Study On The HCC Technology & Microstructure & Mechanical Properties Of Cast Iron Bars Applied To Air-Condition Compressor

In this thesis, the capability of HCC ZSL-02 line's main control-system was improved in view of application of engineering, the dynamic characteristic and brake-staff and the ability of anti-jamming of main control system were advanced. At the same time, the request of the draught apparatus was satisfied for HCC technology of the small diameter grey iron bars.The connection of chemical composition and microstructure of small diameter grey iron bars applied to air-condition compressor, and the method of controlling and settling carbonization in the surface layer of alloy-grey iron bars, and the techniques of controlling graphite morphology and matrices, and the measurement of excellent comprehensive mechanical properties were researched. The Cr-Mo-Cu low alloy grey iron bars had been produced, which chemical composition & microstructure & mechanical properties reached the demand of R/P of air-condition compressor.At the same time, it was discussed on the difference and the relationship of chemical composition & microstructure & mechanical properties between the applied to air-condition compressor bars and the common bars, the reason of excellent mechanical properties was analysed in theory that based on the analysis of microstructure and section. Results showed that being effected of the great cooling rate and alloy elements, the grey iron bars obtained well-developed primary austenite dendrite and very fine eutectic cell, vermicular-like and very fine D-type graphite, and mass of pearlite but a few of ferrite, as a result, the bars had very excellent comprehensive mechanical properties.The research is supported by school youth scientific fund...