Xingnong brings you an analysis of the heat treatment process of high manganese steel linings for ball mill accessories

The heat treatment process of high manganese steel lining plate of ball mill is analyzed from the processing technology and processing time of the lining plate. Ball mill lining is the most important part of ball mill accessories. The heat treatment holding time of high manganese steel for ball mill lining is determined based on the full decomposition of carbides, and the decomposition product - carbon and alloying elements are solid dissolved into austenite. The carbon element diffuses to obtain alloyed austenite with as uniform a composition as possible. The factors to be considered in the holding time are the wall thickness of the ball mill lining plate casting, the solution treatment temperature, the chemical composition of the ball mill lining plate steel, the structural characteristics of the ball mill lining plate casting, etc. The thicker the wall of the ball mill lining plate casting, the longer the insulation time. The empirical data is per insulation. Steel contains alloying elements such as chromium and molybdenum. These special carbides are difficult to dissolve, the diffusion rate of alloying elements is slow, and the holding time must be appropriately extended. In this test, factors such as the thickness and structure of the ball mill lining are taken into consideration, and the intermediate holding time is extended to 10 to 30 seconds, so that the eutectoid transformation is sufficient and the carbides are spheroidized. Comprehensive comparison found that under this heat treatment process, the mechanical properties of seven types of austenite-modified high manganese steel are generally better than those under the first heat treatment process. Compared with the first heat treatment process, in the second process, carbides are precipitated in the crystals of high manganese steel with various components. Materials without rare earth modification treatment generally have coarse grains and larger carbide particles. However, the grains of the samples treated with rare earth modification are obviously refined, and the carbide particles are obviously fine and dispersed, so the performance of the ball mill lining is better. Because carbides have a huge impact on various properties of the modified ball mill high manganese steel lining plate. The occurrence of carbide phases in high manganese steel for ball mill lining plates does not necessarily significantly reduce toughness. As long as it is reasonable, it will be a strengthened phase, and if it is not reasonable, it will be a brittle phase. If the carbides are distributed in a continuous network at the grain boundaries, and many carbides exist in the form of needles and large particles, it will inevitably lead to embrittlement of high manganese steel. If the carbides are granular, fine, and dispersed in the crystal, it is a strengthening phase. From the comparison of performance data, it can be seen that the carbides in the sample grains strengthen the austenite matrix, which improves the performance of the steel.
Gongyi Xingnong Machinery Manufacturing Co., Ltd., a professional ball mill accessories manufacturer, specializes in the production of ball mill steel balls, lining plates, ball mill gears, ball mill bearings, ball mill couplings, jaw plates, hammer heads, ball mill eight-hole discs, etc. Ball mill accessories, in addition, our company also produces dryer accessories, rotary kiln accessories, crusher accessories, conveyor accessories and other mineral processing equipment accessories and ball mills, dryers, rotary kilns, aluminum ash equipment, steel slag equipment, ceramsite sand Equipment and other various mineral processing equipment
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