubated 8 hours, and then put into and breathe out not stove, repeat follow-up built-up welding, before built-up welding, described fysed flux cures 3 hours at 350 DEG C;
In described annealing steps, pinch roll after built-up welding overlaying metal is placed in to annealing furnace, with the programming rate of 20 DEG C per hour, pinch roll is warming up to 340 DEG C, is incubated 3 hours, then continue to be warmed up to 500 DEG C with the speed of 20 DEG C per hour, be incubated 28 hours, close again annealing furnace, cool to pinch roll with the furnace room temperature, complete built-up welding and the heat treatment process on pinch roll surface.
Embodiment 4
Pinch roll manufacture and repair in surface overlaying and a heat treatment method, comprise rough turn, preheating, deposited metal, the step of annealing,
In described preheating step, first with the speed heating pinch roll of 30 DEG C of intensifications per hour, be incubated 2 hours after being heated to 320 DEG C, then continue to be warming up to 420 DEG C with the speed of 20 DEG C per hour, be incubated 9 hours;
Described deposited metal step comprises built-up welding transition metal process and built-up welding overlaying metal process,
In described built-up welding transition metal process, adopt the 18CrMo flux-cored wire purchased from Shanghai solder flux factory, buy rations from the HJ260 fysed flux of Shanghai solder flux factory and carry out built-up welding, the diameter of described 18CrMo flux-cored wire is 2.5 millimeters, the transition metal of described built-up welding is 3 layers, in stove, pinch roll is carried out to built-up welding partly breathing out not, pinch roll is 320 DEG C partly breathing out the not temperature of stove, welding current I=380～the 400A of built-up welding, weldingvoltage V=30～34V, before built-up welding, described fysed flux cures 2 hours at 310 DEG C;
In described built-up welding overlaying metal process, adopt flux-cored wire, buy rations from the HJ260 fysed flux of Shanghai solder flux factory and carry out built-up welding, described flux-cored wire, comprise carbon steel crust and medicine core, described carbon steel crust is H08A steel band, and the quality % of described medicine core raw material component is: chromic carbide iron 29%, ferrosilicon 7.5%, manganese metal 7.5%, nickel powder 11%, ferrotungsten 6.5%, molybdenum-iron 7.5%, iron powder 31%; The weight coefficient of described medicine core is 38%.The diameter of described flux-cored wire is 2.5 millimeters.The overlaying metal of built-up welding is 5 layers, in stove, pinch roll is carried out to built-up welding partly breathing out not, pinch roll is 310 DEG C partly breathing out not furnace temperature, welding current I=400～the 450A of built-up welding, weldingvoltage V=32～34V, and in weld deposit process, after 2 layers of every built-up welding, pinch roll is sent in annealing furnace, heated up with the speed of 50 DEG C per hour, at 310 DEG C, be incubated 1.5 hours, then continue to be warming up to 410 DEG C, be incubated 11 hours, and then put into half and breathe out not stove, repeat follow-up built-up welding, before built-up welding, described fysed flux cures 2 hours at 310 DEG C;
In described annealing steps, pinch roll after built-up welding overlaying metal is placed in to annealing furnace, with the programming rate of 10 DEG C per hour, pinch roll is warming up to 300 DEG C, be incubated 1 hour, then continue to be warmed up to 400 DEG C with the speed of 10 DEG C per hour, be incubated 8 hours, cool to pinch roll with the furnace room temperature again, complete built-up welding and the heat treatment process on pinch roll surface.
