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Rapid remelting

Rapid remelting method of cast steel in non-vacuum induction furnace

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1. Preparation before smelting: Batch: Use high-quality profile scraps or refined continuous casting bars with the same or similar composition as the required steel grade as the main material. Generally, the amount of recycled materials should be controlled within 30%. For castings with high quality requirements, recycled materials are not used. The amount of ferroalloy […]

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hot cracking

Processing methods to prevent hot cracking of steel castings

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There are many factors that affect the formation of hot cracking in castings. Therefore, when considering measures to prevent hot cracking, we cannot start from a single factor, but need to conduct a comprehensive analysis based on the specific situation, so as to take corresponding measures. 1. Casting structure Irrational casting structure design is often

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cast QT700-10

Preliminary exploration of as-cast QT700-10 technology

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The influence of chemical composition on the performance of ductile iron Chemical composition and metallographic structure Ductile iron uses Si and B as alloying elements to achieve high strength and high toughness comprehensive mechanical properties of cast ductile iron. Based on this, we designed the main chemical composition of cast QT700-10 as shown in Table

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metallographic structure

Metallographic structure of heat-resistant cast iron

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The metallographic structure of heat-resistant cast iron is mainly composed of metal matrix, graphite phase and special phase formed by alloy elements. The following is a detailed introduction: Metal matrix Ferrite matrix: It has good toughness and anti-growth performance, can remain stable at high temperature, and reduce the volume change and microcracks of castings. For

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gray iron and ductile iron

Technology of melting ductile iron with cast scrap steel and carburizer

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1. The influence of melting molten iron in electric furnace on material properties 1.1 Influence on “spontaneous nucleation” The melting point of scrap steel is higher than that of cast iron, and the melting point of carburizer is even higher. When scrap steel is melted and melted, the carburizer is heated and slowly dissolved and

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