What material is used to cast sand
In the casting industry, casting sand is a key material used to manufacture casting molds, and its performance directly affects the quality and production efficiency of castings. With the development of technology, the material selection of casting sand is becoming increasingly diversified. This article will combine popular topics and hot contents on the entire network for the past 10 days to introduce you to the common materials and characteristics of casting sand in detail.
1. The main materials for casting sand
The material selection of cast sand is usually based on factors such as fire resistance, breathability, strength and cost. The following are common materials and their characteristics of cast sand:
| Material Type | Features | Applicable scenarios |
|---|---|---|
| Silicon sand | High fire resistance and low cost, but phase change is prone to occur at high temperatures | Ordinary cast iron, cast steel |
| Chromite sand | Excellent fire resistance, low thermal expansion coefficient, but high cost | High alloy steel, stainless steel casting |
| Zirconium sand | Excellent fire resistance, good thermal stability, but expensive | Precision casting, high temperature alloy |
| Peridot Sand | Environmentally friendly and non-toxic, with low thermal expansion coefficient but low strength | Aluminum alloy, magnesium alloy casting |
| Resin sand | High strength and easy to form, but need to add binder | Complex castings, mass production |
2. Performance indicators of cast sand
The properties of casting sand directly affect the quality of the castings. The following are the main performance indicators and requirements of cast sand:
| Performance metrics | Require | Test Method |
|---|---|---|
| Refractory | ≥1580°C | High temperature sintering test |
| Breathability | 50-150 (unit: cm³/min) | Breathability tester |
| strength | ≥0.5MPa (wet state) | Compressive strength test |
| Particle size distribution | 70-140 mesh (commonly used range) | Screening analysis |
3. Material selection trends for casting sand
According to the analysis of hot topics in the past 10 days, the selection of cast sand has shown the following trend:
1.Environmental protection: With the increasing stricter environmental regulations, non-toxic and recyclable casting sand materials (such as olivine sand) have attracted more attention.
2.High performance: The growing demand for high alloy steel and precision casting has driven the application of zirconium and chromite sand.
3.Intelligent: Intelligent control technology of adhesive materials such as resin sand has become a research hotspot to improve production efficiency and casting quality.
4. Application cases of cast sand
The following are the application cases of casting sand mentioned in recent hot topics:
| industry | Application Cases | Material selection |
|---|---|---|
| Automobile manufacturing | Engine block casting | Resin sand + silica sand mix |
| Aerospace | Turbine blade precision casting | Zirconium sand |
| Energy Equipment | Nuclear power valve casting | Chromite sand |
5. Summary
The material selection of casting sand is a key link in the casting process and needs to be comprehensively considered based on factors such as casting material, production conditions and cost. With the advancement of technology, the materials and properties of casting sand will be continuously optimized, providing stronger support for the development of the casting industry.
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