| The cylinder diesel engine is the key component in the work, under the complex alternating stress. As the truck continued to increase horsepower, diesel engine power continues to increase, and the state of the increasingly stringent emissions requirements, diesel engines are exposed to a variety of loads in a sharp increase. Thus making the engine to high speed, enhanced, high-life and other direction of development, the design of the cylinder body and the material put forward more stringent performance requirements, in particular, the material will directly affect the performance of the engine performance. The inoculation is the casting process is one of the most important part of good breeding process can have a gray cast iron to meet the requirements of the microstructure, mechanical properties in order to ensure the casting and machining performance, inoculation directly affect the level of product quality and yield.This process started from the inoculation, the production of gray iron castings in the inoculation process, conceived through the use of secondary treatment process with the flow instead of a birth process, to achieve improved quality castings. Use the second inoculation with the flow of the casting process to produce uniformity in terms of tensile strength and hardness are superior to using a birth process of casting, using the second inoculation with the flow of the casting process to produce graphite morphology are better.we use the second inoculation with the flow process, we found that testing belly casting position in the machine has rust, affecting the aesthetics of the surface of the casting, casting cleanliness while there may be hidden. The problem has led to a second inoculation with the flow process was suspended and in deep trouble. By inoculant species, type of sand core and coating types in areas such as investigation, verification, it is important to identify the causes and effects of rust appear factor, to solve the problems. |
