Heating Rate Is One Vital Factor of Material Quality

During the heating process, high manganese occurs the eutectoid transformation at 550-600 ℃, which becomes the pearlite. At the beginning, the austenite around the carbides decomposite, and the range then gradually expands. And at the beginning, the pearlite is lamellar. With the increase of the temperature, it tends to grainy. When it is heated to above the eutectoid temperature, the organization of the pearlite type will produce the recrystallization of austenite. This process is a formation and growth process for the austenitic core on the phase interface. Considering the service life of the impact crusher, Hongxing Mining Machinery has special treatment in the process of the material of the liner. Before the high-manganese steel material is made into the liner of the impact crusher, it needs to go through water toughing. In this process, the heating rate is one of the most important reasons to affect the final quality of the materials.

Under normal circumstances, when the heating temperature is below 400 ℃, the cast structure dose not change significantly. The needle-like carbide precipitates when the temperature is around 450℃. Carbides significantly increase at 500℃. The carbide precipitation is the most at about 550℃. The length of the needle-like carbides gradually becomes shorter and the layers becomes generous when the temperature is 600℃, . Above 700 ℃, the carbide castings in the cast structure begin to dissolve in the austenite. Mobile stone crusher is new type mining equipment. As a Chinese mobile stone crushers manufacturer, Hongxing Machinery supplies stone mobile jaw crusher, stone mobilecone crusher, mobile stone impact crusher and mobile VSI crushing plant for sale with high quality and low cost.

In the heating process of the high-manganese steel, if the heating rate is fast enough, the austenite can not precipitate the carbides. There will no eutectoid reaction. By this point, we can control the precipitation of carbides in high-manganese steel heating process. Managing to reduce the precipitation of carbides in the heating process is helpful for the performance of steel. In the actual operation, since the furnace temperature and heating rate is related to the specific conditions of the casting, we can carry out the operation according to the actual practice.

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