Carbon & Sulfur Analyzer Analyze Ductile Iron
By using Carbon & Sulfur Analyzer to analyze ductile iron, first of all, we need to think about what is ductile iron?
Because the ductile have a high comprehensive mechanical properties, It has been widely used in various mechanical parts, such as internal combustion engine crankshaft, camshaft, automobile clutch and chassis parts, some machine tood spindles, ploughshares in agricultural machinery, valve bodies in general machinery, hydraulic components, etc. Furthermore, It is also widely used to produce cast steel, rolls and ingot molds, etc. Carbon & Sulfur Analyzer who produced byJIN YIBO INSTRUMENT TECHNOLOY CO., LTD can analyze iron alloy, stainless steel, carbon steel, alloy steel, casting iron, ductile iron, non-ferrous metals and the content of carbon and sulfur in materials. This Carbon & Sulfur Analyzer adopts double CPU processing system and high-precision acquisition system. Its collection speed can reach four times per second, industrial-grade module power supply, strong anti-interference ability, platinum infrared light source, sufficient light energy. It adopts aviation motor to modulate the light source signal, the signal is stable, the gold-plated detection gas chamber has less light absorption. It can also add dual-carbon infrared detection pool, automatic switching, ect.
The auxiliary additive used for spheroidization is called spheroidizing agent. Commonly used are pure metals including magnesium and alloy. Compared with ordinary gray cast iron, ductile iron has higher strength, better plasticity and toughness. China is rich in rare earth metals resources, and ductile iron has beome a widely used structural material. Production process: Add pure magnesium, nickel-magnesium, silicon, iron, magnesium, or ferrosilicon rare earth magnesium alloy as nodulizer to the molten iron with high carbon and silicon content and low sulfur and phosphorus content, and then use ferrosilicon, calcium silicon or when other multi-component alloys are processed, they can obtain nodular cast iron in the as-cast state.
In order to further change its mechanical properties, nodular cast iron can be subjected to Various heat treatments, such as annealing normalizing, quenching, tempering or isothermal quenching. According to the different chemical compositon, solidification speed and heat treatment specifications, the microstructure of ductile iron except spherical graphite can obtain different metal matrix. There are ferritic ductile iron with lower tensile strength and higher elongation, pearlite ductile iron with higher tensile strength and lower elongation, bainite and austenite with excellent tensile strength and elongation body-bainite ductile iron,etc.
Development: In order to reduce casting defects and at the same time improve the mechanical properties of ductile iron, people are studing to improve the molten iron smething process, redice the sulfur content of molten iron, develop new inoculants, and carry out a variety mechanical properties suchas high and low temperature properties, fatigue strength research work on facture toughness and testing. It is also an important development direction to develop a prodcution process that can achieve the desired performance of nodular cast iron without heat treatment, and to add a small amount of alloying elements to obtain higher tensile strength and elongation.