Nodular cast iron crankshaft
A nodular cast iron and crankshaft technology, applied in the direction of the crankshaft, can solve the problems of affecting service life, low tensile strength, poor wear resistance, etc., and achieve the effects of improving production efficiency, increasing elongation and tensile strength, and reducing production costs
Active Publication Date: 2012-03-21
侯马市威创动力机械有限公司
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Problems solved by technology
At present, most domestically produced crankshafts adopt rough casting-normalizing-rough machining-quenching+tempering-rolling-finishing and other process steps. The as-cast mechanical properties of crankshafts produced by this fire method reach 800-2. Low rate, easy to break, low tensile strength, poor wear resistance, affecting its service life
Method used
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Experimental program
Comparison scheme
Effect test
Embodiment 1
[0008] A nodular cast iron crankshaft, its composition and content are: 80% nodular cast iron, 15% steel scrap, 0.6% nodularizer, 0.02% antimony, 0.4% copper, 0.8% silicon, 3.18% scrap crankshaft.
Embodiment 2
[0010] A nodular cast iron crankshaft, its composition and content are: 75% nodular cast iron, 20% scrap steel, 0.5% nodularizer, 0.02% antimony, 0.5% copper, 0.6% silicon, 3.38% scrap crankshaft.
Embodiment 3
[0012] A nodular cast iron crankshaft, its composition and content are: nodular cast iron 78%, steel scrap 19%, nodularizer 0.6%, antimony 0.02%, copper 0.45%, silicon 0.67%, scrap crankshaft 1.26%.
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The invention relates to a nodular cast iron crankshaft, comprising 75-80% of nodular cast iron, 15-20% of waste steel, 0-0.6% of nodulizer, 0-0.02% of antimony, 0.4-0.5% of copper, 0.6-0.8% of silicon and the balance of waste crankshaft. The nodular cast iron comprises 3.9-4.4% of charcoal, 0.6-0.8% of silicon, 0-0.3% of manganese, 0-0.5% of phosphor and 0-0.03% of sulfur. The waste steel comprises 0.3-0.45% of charcoal, 0.2-0.3% of silicon and 0.2-0.3% of manganese. The crankshaft of the invention has a cast state mechanical property reaching 900-4, increased elongation percentage, tensile strength and wear resistance, and effectively prolonged usage life.
Description
technical field [0001] The invention relates to a crankshaft, in particular to a nodular cast iron crankshaft. Background technique [0002] The crankshaft is the main rotating part of the engine. After the connecting rod is installed, it can undertake the up and down (reciprocating) motion of the connecting rod into a circular (rotating) motion. It is an important part of the engine. The rotation of the crankshaft is the power source of the engine. The material of the crankshaft is mostly made of carbon structural steel or ductile iron. At present, most domestically produced crankshafts adopt rough casting-normalizing-rough machining-quenching+tempering-rolling-finishing and other process steps. The as-cast mechanical properties of crankshafts produced by this fire method reach 800-2. Low rate, easy to break, low tensile strength, poor wear resistance, affecting its service life. Contents of the invention [0003] The technical problem to be solved by the present invent...
Claims
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IPC IPC(8): C22C33/08C22C37/10C22C37/04F16C3/06
Inventor 郝国平刘张红
Owner 侯马市威创动力机械有限公司
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