Analysis of Casting Quality of a Fastening Baffle with Failure
A fastening of sleeper is an important part to bind rail, sleeper and foundation under the track, which requires enough strength, elasticity et al.. This article focuses on the common occurrence of fracture on a casting fastening baffle by metallographic analysis of the materials of different part in the casting, and reaches the conclusion that the unevenly distribution of chemical composition is due to the different cooling rate of different wall thickness. The low carbon content in thin wall and the lack of pearlite with high strength in matrix structure aggravates the danger of the emergence of cracks. Then a solution is put forward, which is to improve the structure of the casting and reasonably arrange the inner runner when casting.
M. H. Zhu et al., "Analysis of Casting Quality of a Fastening Baffle with Failure", Advanced Materials Research, Vols. 211-212, pp. 691-694, 2011