CN103602980A

CN103602980A - Method for laser restoration on worn finishing roller

Info

Publication number: CN103602980A
Application number: CN201310624264.XA
Authority: CN
Inventors: 黄金荣; 范银芳
Original assignee: YINXIN ROLLER CO Ltd HUZHOU
Current assignee: YINXIN ROLLER CO Ltd HUZHOU
Priority date: 2013-12-02
Filing date: 2013-12-02
Publication date: 2014-02-26

Abstract

The invention relates to a method for laser restoration on a worn finishing roller. The method comprises the following steps of 1, detecting a worn position and wear extent of a finishing roller, 2, carrying out radial and end face run-out examination on the finishing roller to be restored, 3, removing a fatigue layer on the worn position of the finishing roller, 4, detecting a material, components and a hardness parameter of the finishing roller and preparing metal alloy powder, 5, carrying out laser cladding on the worn position of the finishing roller, 6, carrying out machining on the worn position subjected to the laser cladding, 7, carrying out surface coloration flaw detection on the processed finishing roller, 8, carrying out heat treatment on the finishing roller subjected to the cladding, and 9, carrying out checking and examination on a processing precision and hardness of the restored finishing roller, coating the qualified finished product with anti-rust oil and carrying out packaging. The method realizes restoration on the worn finishing roller, effectively improves toughness and wear resistance of the finishing roller and prolongs the service life of the finishing roller.

Description

Laser repair method after a kind of finished roll wearing and tearing

Technical field

The present invention relates to the laser repair method after a kind of finished roll wearing and tearing.

Background technology

In leader mill parts, the working conditions of finished roll is the most complicated.In the preparatory process of finished roll before manufacturing and using, can produce unrelieved stress and thermal stresses.During use, be further subject to again the effect of various cyclic stresses, included bending, torsion, shearing, contact stress and thermal stresses etc.These stress are inhomogeneous, continuous variations along the distribution of the body of roll, and its reason not only has the factor in design, also has the continuous variation of in use wearing and tearing of finished roll, temperature and roll forming simultaneously.In addition, rolling condition often there will be abnormal conditions, and roll is cooling improper after use, also can be subject to the infringement of thermal stresses, so various local damages and surface damages such as finished roll, except wearing and tearing, also often occurs crackle, ruptures, peels off, impressions.Because finished roll is as last one critical process of rolling, so wearing and tearing of finished roll, can directly have influence on quality and the outward appearance of product, be rolled section bar temperature near the lower limit in rolling temperature simultaneously, therefore, operating mode is more severe, just higher to the requirement of finished roll, thereby causes the consumption of roll larger.

Summary of the invention

For problems of the prior art, the object of the present invention is to provide the technical scheme of the laser repair method after a kind of finished roll wearing and tearing.

Laser repair method after described a kind of finished roll wearing and tearing, is characterized in that each components based on weight percentage of this finished roll is: C:2.5%-3.5%; Si:< 2.0%; Mn:1.6%-2.0%; P :≤0.06%; S :≤0.05%; Cu :≤0.2%; As :≤0.10%; Cr:1.5%-2.0%; Ni:10.0%-20.0%; Mo:10.5%-15.0%; All the other are Fe and impurity; Laser repair method after these finished roll wearing and tearing is as follows: 1) detect finished roll damage location and abrasion loss thereof; 2) to finished roll carry out radially, face runout check; 3) finished roll of repairing is removed to the fatigue layer of damage location; 4) detect material, composition and the hardness parameter configuration metal alloy powders of finished roll mother metal; 5) adjust laser operation data and setting laser melting and coating technique parameter, finished roll damage location is carried out to laser melting coating; 6) to after the cladding of finished roll damage location, carry out mechanical workout; 7) finished roll after processing is carried out to surface colour carrying out flaw detection; 8) finished roll after cladding is heat-treated; 9) finished roll working accuracy, hardness after repairing are checked, checked, qualified finished product is coated with to slushing oil, packing.

Laser repair method after described a kind of finished roll wearing and tearing, is characterized in that described removal finished roll damage location fatigue layer thickness is 0.5-2mm.

Laser repair method after described a kind of finished roll wearing and tearing, is characterized in that described thermal treatment in electric furnace that finished roll is placed on is heated to 520 ℃-550 ℃, be incubated 6 hours after power-off, naturally cool to 150 ℃ and come out of the stove below.

