Numerical Simulation And Experimental Research For Hardness Field Of Cylinder Head Casting Of Gray Cast Iron

With the rapid development of computer technology, casting CAE technology hasbeen widely applied in practical production, such as numerical simulation in castingsolidification process, casting mold-filling process, stress field and casting micro-structure.On this basis, to numerically stimulate and predict the mechanical performance of thecasting has always been one of the most important and difficult aspects for the research ofthe scholars at home and abroad, as well as one of the hot spots for casting CAEtechnology. As the casting of engine family, cylinder casting is the most representativecasting product. There are great practical values and research meanings to conductexperiment and simulation research on hardness performance.The current paper takes the grey casting iron as the research subject, which isproduced by NO.1Foundry of Dongfeng Commercial Vehicle Company. Taking thehardness field of casting as the key point, experimental research and numerical simulationare carried out. The experimental research on harness field of cylinder head casting refersto a set of practical plans of casting section and hardness experiment, according to thecharacteristics of cylinder heading casting of grey iron. Based on this experiment design,the whole process of casting production is followed and some teeming parameters of thecasting are obtained, such as teeming temperature, teeming time and teeming liquid ironcomponents. At last, the section and hardness experiment are conducted on two groups offinished cylinder heading castings, and85actually measured hardness data on eachcylinder heading casting are acquired.For the numerical simulation of the hardness field of the casting, based on theteeming parameters acquired from the experiment, InteCAST is applied to make thenumerical simulation on temperature field during solidification process of the casting.Solidification cooling speed of each hardness experimental point is acquired by analyzingand calculating the simulation results. Based on this mathematical model, secondarydevelopment on the software is carried out to finally realize the establishment of3-Dhardness data of the grey iron cylinder heading casting. Because the establishment of thestatistics is based on the actually measured hardness value of the casting, the current research sheds significant lights on the prediction of the hardness performance of thecylinder head of the grey casting iron.