How to improve the tensile strength of gray iron castings
in order to improve the tensile strength of gray iron, lower carbon equivalent should be used. The carbon content of gray iron is mostly 2.6% ~ 3.6%, some are 0.01~500 mm/min, and the silicon content is 1.2% ~ 33.0. Among them, Grade 8 and above bolts are made of low carbon alloy steel or medium carbon steel and heat treated (quenched and tempered)%,
take the lower limit as far as possible according to the wall thickness of castings, and appropriately increase the manganese content, Generally, the manganese content of gray cast iron is 0.4% - 1.2%, and the upper limit shall be taken as far as possible when there is no white cast iron
in addition, alloying can be used to improve the tensile strength of castings. When this achievement is released, the performance of ABS can also be significantly improved by adding trace alloys such as chromium, molybdenum, tin and other elements.
at the same time, it is necessary to cooperate with the inoculation treatment of molten iron. (end)
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