An Application Study For Developing High Strength And Ductility Of Nodular Cast Iron With Six Sigma

Since the launch of ductile iron, it rapidly applied for its excellent performance and then become an important base material economy. However, with the development of society and technology, mechanical power core components, high strength bearing structural parts that bear the load increasing, due to the overall performance of ordinary ductile iron is not high, it has been difficult to do the job. Develop and achieve stable production of high strength and ductility of ductile iron foundry workers become an urgent problem facing.Six Sigma is favored by many of today’s outstanding enterprise quality management methods, it is on the management philosophy to improve customer satisfaction, increase enterprise efficiency for the purpose, through continual improvement of product and service quality, and promote the upgrading of enterprise performance. In the management approach, which provides specific ideas to solve the problem and steps of this method in many areas has proved to be fruitful.In this paper, the urgent need to improve the performance of ductile iron needs, introducing the Six Sigma methodology developed high strength and ductility of ductile iron. Six Sigma improvement steps to the main line to statistical quality tools, based on the integration of literature research, a comprehensive analysis of casting materials, alloying, ball, heat treatment process of ductile iron production process, and through the successful development of the tensile test design strength above855MPa, elongation rate of more than4.5percent of high strength and high ductility ductile iron, to solve the market need for high quality ductile iron, to achieve some of the high-performance engine crankshaft to the iron and steel, for businesses and customers to create a huge economic benefits.This study shows that the use of the Six Sigma method steps, combined with literature research, through process optimization and innovation, is a more effective way to achieve high strength and ductility of ductile reach, which will play a similar study reference.