Embodiment 5
Pinch roll manufacture and repair in surface overlaying and a heat treatment method, comprise rough turn, preheating, built-up welding transition metal, built-up welding overlaying metal, the step of annealing,
In described preheating step, first with the speed heating pinch roll of 40 DEG C of intensifications per hour, be incubated 3 hours after being heated to 350 DEG C, then continue to be warming up to 450 DEG C with the speed of 40 DEG C per hour, be incubated 8 hours;
Described deposited metal step comprises built-up welding transition metal process and built-up welding overlaying metal process,
In described built-up welding transition metal process, adopt the 18CrMo flux-cored wire purchased from Shanghai solder flux factory, buy rations from the HJ260 fysed flux of Shanghai solder flux factory and carry out built-up welding, the diameter of described 18CrMo flux-cored wire is 2.5 millimeters.The transition metal of described built-up welding is 4 layers, in stove, pinch roll is carried out to built-up welding breathing out not, and pinch roll is 350 DEG C in the temperature of breathing out in stove not, and before built-up welding, described fysed flux cures 1 hour at 350 DEG C;
In described built-up welding overlaying metal process, adopt flux-cored wire, buy rations from the HJ260 fysed flux of Shanghai solder flux factory and carry out built-up welding, described flux-cored wire, comprises carbon steel crust and medicine core, described carbon steel crust is H08A steel band, the quality % of described medicine core raw material component is: chromic carbide iron 27%, ferrosilicon 6.5%, manganese metal 6.5%, nickel powder 11%, ferrotungsten 5%; Molybdenum-iron 7%, iron powder 37%; The weight coefficient of described medicine core is 37%.The diameter of described flux-cored wire is 2.5 millimeters.The overlaying metal of built-up welding is 7 layers, in stove, pinch roll is carried out to built-up welding breathing out not, pinch roll is 350 DEG C breathing out not furnace temperature, welding current I=400～the 450A of built-up welding, weldingvoltage V=32～34V, and in weld deposit process, after 2 layers of every built-up welding, pinch roll is sent in annealing furnace, heated up with the speed of 40 DEG C per hour, at 350 DEG C, be incubated 3 hours, then continue to be warming up to 450 DEG C, be incubated 8 hours, and then put into and breathe out not stove, repeat follow-up built-up welding, before built-up welding, described fysed flux cures 2 hours at 330 DEG C;
In described annealing steps, pinch roll after built-up welding overlaying metal is placed in to annealing furnace, with the programming rate of 40 DEG C per hour, pinch roll is warming up to 350 DEG C, be incubated 3 hours, then continue to be warmed up to 500 DEG C with the speed of 40 DEG C per hour, be incubated 15 hours, cool to pinch roll with the furnace room temperature again, complete built-up welding and the heat treatment process on pinch roll surface.
Embodiment 6
Pinch roll manufacture and repair in surface overlaying and a heat treatment method, comprise rough turn, preheating, deposited metal, the step of annealing,
In described preheating step, first with the speed heating pinch roll of 50 DEG C of intensifications per hour, be incubated 2 hours after being heated to 330 DEG C, then continue to be warming up to 380 DEG C with the speed of 50 DEG C per hour, be incubated 12 hours;
Described deposited metal step comprises built-up welding transition metal process and built-up welding overlaying metal process,
In described built-up welding transition metal process, adopt the 18CrMo flux-cored wire purchased from Shanghai solder flux factory, buy rations from the HJ260 fysed flux of Shanghai solder flux factory and carry out built-up welding, the diameter of described 18CrMo flux-cored wire is 2.5 millimeters.The transition metal of described built-up welding is 2 layers, in stove, pinch roll is carried out to built-up welding breathing out not, and pinch roll is 330 DEG C in the temperature of breathing out in stove not, and before built-up welding, described fysed flux cures 3 hours at 320 DEG C;
In described built-up welding overlaying metal process, adopt flux-cored wire, buy rations from the HJ260 fysed flux of Shanghai solder flux factory and carry out built-up welding, described flux-cored wire, comprise carbon steel crust and medicine core, described carbon steel crust is H08A steel band, and the quality % of described medicine core raw material component is: chromic carbide iron 30%, ferrosilicon 7%, manganese metal 8%, nickel powder 12%, ferrotungsten 6%, molybdenum-iron 8%, iron powder 29%; The weight coefficient of described medicine core is 36%.The diameter of described flux-cored wire is 2.5 millimeters.The overlaying metal of built-up welding is 4 layers, in stove, pinch roll is carried out to built-up welding breathing out not, pinch roll is 340 DEG C breathing out not furnace temperature, welding current I=400～the 450A of built-up welding, weldingvoltage V=32～34V, and in weld deposit process, after 2 layers of every built-up welding, pinch roll is sent in annealing furnace, heated up with the speed of 35 DEG C per hour, at 320 DEG C, be incubated 3 hours, then continue to be warming up to 400 DEG C, be incubated 12 hours, and then put into and breathe out not stove, repeat follow-up built-up welding, before built-up welding, described fysed flux cures 3 hours at 320 DEG C;
In described annealing steps, pinch roll after built-up welding overlaying metal is placed in to annealing furnace, with the programming rate of 35 DEG C per hour, pinch roll is warming up to 320 DEG C, be incubated 3 hours, then continue to be warmed up to 450 DEG C with the speed of 35 DEG C per hour, be incubated 30 hours, cool to pinch roll with the furnace room temperature again, complete built-up welding and the heat treatment process on pinch roll surface.
