Carbon sulfur analyzer is a good helper for ductile iron piston ring casting technology Under the conditions of Mn , P and S super high-strength iron in China, the C and Si contents of the original molten iron in front of the furnace are strictly controlled , and special spheroidizing agents and inoculants are used. Based on the advanced casting process design, the main reason is The raw material problem and the production process of the ductile iron piston ring are too complicated, it is difficult to ensure the matrix structure of the ductile iron piston ring, and the qualification rate of the casting cannot be guaranteed. The use of carbon and sulfur analyzer to grasp the sulfur content of the base iron melt and create the conditions for the addition of the correct ball control agent by detection and analysis of carbon and sulfur analyzer of raw materials, while using M inoculant also ductile The production of cast iron piston rings plays a supporting role. German experts have repeatedly stressed that "the key to the production of ductile iron piston rings is raw materials". It is difficult to produce ductile iron piston rings without qualified raw materials. They emphasize the use of high-purity pig iron or synthetic pig iron, the composition of which is: 3 8% ~ 4 3% C , 0 2% ~ 0 4% SI , 0 04% ~ 0 15% Mn , P <0 045% , S <0 01% , other elements must not exceed 0 03% . However, there is no such new iron resource in China. The possible iron content in China is: 3 8% to 4 3% C , 0 8% to 1 3% Si , 0 2% to 0 5% Mn , P<0 07% , S<0 03% . This kind of pig iron affects the spheroidizing treatment of the key elements Mn , P , S super high, which brings great disadvantages to the production of ductile iron piston rings. At present, it is very difficult to find the source of raw materials or synthetic pig iron that meets the requirements in China. It is not realistic to introduce raw materials. Therefore, when selecting raw materials, it should meet the foreign requirements as much as possible, and test the selected pig iron components: 40% to 4 2% C , 0 80% to 0 9% Si , 0 20% to 0 4% Mn , 0 04% ～ 0 06%P , S<0 026% . This kind of pig iron has the following characteristics compared with the pig iron required by foreign countries: 1 The amount of silicon is extremely high from 0 4% to 0 6% . Due to the use of intermediate frequency furnace smelting, although it will limit the recovery and utilization of the recycled material, it will not pose too much threat. 2 The amount of manganese is too high from 0 14% to 0 2% . The higher manganese content affects the control of the as-cast structure, and the subsequent ferritic annealing treatment can solve this difficulty. However, the appearance of excessive cementite will affect the pass rate of spheroidization and the dimensional control before and after heat treatment. 3 phosphorus content is acceptable. Even if the amount of phosphorus in the new iron used later is slightly higher (<0 07%) , it is not enough to affect the metallographic structure and mechanical properties. If the phosphorus content is too high, the phosphorus content of the casting will be >0 1% , which will produce phosphorus eutectic at the grain boundary, which will reduce the strength, toughness and plasticity. 4 sulfur content is over 0 016% . The higher sulfur content will directly consume the amount of spheroidizing agent, especially the effect of dissolved sulfur on the spheroidization of graphite during solidification, which will directly affect the effect of spheroidization, reduce mechanical properties, and increase casting defects ( slag inclusion, pinhole, etc.) ......  Carbon sulfur analyzer For more product information, please visit the following website High-frequency infrared carbon and sulfur analyzer http:// Infrared carbon sulfur meter http:// Elemental Analyzer http:// Multi-element analyzer http:// Spark direct reading spectrometer http:// Carbon and sulfur analysis instrument http://  Nanjing Qilin Scientific Instrument Group Co., Ltd. Testing Center