Multi-element low-alloying treatment method for high-strength gray cast iron

Abstract

The invention discloses a multi-element low-alloying treatment technical method for high-strength gray cast iron, and belongs to the technical field of casting. The method comprises the following steps of A, determining the components and proportion of furnace charge in a high-strength gray iron casting, a matching method and content range of various alloy elements and a content range of conventional chemical elements according to the requirements of a to-be-produced casting; B, determining a melting process procedure of the high-strength gray iron casting; C, preparing materials, charging, heating and melting according to the requirements of "cast iron melting burdening process sheet"; D, sampling and analyzing the chemical components of an iron liquid in a furnace, and adjusting the chemical components of the iron liquid in the furnace; E, carrying out molten iron treatment and tapping pouring; and F, detecting the material performance of the high-strength gray iron casting. The method provides a simple and feasible chemical component determination, melting burdening and alloy liquid treatment method, so that alloy element matching, cast iron melting burdening and alloying treatment of the high-strength gray cast iron are more accurate and convenient, and cast iron melting operation control is more reasonable and feasible.

Description

technical field [0001] The invention belongs to the technical field of casting, and in particular relates to a multi-component low-alloying treatment method for high-strength gray cast iron. Background technique [0002] As a traditional casting metal material, gray cast iron occupies a non-negligible position in casting production. Nowadays, in the context of lightweight automobiles, energy saving and consumption reduction, due to its advantages of low cost, good shock absorption, and good casting formability, etc. , Gray cast iron materials are increasingly widely used. However, with the rapid development of the modern machinery industry, the requirements for the quality and production technology of gray cast iron products are becoming more and more stringent, and requirements such as high strength, thin wall, and low cost are put forward. [0003] Cast iron alloying is one of the main technical approaches to improve the structure of cast iron, improve the mechanical prop...

AI Technical Summary

Problems solved by technology

In terms of the existing intermediate frequency electric furnace cast iron smelting technology, research on the multi-component low alloying treatment of high-strength and high-grade gray cast iron is relatively rare. There is no systematic and comprehensive high-strength gray cast iron alloy element matching method and melting batching technology. Personnel generally only rely on production practice experience to explore and control, and cannot guarantee accurate, fast and low-cost cast iron alloying treatment, control of cast iron chemical composition and smelting production process, and cannot guarantee that cast iron material and internal quality of castings are stable and meet the requirements

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