Laser repair method after described a kind of finished roll wearing and tearing, is characterized in that described each components based on weight percentage of finished roll is: C:2.7%-3.3%; Si:< 1.9; Mn:1.7%-1.9%; P :≤0.055%; S :≤0.045%; Cu :≤0.19%; As :≤0.09%; Cr:1.6%-1.9%; Ni:12.0%-18.0%; Mo:11.0 %-14.5%; All the other are Fe and impurity.

Finished roll after the present invention damages by laser repairing, has solved a difficult problem of repairing the finished roll after damage, has effectively strengthened toughness and the wear resistance of finished roll, has extended the work-ing life of finished roll.The present invention is conducive to reduce costs, reduce resource and energy expenditure, the pollution of minimizing to environment, is the important technology approach of Sustainable Development of Enterprises.

Embodiment

Laser repair method after finished roll wearing and tearing of the present invention, each components based on weight percentage of this finished roll is: C:2.5%-3.5%; Si:< 2.0%; Mn:1.6%-2.0%; P :≤0.06%; S :≤0.05%; Cu :≤0.2%; As :≤0.10%; Cr:1.5%-2.0%; Ni:10.0%-20.0%; Mo:10.5%-15.0%; All the other are Fe and impurity; Laser repair method after these finished roll wearing and tearing is as follows: 1) detect finished roll damage location and abrasion loss thereof; 2) to finished roll carry out radially, face runout check; 3) finished roll of repairing is removed to the fatigue layer of damage location; 4) detect material, composition and the hardness parameter configuration metal alloy powders of finished roll mother metal; 5) adjust laser operation data and setting laser melting and coating technique parameter, finished roll damage location is carried out to laser melting coating; 6) to after the cladding of finished roll damage location, carry out mechanical workout; 7) finished roll after processing is carried out to surface colour carrying out flaw detection; 8) finished roll after cladding is heat-treated; 9) finished roll working accuracy, hardness after repairing are checked, checked, qualified finished product is coated with to slushing oil, packing.

Above-mentioned removal finished roll damage location fatigue layer thickness is 0.5-2mm; Finished roll is placed on to thermal treatment in electric furnace and is heated to 520 ℃-550 ℃, be incubated 6 hours after power-off, naturally cool to 150 ℃ and come out of the stove below.

As preferably, each components based on weight percentage of finished roll is: C:2.7%-3.3%; Si:< 1.9; Mn:1.7%-1.9%; P :≤0.055%; S :≤0.045%; Cu :≤0.19%; As :≤0.09%; Cr:1.6%-1.9%; Ni:12.0%-18.0%; Mo:11.0 %-14.5%; All the other are Fe and impurity.

Claims

1. the laser repair method after finished roll wearing and tearing, is characterized in that each components based on weight percentage of this finished roll is: C:2.5%-3.5%; Si:< 2.0%; Mn:1.6%-2.0%; P :≤0.06%; S :≤0.05%; Cu :≤0.2%; As :≤0.10%; Cr:1.5%-2.0%; Ni:10.0%-20.0%; Mo:10.5%-15.0%; All the other are Fe and impurity; Laser repair method after these finished roll wearing and tearing is as follows: 1) detect finished roll damage location and abrasion loss thereof; 2) to finished roll carry out radially, face runout check; 3) finished roll of repairing is removed to the fatigue layer of damage location; 4) detect material, composition and the hardness parameter configuration metal alloy powders of finished roll mother metal; 5) adjust laser operation data and setting laser melting and coating technique parameter, finished roll damage location is carried out to laser melting coating; 6) to after the cladding of finished roll damage location, carry out mechanical workout; 7) finished roll after processing is carried out to surface colour carrying out flaw detection; 8) finished roll after cladding is heat-treated; 9) finished roll working accuracy, hardness after repairing are checked, checked, qualified finished product is coated with to slushing oil, packing.

2. the laser repair method after a kind of finished roll wearing and tearing according to claim 1, is characterized in that described removal finished roll damage location fatigue layer thickness is 0.5-2mm.

3. the laser repair method after a kind of finished roll wearing and tearing according to claim 1, is characterized in that described thermal treatment in electric furnace that finished roll is placed on is heated to 520 ℃-550 ℃, be incubated 6 hours after power-off, naturally cool to 150 ℃ and come out of the stove below.

4. the laser repair method after a kind of finished roll wearing and tearing according to claim 1, is characterized in that described each components based on weight percentage of finished roll is: C:2.7%-3.3%; Si:< 1.9; Mn:1.7%-1.9%; P :≤0.055%; S :≤0.045%; Cu :≤0.19%; As :≤0.09%; Cr:1.6%-1.9%; Ni:12.0%-18.0%; Mo:11.0 %-14.5%; All the other are Fe and impurity.