Repaired roller and method for repairing roller

A roll and roll surface technology, which is applied in the field of iron and steel production equipment, can solve the problems of increasing production costs, limiting the service life of rolls, and poor mechanical properties of rolls, and achieves the effects of increasing service life, improving mechanical properties, and uniform hardness

Inactive Publication Date: 2008-08-27
ANHUI UNIVERSITY OF TECHNOLOGY +1
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Problems solved by technology

[0003] At present, the repair method of the roll generally adopts the process of surfacing welding, and a lot of work needs to be prepared before welding, such as annealing of the roll blank, machining of the roll to be surfacing, coloring flaw detection treatment, preheating treatment, and at the same time, the ba

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  • Repaired roller and method for repairing roller
  • Repaired roller and method for repairing roller

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Embodiment Construction

[0017] like figure 1 In the process, the waste roll that cannot be used after wear and tear is firstly cut off the wear layer along the outer surface of the roll by mechanical cutting method to obtain a roll core 2, and then the cladding agent coating material similar to or consistent with the base material is selected and sprayed On the surface of the roller core, it is melted together with a thin layer by laser irradiation to form a cladding layer 1 .

[0018] like figure 2 Among them, the laser cladding layer 1 is divided into a cladding surface layer 3 , a cladding middle layer 4 , and a cladding bottom layer 5 . The spot diameter during laser cladding is generally 5-15 mm, so the cladding surface can be regarded as a semi-infinite plane. The high-power laser beam irradiates the surface of the cladding layer with a constant power P, and moves along the direction of the roll body at a constant speed v. At the same time, the powder is directly fed into the molten pool by...

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Abstract

The invention relates to a repaired roller and a method for repairing a roller. The method comprises the following steps of: mechanically cutting the waste roller to be repaired along the external surface to remove a worn layer to obtain a roller core, arranging selected cladding material on the surface of the roller core by different addition manners, and irradiating with laser to melt the cladding material together with the surface of the roller to form a cladding layer. The laser cladding layer consists of a cladding surface layer, a cladding intermediate layer and a laser cladding bottom layer and can form gradual functional materials with respective characteristics. The repaired roller has improved mechanical performance, prolonged service life and lowered production cost.

Description

technical field [0001] The invention relates to iron and steel production equipment, in particular to a repaired roll and a method for repairing the roll. Background technique [0002] In steel rolling production, since the roll is the main processing part that directly contacts the rolled piece and forces the rolled piece to undergo plastic deformation, it must bear a large dynamic pressure, a large sliding speed between metals and a large bending stress, and To bear the impact of high temperature with large changes, the roll will be continuously worn during use. When the roll is worn to a certain extent, it must be repaired because it can no longer be used. [0003] At present, the repair method of rolls generally adopts the process of surfacing welding, and a lot of work needs to be prepared before welding, such as annealing treatment of roll blanks, machining of rolls to be surfacing, coloring flaw detection treatment, preheating treatment, and at the same time the base ...

Claims

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Application Information

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IPC IPC(8): B21B27/02B32B33/00B23P6/00C23C24/08
Inventor 黄贞益吴胜李长宏程丙贵王道远李翔李黎明
Owner ANHUI UNIVERSITY OF TECHNOLOGY
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