Preparation method of high silicon molybdenum nodular cast iron material and high silicon molybdenum nodular cast iron material

Abstract

A high silicon molybdenum nodular cast iron material is characterized in that the high silicon molybdenum nodular cast iron material is prepared from 3.3%-3.5% of carbon, 3.4%-3.6% of silicon, 0.5% or less of manganese, 0.05% or less of phosphorus, 0.006%-0.012% of sulphur, 0.04%-0.06% of magnesium, 0.4%-0.6% of molybdenum and the balance iron; for the high silicon molybdenum nodular cast iron material, the tensile strength is larger than or equal to 460 Mpa, the yield strength is larger than or equal to 350 Mpa, and the ductility is larger than or equal to 10%. The invention further provides a preparation method of the high silicon molybdenum nodular cast iron material.

Description

Technical field [0001] The invention relates to the technical field of preparation of a kind of nodular cast iron material, in particular to a preparation method of a high silicon molybdenum nodular cast iron material and a high silicon molybdenum nodular cast iron. Background technique [0002] Regarding high-silicon molybdenum materials, domestic enterprises and universities have conducted in-depth research on them. For example, the invention patent with publication number CN102978507A uses three inoculations, that is, the inoculation treatment in the spheroidizing bag, and the molten iron from the spheroidizing bag to When the pouring ladle is inverted, the incubation is carried out when the ladle is inverted, and the inoculation with the flow is carried out during the pouring. Although it can ensure that the spheroidization rate at different wall thicknesses is ≥90%, and the microscopic shrinkage at the tip of the tongue can be eliminated. In order to improve the roundness of...

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Problems solved by technology

[0002] Regarding high-silicon-molybdenum materials, domestic enterprises and universities have conducted in-depth research on them. For example, in the invention patent with the publication number CN102978507A, three inoculations are used, that is, inoculation in the spheroidizing bag, and molten iron from the spheroidizing bag to When the pouring ladle is inverted, inoculation is carried out, and inoculation is carried out during pouring. Although the nodularization rate at different wall thicknesses can be guaranteed to be ≥ 90%, and the microscopic shrinkage at the tip of the tongue can be eliminated, but the use of inverted inoculation increases the The production process is simplified, and in this patent, in order to improve the roundness of graphite and eliminate fragmented graphite, Sn and Sb microalloying elements are added during inoculation, which not only increases the production process, but also increases the production cost

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