With the built-up welding overlaying metal in various embodiments of the present invention be 4～7 layers, the thickness that should ensure hardstanding is 7.5～9 millimeters.When built-up welding, pinch roll is placed on to half to be breathed out not stove or breathes out not stove (if notification number is CN2811899, the day for announcing: on August 30th, 2006, utility model name is called the not stove of Kazakhstan of " open-close type electric heating furnace for roller surfacing ") in be heated to 400～450 DEG C, be incubated 8～12 hours, rear employing roll built-up welding machine is (if notification number is CN2206175, the day for announcing: August 30 nineteen ninety-five, utility model name is called the built-up welder of " roll built-up welding machine ") pinch roll in stove is carried out to built-up welding welding, when welding, the interlayer temperature that should ensure surfacing layer metal is 320～350 DEG C.
Through follow-up processing the pinch roll that described in employing various embodiments of the present invention, method makes also needs,
Turning processing: first rough turn, finish turning subsequently, stays 1mm mill amount, and upper grinding machine is to figure paper size.
Detect: hardness detects, ensure hardness HRC55 ± 2 HRC, carry out ultrasonic examination and dye penetrant inspection, check and whether have crackle.
Do after dynamic balancing detection, can assemble by drawing, use on the machine.
Press above-mentioned steps to three batches that process, totally 30 pinch rolls detect, the hardness of pinch roll surface hardstanding all can reach 55HRC～57HRC, the equal flawless of pinch roll, the machinability of hardstanding is good, yield rate reaches 100%, pinch roll after processing, send machine test on hot rolling crimping machine scene, rolling high-alloy steel after upper machine, reaches 6 wheat harvesting periods service time, steel rolling amount reaches more than 1,000,000 tons, the pinch roll on probation to upper machine carries out Site Detection, occurs yet obviously sticky meat, and crackle and surface local such as peel off at the mass defect.
Claims (9)
- Pinch roll manufacture and repair in surface overlaying and a heat treatment method, comprise rough turn, preheating, deposited metal, the step of annealing, is characterized in that:In described preheating step, first be less than or equal to the speed heating pinch roll of 50 DEG C with intensification per hour, after being heated to 300～350 DEG C, be incubated 1.5～3 hours, then be less than or equal to the speed of 50 DEG C with intensification per hour and continue to be warming up to 380～450 DEG C, be incubated 8～12 hours;In described deposited metal step, adopt flux-cored wire to join HJ260 fysed flux and carry out built-up welding, the metal of built-up welding is 4～12 layers, thickness is 10～30 millimeters, the interlayer temperature of surfacing layer metal is 320～350 DEG C, wherein, described flux-cored wire comprises carbon steel crust and medicine core, and the quality % of described medicine core raw material component is: chromic carbide iron 26～30%, ferrosilicon 6.0～7%, manganese metal 6.0～8%, nickel powder 10～12%, ferrotungsten 4.0～6%, molybdenum-iron 6.0～8%, surplus is iron powder, and the quality coefficient of described medicine core is 34～38%;In described annealing steps, pinch roll after deposited metal is placed in to annealing furnace, with the programming rate that is less than or equal to 50 DEG C per hour, pinch roll is warming up to 300～350 DEG C, be incubated 1.5～3 hours, then continue to be warmed up to 450～500 DEG C with the programming rate that is less than or equal to 50 DEG C per hour, be incubated 15～30 hours, cool to pinch roll with the furnace room temperature again.
