A preparation process of isothermally solidified large liner

Abstract

The invention relates to a preparation technology of an isothermal solidification large lining board. Isothermal solidification of the large lining board is achieved through setting cooling solidification intervention conditions, and a built-in chilling block is placed in the position, with the maximum thickness, of the large lining board. The preparation technology comprises the steps of firstly, calculating to acquire mass of the built-in chilling block; then, confirming shape and size of the built-in chilling block based on principle that heat conducting speeds in all directions in a mold cavity are the same and the principle that heat energy in the minimum size direction can meet the melting requirement of the chilling block, and calculating to acquire shape and size of the built-in chilling block and placing position of the built-in chilling block; manufacturing the built-in chilling block, and stably placing the built-in chilling block in the mold cavity; and casting molten steel with qualified components, so as to achieve isothermal solidification of the large lining board. According to the preparation technology, internal and external components of the large lining plate are guaranteed uniform, core feeding is sufficient, and microdefects are less.

Description

technical field [0001] The invention relates to the technical field of materials, in particular to a preparation process for isothermally solidified large-scale liners. Background technique [0002] With the development of the mining industry, the crushing and grinding equipment in the mining industry is becoming more and more large-scale, and at the same time, the liner materials for the crushing and grinding equipment are also becoming larger and thicker. The increase in size and thickness of the liner puts forward higher and stricter requirements for its manufacturing process. During the solidification process of the large lining plate, due to the large amount of molten steel in a single structure, the crystallization releases more heat energy, and a large amount of heat energy is easily accumulated at the position with a large wall thickness due to the poor heat conduction effect, and the crystallization speed is slow. Rapid diffusion in the metal, and rapid accumulatio...

AI Technical Summary

Problems solved by technology

During the solidification process of the large lining plate, due to the large amount of molten steel in a single structure, the crystallization releases more heat energy, and a large amount of heat energy is easily accumulated at the position with a large wall thickness due to the poor heat conduction effect, and the crystallization speed is slow. Rapid diffusion in the metal, rapid accumulation at the front end of the crystallization line in the core of the liner, resulting in the loss of beneficial ingredients in the core of the liner after solidification

At the same time, in terms of time sequence, due to the post-crystallization and solidification of the core of the liner, the solidification shrinkage is that the liquid steel replenishment channel is blocked by the external structure that is preferentially solidified, and it is easy to cause looseness and microscopic holes in the core of the liner.

It directly affects the structure and performance of the core of the lining board, and the macro performance is poor wear resistance of the core of the lining board

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