Silicon and strontium nucleating agent and preparation method thereof

Abstract

The invention discloses a silicon and strontium nucleating agent and a preparation method thereof, and relates to the field of nucleating agents. The silicon and strontium nucleating agent includes the following components including, by weight, 68% to 72% of silicon, 0.6% to 1.0% of strontium, 0.8% to 1.5% of barium, 1.0% to 2.0% of calcium, not larger than 2% of aluminum and the balance iron; andthe silicon element comes from non-metallic silicon, the strontium element comes from metal strontium, the barium element comes from metal barium, the calcium element comes from metal calcium, the aluminum element comes from metal aluminum, and the iron is selected from scrap steel. By means of the silicon and strontium nucleating agent and the preparation method, approximate general international standard production of strontium serial alloys with the silicon as the basis is achieved, when the nucleating agent is used as a high-grade grey cast iron nucleating agent, the anti-decay time is long, the white mouth reducing ability is high, under-skin cast pores are reduced, and a unique effect on the aspect of improving the machining performance is improved.

Description

technical field [0001] The invention relates to the field of inoculants, in particular to a silicon strontium inoculant and a preparation method thereof. Background technique [0002] Cast iron is an iron-carbon alloy with a carbon content greater than 2.1%. Gray cast iron is a type of cast iron. The graphite in gray cast iron is lamellar and the fracture is dark gray. The main components of gray cast iron are iron, carbon, silicon, manganese, sulfur, and phosphorus. Gray cast iron is low in cost and has good casting and service performance. Therefore, gray cast iron is an important and commonly used structural material in modern machine manufacturing, and is the most widely used The output of cast iron accounts for more than 80% of the total output of cast iron. [0003] With the development of industrial technology, the requirements for the mechanical properties of cast iron are getting higher and higher. There are mainly the following ways to improve the mechanical prope...

AI Technical Summary

Problems solved by technology

Rare earth ferrosilicon inoculants can meet the inoculation requirements of low-carbon and low-silicon molten iron, and play a role in purifying molten iron, increasing supercooling, promoting the formation of pearlite and refining grains, so as to improve and stabilize the mechanical properties of castings The purpose of the existing silicon-strontium inoculants is that the anti-recession time is short, the ability to reduce whitening is weak, the subcutaneous pores of the casting are many, and the ability to improve the machining performance is poor.