Method of manufacturing composite roller by use of vacuum-state explosive welding technology
A technology of explosive welding and composite rolls, which is applied in welding equipment, manufacturing tools, non-electric welding equipment, etc., can solve the problems of arc closing cracks on the surface of surfacing rolls, centrifugal casting segregation, and high manufacturing costs, so as to reduce harmful oxides The production, improve the life of the roll, the effect of good hardness consistency
Inactive Publication Date: 2018-10-02
TAIYUAN IRON & STEEL GROUP
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Problems solved by technology
The traditional roll manufacturing and repairing methods all adopt surface surfacing welding and centrifugal casting process. These processes have developed to the present, but there are still some inherent defects and deficiencies in the process itself. For example, the surface of the surfacing roll is prone to arc cracks due to welding, Pores, centrifugal casting is prone to segregation, cracks and other problems, and the manufacturing cost is relatively high
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[0051] see figure 2 , taking the manufacture of continuous casting rolls with a diameter of φ150 as an example to describe. First, the outer roller sleeve 2 can be selected as 3Cr13 stainless steel with a wall thickness of 4mm, and the material of the roller core 1 can be selected as 42CrMo. As mentioned above, the roller core 1 can also be called the base material, and the outer roller sleeve 2 can be called the composite material.
[0052] The next step is to perform a smooth pretreatment on the combined surface of the base material and the composite material. For example, 100% or all of the combined surface of the base material and the composite material should be derusted and ground to make the surface roughness Ra≤6.3μm.
[0053] In the next step, the outer roller sleeve 2 and the inner roller core 1 are assembled together, and then as image 3 As shown, the assembled component 12 is placed in the vacuum chamber 11 and placed on the wooden base 13 , so that the base m...
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Abstract
The invention discloses a method of manufacturing a composite roller by use of a vacuum-state explosive welding technology. The method comprises the steps that (a) a roller sleeve and a roller core are selected, wherein the roller sleeve and the roller core are made of different materials; (b) after the roller sleeve and the roller core are assembled together, special low-detonation-velocity explosives are uniformly arranged on the exterior of the roller sleeve; (c) an assembly which is formed by the roller sleeve and the roller core and processed by explosive arrangement is put in a vacuum state to be subjected to explosion composition, and the roller sleeve and the roller core can be welded together, so that a composite roller blank is formed; (d) the explosion composition quality is inspected; and (e) quenching and tempering thermal treatment are conducted on the composite roller blank which passes inspection and is formed by the roller sleeve and the roller core. Compared with a roller build up welding processing method, the composite roller manufactured by use of the vacuum-state explosive welding technology has the advantages that the processing efficiency can be improved, the cost can be reduced, the performance and the surface hardness uniformity of the roller can be improved, and the service life of the roller can be prolonged. The method of manufacturing the compositeroller by use of the vacuum-state explosive welding technology can be used for manufacturing various rollers such as continuous casting rollers, laminar flow cooling rollers and clamping rollers.
Description
technical field [0001] The invention relates to the field of explosive processing of metal composite materials, in particular to a method for manufacturing composite rolls by using vacuum state explosive welding technology. Background technique [0002] Various rolls, such as continuous casting rolls, laminar cooling rolls, nip rolls, etc., are important components in steel production enterprises. The traditional roll manufacturing and repairing methods all adopt surface surfacing welding and centrifugal casting processes. These processes have developed to the present, and there are still some inherent defects and deficiencies in the process itself. For example, the surface of the surfacing roll is prone to arc cracks due to welding, Centrifugal casting is prone to problems such as segregation and cracks, and the manufacturing cost is relatively high. [0003] Therefore, there is a need for a method of manufacturing composite rolls that overcomes or alleviates the above-men...
Claims
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IPC IPC(8): B23K20/08
CPCB23K20/08
Inventor 刘建伟梁建军王海峰康杏宏王俊山杨国俊王虎成王峰王强达郝枝平
Owner TAIYUAN IRON & STEEL GROUP
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