nydcastings

melting deoxidation

Induction furnace cast steel melting deoxidation and refining method

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1. Pre-deoxidation Pre-deoxidation time: When the steel material has been completely melted, but the temperature is not high, generally about ≥1550℃, it is the best time for pre-deoxidation. Selection of pre-deoxidizer: Select manganese and silicon with better deoxidation effect and higher residual steel as pre-deoxidizer. Electrolytic manganese and crystalline silicon are used for steel with […]

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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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