Cast steel roller thermal connection device and using method thereof

Abstract

The invention provides a cast steel roller thermal connection device and a using method thereof. The cast steel roller thermal connection device comprises a to-be-connected roller (1) and a clamping tool (2), wherein the to-be-connected roller is fixedly clamped inside the clamping tool, the clamping tool is clamped below a roller neck of the thermal connection end of the to-be-connected roller, annular dry sand (3) is laid between the to-be-connected roller and the top end surface of the clamping tool, and molding sand (4) is arranged outside the annular dry sand (3); a casting mold (5) is arranged at the upper end of the molding sand (4), and the casting mold (5) is also arranged at the upper end of the to-be-connected roller (1) in a sleeving mode; an auxiliary clamping tool (8) is arranged outside the casting mold (5); and a thermal connection material (6) and an ignition material (7) are arranged above the portion, in the casting mold (5), of the to-be-connected roller (1). By means of the cast steel roller thermal connection device and the using method thereof, the obtained thermally-connected new roller has the advantages that the structure is compact, the performance is thesame as that of a raw material, and a connecting point has higher tensile strength.

Description

technical field [0001] The invention relates to the field of thermal processing and casting, in particular to a cast steel roll thermal bonding device and a method for using the same. Background technique [0002] Cast steel rolls refer to cast steel rolls with a carbon content of 0.4% to 2.1%. According to Chinese classification habits, hypereutectoid cast steel rolls with a carbon content higher than 1.3% are divided into semi-steel rolls and graphite steel rolls according to their structural characteristics; the main carbide in the outer layer of the roll is Cr 7 C 3 It is sometimes called high chromium steel roll. [0003] Static (conventional method) casting cast steel rolls widely use combined vertical casting molds (see the figure below). Metal mold or sand lining (10-30mm) metal mold is used for the roller body. The outer structure of the cast steel roll cast by metal mold is fine and dense. The inner surface of the metal mold is coated with refractory paint, an...

AI Technical Summary

Problems solved by technology

However, there are still many rolls whose shape and size are restricted by the casting process, or the size of the loss is not enough during the casting process. For this type of casting, if it cannot be recycled, it will be treated as waste, which consumes a lot of manpower and material resources.

During the use of castings, the size of the roll castings is often inappropriate due to different use requirements. The longer ones can be cut off, and the shorter ones can only be connected with suitable target weldments by welding.

However, the current welding not only has low strength of welded joints and poor tensile properties, but also it is difficult to find suitable weldments for welding

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