High Temperature Sintering Tray Material Selection & Service Life

Sintering tray is an indispensable bearing accessory for powder metallurgy PM and MIM part sintering production, directly bearing high-temperature baking, workpiece pressure and cyclic thermal shock. The tray material performance determines the product sintering quality and service life, and affects the production line operating cost.

Unreasonable sintering tray material selection will lead to tray deformation, cracking, high-temperature oxidation and short service life, causing workpiece deformation, pollution and frequent tray replacement losses. This article sorts out mainstream high-temperature sintering tray materials, compares their performance and service life, and provides professional selection suggestions.

Mainstream High-Temperature Sintering Tray Materials & Performance

1. Stainless Steel High-Temperature Alloy Tray

Main materials: SUS310S, 309S high-temperature resistant alloy. Features: good toughness, strong impact resistance, not easy to crack, suitable for medium and high temperature sintering below 1150°C. Service life: 6-12 months under continuous production. Advantages of low cost and easy processing.

2. Ceramic Fiber Sintering Tray

Features: ultra-light weight, good thermal insulation performance, small thermal deformation, no pollution to workpieces. Suitable for high-precision, low-load sintering production. Service life: 8-15 months. Disadvantages: low impact resistance, easy to break by external force.

3. Silicon Carbide Sintering Tray

Features: ultra-high temperature resistance, strong structural stability, excellent oxidation resistance, no deformation in long-term high-temperature environment. Suitable for high-temperature sintering above 1150°C. Service life: 18-36 months, long service cycle. High procurement cost but low comprehensive replacement cost.

4. Custom High-Temperature Alloy Cast Tray

Features: high structural strength, strong load-bearing capacity, suitable for heavy-duty workpiece sintering production. Stable performance under long-term cyclic high-temperature working conditions. Service life: 12-24 months.

Scenario-Based Material Selection Standards

1. Medium-Temperature Conventional Sintering (Below 1150°C)

Select SUS310S high-temperature alloy tray, with balanced performance and cost, meeting daily mass production demand, suitable for ordinary PM parts and conventional stainless steel parts sintering.

2. High-Temperature Precision Sintering (Above 1150°C)

Select silicon carbide sintering tray, with ultra-high temperature stability, no deformation and no impurity precipitation, ensuring high precision and high surface quality of sintered parts.

3. Lightweight & High-Precision Production

Select ceramic fiber tray, with light weight, small heat capacity, fast temperature response, no scratch and pollution on workpiece surface, suitable for high-precision MIM parts production.

4. Heavy-Duty Batch Sintering Production

Select custom high-temperature alloy cast tray, with strong load-bearing capacity and structural stability, adapting to long-term heavy-load sintering production.

Daily Maintenance Methods to Extend Tray Service Life

Regularly clean surface sintering residues and oxide scales to avoid local stress concentration and corrosion damage caused by residual impurities. Standardize workpiece placement to avoid eccentric load and local overload pressure.

Avoid rapid temperature rise and fall impact during equipment operation; place trays stably to avoid collision and friction damage. Regularly inspect tray deformation and damage, replace defective products in advance to avoid affecting product quality.

Conclusion

Scientific selection of sintering tray materials according to sintering temperature, workpiece load and product precision requirements can effectively improve sintering quality and extend tray service life. Cooperated with standardized daily maintenance, it can greatly reduce accessory replacement cost and production shutdown losses, improving comprehensive production benefits.