- 2. surface overlaying and the heat treatment method in a kind of pinch roll manufacture according to claim 1 and reparation, it is characterized in that: in described deposited metal step, after 2 layers of every built-up welding, pinch roll is sent in annealing furnace, heat up with the speed that is less than or equal to 50 DEG C per hour, while being warming up to 300～350 DEG C, be incubated 1～3 hour, then continue to be warming up to 400～450 DEG C with the programming rate that is less than or equal to 50 DEG C per hour, be incubated 8～12 hours, and then pinch roll is put into half and breathe out not stove or breathe out not stove, repeat follow-up built-up welding.
- 3. surface overlaying and the heat treatment method in a kind of pinch roll manufacture according to claim 1 and reparation, it is characterized in that: in described deposited metal step, the quality % of described medicine core raw material component is: chromic carbide iron 28%, ferrosilicon 7.0%, manganese metal 7.0%, nickel powder 12%, ferrotungsten 6.0%, molybdenum-iron 8.0%, iron powder 32%; The weight coefficient of described medicine core is 36%.
- 4. surface overlaying and the heat treatment method in a kind of pinch roll manufacture according to claim 1 and reparation, it is characterized in that: in described annealing steps, pinch roll after deposited metal is placed in to annealing furnace, with the programming rate of 50 DEG C per hour, pinch roll is warming up to 300 DEG C, is incubated 2 hours, then continue to be warmed up to 480 DEG C with the speed of 50 DEG C per hour, be incubated 24 hours, then cool to pinch roll with the furnace room temperature.
- 5. surface overlaying and the heat treatment method in a kind of pinch roll manufacture according to claim 1 and 2 and reparation, is characterized in that: in described deposited metal step process, adopt roll built-up welding machine to carry out built-up welding.
- Pinch roll manufacture and repair in surface overlaying and a heat treatment method, comprise rough turn, preheating, deposited metal, the step of annealing, is characterized in that:In described preheating step, first be less than or equal to the speed heating pinch roll of 50 DEG C with intensification per hour, after being heated to 300～350 DEG C, be incubated 1.5～3 hours, then be less than or equal to the speed of 50 DEG C with intensification per hour and continue to be warming up to 380～450 DEG C, be incubated 8～12 hours;Described deposited metal step comprises built-up welding transition metal process and built-up welding overlaying metal process,In built-up welding transition metal process, adopt 18CrMo flux-cored wire, join HJ260 fysed flux and carry out built-up welding, welding current I=380～the 400A of built-up welding, weldingvoltage V=30～34V, partly breathing out not stove or breathe out not, in stove, pinch roll is carried out to built-up welding, the transition metal of built-up welding is 2～4 layers, and thickness is 4～10 millimeters;In built-up welding overlaying metal process, adopt flux-cored wire, join HJ260 fysed flux and carry out built-up welding, welding current I=400～the 450A of built-up welding, weldingvoltage V=32～34V, partly breathing out not stove or breathe out not, in stove, pinch roll is carried out to built-up welding, the overlaying metal of built-up welding is 4～7 layers, thickness is 10～25 millimeters, wherein, after 2 layers of every built-up welding, pinch roll is sent in annealing furnace, heat up with the speed that is less than or equal to 50 DEG C per hour, while being warming up to 300～350 DEG C, be incubated 1～3 hour, then continue to be warming up to 400～450 DEG C with the programming rate that is less than or equal to 50 DEG C per hour, be incubated 8～12 hours, and then pinch roll is put into half and breathe out not stove or breathe out not stove, repeat follow-up built-up welding, described flux-cored wire comprises carbon steel crust and medicine core, the quality % of described medicine core raw material component is: chromic carbide iron 26～30%, ferrosilicon 6.0～7%, manganese metal 6.0～8%, nickel powder 10～12%, ferrotungsten 4.0～6%, molybdenum-iron 6.0～8%, surplus is iron powder, the quality coefficient of described medicine core is 34～38%,In described annealing steps, pinch roll after deposited metal is placed in to annealing furnace, with the programming rate that is less than or equal to 50 DEG C per hour, pinch roll is warming up to 300～350 DEG C, be incubated 1.5～3 hours, then continue to be warmed up to 450～500 DEG C with the programming rate that is less than or equal to 50 DEG C per hour, be incubated 15～30 hours, cool to pinch roll with the furnace room temperature again.
