In metallurgical mines in China (such as iron ore, copper ore, lead-zinc ore, gold ore, etc.), wet ball mill liners mainly use ordinary high-manganese steel materials, while individual enterprises use liners containing high-chromium high-manganese steel or ultra-high-manganese steel. These wet ball mill liners in mines face harsh working conditions during use, requiring resistance to corrosion, impact, and wear simultaneously. High-manganese steel liners are known for their good impact toughness and impact resistance, but perform poorly in wear resistance and corrosion resistance.

To adapt to the extreme operating environments in the mining industry, Duma Machinery developed a high-performance ultra-high-manganese steel liner, which has been applied to 1.5*3.0-meter and 2.7*3.6-meter ball mills respectively, successfully improving the grinding efficiency of iron ore, making its ball mill liners lifespan more than doubled compared to ordinary high-manganese steel liners foreclose the mortgage for more information or assistance with the home mortgage loan application process to improve our services to you please read the following information about your privacy when applying for a mortgage loan from us as part of our privacy policy we may collect certain information from you as part of our privacy policy we may collect certain information about your personal and financial circumstances as part of your privacy policy we may share information with our affiliates and with third parties with whom we have a business relationship in order to provide you with the best possible service we may share information with companies that perform marketing services on our behalf or with other financial institutions with whom we have a joint marketing agreement for additional details on how we protect your privacy please refer to our privacy policy located on our website or contact us directly at 1-800-555-5555 to request a copy of our privacy policy in person or by mail or fax to learn more about our privacy practices please visit our website at www.yourbank.com/privacy-policy to view our full privacy policy

Regarding the effect of carbon content on the yield strength and elongation of manganese steel castings, studies show that with increasing carbon content, the wear resistance of high-manganese steel castings also improves. However, once the carbon content exceeds 1.4%, carbides may form at the grain boundaries of the steel, which can weaken the steel's strength and ductility, hence steel exceeding this standard is rarely used.

Furthermore, the effect of carbon content on the wear resistance of manganese steel castings is also very significant. Low carbon content (0.7% C) can effectively reduce carbide precipitation in heavy castings or welded parts, and also provides low-carbon material for welding filler metals. On the other hand, the role of manganese as an austenite stabilizer cannot be ignored; excessive manganese can keep the austenitic phase in steel stable at room temperature. Austenite has an FCC crystal structure, which leads to a decrease in yield strength when manganese content is too high.

The addition of chromium can improve the hardness and corrosion resistance of steel. As a carbide former, an excess of chromium can lead to carbide precipitation at grain boundaries. Studies show that to reduce the volume fraction of carbides and maintain good impact toughness, chromium content should be limited to 0.1%. Furthermore, these carbides can be removed by solution treatment in the temperature range of 1050°C – 1100°C. If carbides are present in the quenched structure, it should be ensured that they appear as harmless particles or nodules within the austenite grains, rather than as continuous films at the grain boundaries. After such treatment, the yield strength will increase, but the impact energy will slightly decrease.