A double rare earth doped modified wear-resistant alloy cast iron and its preparation method

A wear-resistant alloy and dual rare earth technology, applied in the preparation of wear-resistant alloy cast iron, wear-resistant alloy cast iron field, can solve the problems of uneven structure, poor surface quality, segregation, etc., to reduce grain boundary segregation and inclusions, improve hardness and wear resistance, the effect of improving the bonding strength
CN105779859BActive Publication Date: 2018-04-24HARBIN ENG UNIV
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
HARBIN ENG UNIV
Publication Date
2018-04-24

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Abstract

The invention provides a double-rear earth doping modification abrasion-resistant alloy cast iron and a preparation method thereof. A mixture is prepared, wherein the mixture comprises the following components in percentage by weight: 3.1-3.2% of C, 0.9% of Si, 0.6% of Mn, 1.0-1.5% of Cu, 0.2-0.4% of P, 0.02-0.04% of B, 0.0005% of S and Fe; in a smelting furnace, the prepared raw material is smelted at 1500-1550 DEG C to obtain molten iron; 0.01-0.4% of La and 0.01-0.7% of Ce are added in before the raw material is added into a casting ladle, and then the mixture is added into the casting ladle for ladle inoculation, wherein the inoculation time is 10+ / -2 min, and the tapping temperature of the molten iron is 1400-1450 DEG C; and casting is performed to obtain the double-rear earth doping modification abrasion-resistant alloy cast iron. The double-rear earth doping modification abrasion-resistant alloy cast iron is low in cost and high in abrasion-resistance, and is applicable to manufacture of cylinder jackets, piston rings and other friction parts of automobiles, ships and the like; and the process is simple.
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Description

technical field

[0001] The invention relates to a cast iron, in particular to a wear-resistant alloy cast iron. The invention also relates to a preparation method of wear-resistant alloy cast iron. Background technique

[0002] Cast iron is a multi-element iron-based alloy mainly composed of Fe-C-Si, and its chemical composition (mass fraction) ranges roughly from C: 2.0% to 4.0%, Si: 1.0% to 3.0%, Mn: 0.1% to 1.5%, P: 0.05% to 1.0%, S: 0.02% to 0.25%. On the basis of this composition, alloy cast iron with different properties can be obtained by adding other metal elements.

[0003] In the process of iron and steel casting, rare earth elements can be added to molten iron as nodularizers, refining agents and desulfurizers, which can significantly optimize the casting performance of cast iron, improve surface quality, reduce casting surface cracks, pores, shrinkage cavities, and reduce segregation . And obtained vermicular graphite cast iron with good wear resistance, whic...

Claims

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