Intelligent preparation method for low-tin silicon-molybdenum vermicular graphite cast iron

Abstract

The invention discloses an intelligent preparation method for low-tin silicon-molybdenum vermicular graphite cast iron. The intelligent preparation method comprises the steps that whether the weight of raw materials placed into a converter reaches a predetermined value or not is induced by an induction module; and the contents of all elements of molten iron are detected through an element detection module, and a programmable logic controller (PLC) controls a heating module, a decarbonization module, a stirring module, a prompt module, a roasting module and a valve control module to execute corresponding operation according to received data information through internal calculation and analysis. According to the intelligent preparation method for the low-tin silicon-molybdenum vermicular graphite cast iron, various parameters such as the temperature, the time and the amount of the materials placed in the converter can be strictly controlled in the preparation process, the error rate is decreased, and the preparation efficiency and the quality of the low-tin silicon-molybdenum vermicular graphite cast iron are improved; the workload of operators is greatly reduced, and high automation of the preparation process is achieved.

Description

technical field [0001] The invention relates to the field of automatic control, in particular to an intelligent preparation method of low-tin-silicon-molybdenum vermicular graphite cast iron. Background technique [0002] Modern diesel engines have the characteristics of high power per liter, compact structure, complex casting shapes, large heat loads, and high degrees of reinforcement. New updates have been made not only to the design technology, but also to the materials and manufacturing technologies of critical parts such as the diesel engine body and cylinder head. High requirements require that materials not only have high room temperature and high temperature mechanical properties, excellent thermal conductivity and shock absorption properties, and excellent thermal fatigue properties, but also require high compactness, uniformity, and reliability. The shapes of graphite in cast iron are flake, worm and spherical. Vermicular graphite is an intermediate form of graphit...

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Problems solved by technology

[0003] Due to the low creep rate and poor comprehensive performance of traditional vermicular cast iron, its popularization and application are seriously hindered.

Although a lot of work has been done on vermicular cast iron at home and abroad, and many achievements have been made, many difficulties have been encountered in the process of popularizing and applying this material in industry, mainly manifested in the instability of vermicular treatment and the instability of vermicular treatment during the preparation of the material. The conversion rate is low and difficult to control, and the overall performance is poor

[0004] At present, most of the general cast iron relies on manual operation. The temperature, time and dosage of materials are manually operated. However, these data need to be strictly controlled. If there is a slight discrepancy, it may cause the preparation of vermicular graphite cast iron. The quality and parameters are different, and there are a lot of data that need to be measured during the preparation process. Manual memory and operation are easy to make mistakes. Moreover, due to the time-consuming manual operation, the preparation efficiency is not high due to various reasons.

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