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Precision cast heat-resistant steel castings 1.4855
1.4855 (a European standard heat-resistant steel casting) has excellent stability and durability
1. Overview
1.4855 (GX40CrNiSiNb24-24) is a casting grade of EN 10295-2002 and ISO 13583-2-2015. The material is famous for its excellent oxidation resistance, high temperature corrosion resistance and high temperature mechanical strength, and is widely used in industrial equipment in high temperature environment, such as sintering equipment, blast furnace equipment, heat treatment furnace, etc.
2. Chemical composition and physical properties
2.1 Chemical composition
The chemical composition of 1.4855 has been carefully designed to ensure its stability and durability at high temperatures. Its main components include:
Chromium (Cr): about 24%
Nickel (Ni): about 24%
Silicon (Si): a moderate amount
Niobium (Nb): an appropriate amount
Carbon (C): a lower content
This partition ratio gives it good antioxidant properties and creep resistance at high temperatures 2.
2.2 Physical performance
The physical properties of 1.4855 make it perform at high temperatures:
Antioxidation temperature: up to 1150℃
Creep resistance: excellent creep breaking strength in the range of 850℃ -1100℃
High temperature strength: it can still maintain high yield strength and tensile strength at high temperature
Processability: with good formability and weldability.
3. Main characteristics
3.1 Antioxidant properties
1.4855 In the high temperature environment can form a stable oxide membrane, effectively prevent further oxidation. Its antioxidant temperature is up to 1150℃, which is suitable for long time high temperature operation of equipment.
3.2 Corrosion resistance to high temperature
The material shows excellent resistance to high temperature corrosion in most gaseous media, especially in the corrosive environments containing sulfur and chlorine, and can still maintain stable performance.
3.3 High-temperature mechanical strength
1.4855 It has high yield strength and tensile strength under high temperature, and can withstand large mechanical load, which is suitable for high temperature furnace, radiation tube and other equipment.
3.4 Processability
1.4855 has good formability and weldability, suitable for processing into complex shape parts through casting, forging and other processes. In addition, its cutting ability is also good, easy for subsequent processing.
4. Application field
1.4855 is widely used in the following areas:
4.1 Metallurgical industry
Sintering equipment: heat resistant parts used in high temperature sintering process.
Blast furnace equipment: as the furnace bottom roller, radiation tube and other key components.
Heat treatment furnace: used for quenching furnace cover, horse-powered furnace and other equipment.
4.2 Chemical Industry and Energy
High temperature furnace tube: used for the synthesis of ammonia, ethylene cracking and other high temperature reaction equipment.
Heat exchanger: transfer heat at high temperature to keep the equipment running efficiently.
4.3 Other domains
Cement production equipment: the heat-resistant components used in the high-temperature calcination process.
Mineral processing equipment: to maintain stable performance in high temperature and corrosive environments.
5. Production technology and the selection of key points
5.1 Production process
1.4855 Usually using electric arc furnace or induction furnace smelting, for high quality required components, vacuum refining and furnace refining process are also used. The casting method includes sand type casting and precision casting to obtain products with smooth surface and precise size.
5.2 Selection of key points
Operating temperature: 1.48
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