Method for manufacturing large profile universal rolling mill horizontal roller through laser

Abstract

The invention discloses a method for manufacturing a large profile universal rolling mill horizontal roller through laser. The method comprises the following steps: turning a graphite steel or spheroidal graphite cast iron material with high strength and toughness into a large profile universal rolling mill horizontal roller through laser substrate with a reserved certain laser cladding size and deoiling and derusting the large profile universal rolling mill horizontal roller under the room temperature; selecting nickel-based alloy powder with high wear resistance, high corrosion resistance and high metallurgical compatibility the substrate, adjusting an automatic powder feeding device and enabling alloy powder out of an automatic powder feeding head to just fall into a laser cladding tank; automatically feeding the alloy powder into the laser cladding tank by using a synchronous powder feeding device, feeding high-power focused laser beams and the automatic powder feeding head along an axial direction, rotating the large profile universal rolling mill horizontal roller according to a set rotation rate and forming a uniform and dense laser cladding layer on the external surface of the horizontal roller; and carrying out subsequent heat treatment by slowly cooling the horizontal roller after broadband laser cladding of the nickel-based alloy, fully wrapping the horizontal roller body by using heat preservation cotton, and distressing and annealing the horizontal roller under the room temperature.

Description

technical field [0001] The invention relates to a process method for manufacturing metallurgical parts, in particular to a method for laser manufacturing a horizontal roll of a large profile universal rolling mill. Background technique [0002] The horizontal roll of a large-scale profile universal rolling mill is one of the most important equipment in the rolling production process, and its life span directly affects whether the rolling can keep running smoothly, obtain high production and reduce costs. The horizontal roll of the large-scale profile universal rolling mill is a composite structure, which is assembled together by a roll ring and a roll shaft by a hot-loading method, so that the roll shaft can be reused. Roll rings are generally made of composite materials, and the outer layer is made of high-wear-resistant high-carbon semi-steel, high-chromium cast iron, or even high-speed steel. It is produced by centrifugal casting technology, which can ensure sufficient th...

AI Technical Summary

Problems solved by technology

The working environment of the horizontal roll of the universal rolling mill is very harsh, and it is directly subjected to the friction and wear, thermal fatigue and thermal corrosion of the red hot billet at high temperature, which leads to the failure of the horizontal roll

In addition to causing great losses to production work, the failure of horizontal rollers also brings many difficulties to actual production operations

[0003] At present, the centrifugal casting process generally adopted in my country to manufacture horizontal rolls of large-scale universal rolling mills, although this method can meet the thickness of the working layer of the horizontal rolls of large-scale universal rolling mills, the products produced by centrifugal casting have rough free surfaces and large dimensional errors. The quality is poor, there are many pores and slag inclusions, so it is necessary to increase the machining allowance, and it is not suitable for pouring alloys that are prone to specific gravity segregation