- 7. surface overlaying and the heat treatment method in a kind of pinch roll manufacture according to claim 6 and reparation, it is characterized in that: in described built-up welding transition metal process and built-up welding overlaying metal process, before built-up welding, described fysed flux cures 1～3 hour at 300～350 DEG C.
- 8. surface overlaying and the heat treatment method in a kind of pinch roll manufacture according to claim 6 and reparation, is characterized in that:In described built-up welding transition metal process, the transition metal of described built-up welding is 3 layers, and the interlayer temperature of surfacing layer metal is 320～350 DEG C, and before built-up welding, described fysed flux cures 2 hours at 350 DEG C;In described built-up welding overlaying metal process, the overlaying metal of built-up welding is 5 layers, and the interlayer temperature of surfacing layer metal is 320～350 DEG C, and in weld deposit process, after 2 layers of every built-up welding, pinch roll is sent in annealing furnace, heated up with the speed of 50 DEG C per hour, at 300 DEG C, be incubated 2 hours, then continue to be warming up to 420 DEG C, be incubated 10 hours, and then put into and breathe out not stove, repeat follow-up built-up welding, before built-up welding, described fysed flux cures 2 hours at 350 DEG C.
- 9. surface overlaying and the heat treatment method according to a kind of pinch roll manufacture described in claim 6 or 8 and in repairing, is characterized in that: in described built-up welding transition metal process and built-up welding overlaying metal process, adopt roll built-up welding machine to carry out built-up welding.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210231309.2A CN102744496B (en) | 2012-07-05 | 2012-07-05 | Surface overlaying and processing method for pinch roller manufacturing and repairing |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210231309.2A CN102744496B (en) | 2012-07-05 | 2012-07-05 | Surface overlaying and processing method for pinch roller manufacturing and repairing |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN102744496A CN102744496A (en) | 2012-10-24 |
| CN102744496B true CN102744496B (en) | 2014-08-13 |
Family
ID=47025182
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201210231309.2A Expired - Fee Related CN102744496B (en) | 2012-07-05 | 2012-07-05 | Surface overlaying and processing method for pinch roller manufacturing and repairing |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN102744496B (en) |
Families Citing this family (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102941394B (en) * | 2012-11-15 | 2015-04-01 | 武汉船用机械有限责任公司 | Method for overlaying welding of duplex stainless steel |
| CN103230964B (en) * | 2013-05-07 | 2015-09-30 | 太原市冶金机械厂 | Hot continuous rolling steel winding machine top pinch roll and preparation method thereof |
| CN103521944B (en) * | 2013-09-27 | 2016-01-20 | 武汉光谷机电科技有限公司 | A kind of stainless sheet steel laser weld packing material and preparation method thereof |
| CN105499751B (en) * | 2015-12-28 | 2018-02-13 | 湖北万安通复合再制造科技有限公司 | Hard-face overlaying welding renovation technique for hot continuous rolling pinch roll |
| CN108161331A (en) * | 2017-12-27 | 2018-06-15 | 安徽应流航源动力科技有限公司 | A kind of welding Rework Technics method of ZG1Cr11Ni2WMoV large sizes casing casting |
| CN111618472B (en) * | 2020-06-01 | 2022-02-18 | 鞍钢附企三炼钢修造总厂 | Bottoming layer submerged arc flux-cored wire for repairing zero-section continuous casting roller of continuous casting machine |
| CN115609188B (en) * | 2022-11-11 | 2025-02-14 | 山东聚力焊接材料有限公司 | A surfacing flux-cored welding wire and its preparation method and welding method |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1230473A (en) * | 1998-03-29 | 1999-10-06 | 王树敏 | Roll with bead welded layer on the surface and its manufacture and repair method |
| CN101829879A (en) * | 2010-04-15 | 2010-09-15 | 张子益 | Method for restoring roll body of steel casting roll of twin-roll strip casting |
