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Chemical composition control of chilled cast iron camshaft

The control of chemical composition is the basis to ensure the casting quality of chilled cast iron camshaft. For chilled cast iron camshaft, the reference value of main composition is recommended in technical specification for automobile engine camshaft (QC / T 544-2000). Specific to customers and products, chemical composition...

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Metallographic structure control of chilled cast iron camshaft

1.Technical requirements For the technical requirements of metallographic structure, most customers’ products are basically consistent with those recommended in technical conditions for camshaft of automobile engine. Fig. 1 is a schematic diagram of metallographic cutting of all cold shock cam. From the surface layer to the center of the...

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Iron coated sand technology for large engine crankshaft

Large castings are not rare in iron mold sand coating process casting, but for large engine crankshaft castings with large cross-section and large transverse size, the sand coated iron mold casting process is still lack of experience. In particular, as an important part of the engine, crankshaft bears the...

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Failure analysis of diesel engine transmission shaft crack

The results are as follows (1) Through spectral analysis, the chemical composition of the sample is more than the requirements of GB / t5216-2014. In sample 1, the chemical composition was analyzed by three times direct reading spectrum. The content of C element (mass fraction,%) was 1.5, 0.5 and...

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Failure analysis of a diesel engine transmission shaft crack

42crmoh steel belongs to medium carbon alloy structural steel, which has high strength and toughness, good hardenability, no obvious temper brittleness, high fatigue limit and multiple impact resistance after quenching and tempering treatment, and good low temperature impact toughness. Therefore, 42crmoh steel is designed for diesel engine transmission shaft....

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