D-type graphite cast iron bar and preparation method thereof
A technology of graphite cast iron and profiles, applied in the field of D-type graphite cast iron profiles and their preparation, to achieve the effects of reduced splitting effect, easy processing and uniform organization
Inactive Publication Date: 2019-02-15
HANDAN HENGGONG METALLURGICAL MACHINERY CO LTD
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Abstract
The invention discloses a D-type graphite cast iron bar. The D-type graphite cast iron bar comprises, by mass, 3.4-3.5% of carbon, 2.5-2.6% of silicon, 0.5-0.6% of manganese, no more than 0.050% of sulfur, no more than 0.15% of phosphorus, 0.15-0.35% of titanium, and the balance iron. According to a preparation method of the D-type graphite cast iron bar, a proper amount of titanium alloy is added, so that the graphite in base iron liquid is refined to a certain extent in advance, the intensity much higher than that of A-type graphite is achieved without need of a large proportion of pearlite,the structure is uniform and compact, and machining is easy.
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PearliteCast iron +9
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