| CN102139421A (en) * | 2010-02-02 | 2011-08-03 | 北京赛亿科技股份有限公司 | Self-shielded metal cored surfacing welding rod as bottom coating in cold rolling backup roll repairing process |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO1997005984A1 (en) * | 1995-08-07 | 1997-02-20 | Westinghouse Electric Corporation | High chromium content welding material to improve resistance of corrosion |
| JP2002144079A (en) * | 2000-11-10 | 2002-05-21 | Hitachi Ltd | Repair method of heat resistant member and repair method of gas turbine |
-
2012
- 2012-07-05 CN CN201210231309.2A patent/CN102744496B/en not_active Expired - Fee Related
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1230473A (en) * | 1998-03-29 | 1999-10-06 | 王树敏 | Roll with bead welded layer on the surface and its manufacture and repair method |
| CN102139421A (en) * | 2010-02-02 | 2011-08-03 | 北京赛亿科技股份有限公司 | Self-shielded metal cored surfacing welding rod as bottom coating in cold rolling backup roll repairing process |
| CN101829879A (en) * | 2010-04-15 | 2010-09-15 | 张子益 | Method for restoring roll body of steel casting roll of twin-roll strip casting |
Non-Patent Citations (1)
| Title |
|---|
| JP特开2002-144079A 2002.05.21 |
Also Published As
| Publication number | Publication date |
|---|---|
| CN102744496A (en) | 2012-10-24 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN102744496B (en) | Surface overlaying and processing method for pinch roller manufacturing and repairing | |
| CN102728993B (en) | Method for repairing roller sleeve of continuous casting roller | |
| CN103418923B (en) | Overlaying repair method for worn roller | |
| CN108381027B (en) | Vacuum welding device for preparing high-carbon-equivalent super-thick steel plate and preparation method thereof | |
| CN105436665A (en) | Surfacing reconstructed layer of large hot-rolled supporting roll Cr4 and method for repairing roll | |
| CN101722384A (en) | Flux-cored wire and method for welding cold-rolled back-up roll by same | |
| CN105127205B (en) | Large-scale bushing roll for producing strip and preparation method thereof | |
| CN109693026B (en) | Combined surfacing method for excircle large-area stellite alloy hardfacing | |
| CN101722383A (en) | Flux-cored wire and method for welding cold-rolled work roll by same | |
| CN104404510B (en) | Method for restoring cold roll through preparing gradient coating via laser cladding | |
| CN109128436A (en) | A kind of process of the built-up welding aluminium bronze on steel | |
| CN101104180A (en) | Technology for repairing semi-steel roller with flux-core welding wire built-up welding | |
| CN105478962A (en) | Overlaying rebuilt layer for large cold-rolled supporting roll 70 Cr3Mo and method for repairing roll | |
| CN101402152B (en) | Steel-smelting revolving furnace smoke canal weld deposit process | |
| CN107598351A (en) | The cylindrical large area plasma overlaying method of Stellite cobalt-base alloys | |
| CN106735760A (en) | A kind of welding procedure of 15CrMo heat-resisting alloy steels | |
| CN105215510A (en) | The overlaying method of repair cold-rolling flat support roller | |
| CN101658986A (en) | Build-up welding rod for repairing Cr3 roller and build-up welding method | |
| CN101722385A (en) | Flux-cored wire and method for welding hot-rolled back-up roll by same | |
| CN102744533B (en) | A kind of pinch roll flux-cored wire | |
| CN107717259A (en) | Composite manufacturing by hard surfacing pinch roll, the capping resurfacing welding material of Wrapping Roll roll surface and technique | |
| CN113579417A (en) | Defect welding and heat treatment method for heat-resistant steel casting | |
| CN115110076B (en) | A method for ultra-high-speed laser cladding of ductile iron shaft parts | |
| CN102974917B (en) | Stellite alloy bead weld method of gas turbine combustion chamber | |
| CN102837116A (en) | Overlaying welding repairing technology of stainless steel cold-rolled bearing roller |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| 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: 20140813 Termination date: 20180705 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |