PM components and cemented carbide blanks pursue high density and low porosity. Split dewaxing & sintering leaves internal impurities. Rexin integrated vacuum sintering furnaces optimize metallographic structure and raise product yield for iron-based and carbide materials.

Powder metallurgy parts and cemented carbide blanks are widely used in precision machinery, automotive transmission and tool manufacturing fields. Sintering is the core process that determines product density, hardness and service life. Most manufacturers adopt separate dewaxing and sintering equipment or ordinary atmospheric sintering furnaces, which are prone to typical defects: internal residual lubricant impurities, microscopic porosity, insufficient product density, uneven hardness distribution and surface carbon contamination. These problems lead to low product qualification rate, poor wear resistance and short service life, seriously restricting batch mass production.

Rexin high-temperature integrated vacuum sintering furnace is independently developed for powder metallurgy and hard alloy industry pain points. Breaking the limitations of traditional separate-process equipment, it integrates dewaxing, degassing and high-temperature sintering in one machine. Equipped with high-purity vacuum degassing system and multi-stage constant temperature soaking technology, it effectively volatilizes internal lubricant residues, eliminates microscopic pores and impurities, optimizes product metallographic structure, and significantly improves product density and mechanical stability. Compared with ordinary sintering equipment, our integrated equipment improves production efficiency by 30% and product qualification rate by over 25%, being the preferred stable production equipment for medium and high-end powder metallurgy product manufacturers.

1. Internal microscopic porosity & insufficient density Traditional rapid high-temperature sintering causes incomplete fusion between powder particles, loose blank structure and a large number of microscopic pores inside the product, resulting in insufficient density and poor compression resistance. Rexin adopts multi-stage gradient temperature rise and long-time constant temperature soaking process, which fully promotes atomic diffusion and particle bonding, eliminates internal gap defects, and maximizes product compactness and structural stability.

2. Lubricant residue & surface carbon contamination Separate dewaxing and sintering processes lead to incomplete impurity removal, residual lubricant inside the blank and surface black carbon spots, affecting product appearance and assembly accuracy. Our one-piece dewaxing & sintering design completes full volatilization and discharge of internal impurities in a high-vacuum environment, ensuring pure product metallographic structure and clean surface without secondary cleaning.

3. Uneven hardness & unstable batch performance Ordinary furnaces have uneven temperature field, resulting in inconsistent sintering degree of workpieces in different positions, large hardness difference and unstable wear resistance of batch products. Our multi-zone independent PID temperature control system realizes uniform temperature field in the furnace with temperature deviation controlled within ±3℃, ensuring consistent hardness and mechanical properties of all sintered products.

4. Surface oxidation & poor finish Atmospheric open sintering causes metal surface oxidation and discoloration, reducing product corrosion resistance and assembly precision. Full vacuum or inert gas closed protection completely isolates oxygen, realizing zero oxidation sintering, bright product surface and excellent finish.

Integrated Dewaxing & Sintering One-Piece Design: Avoids secondary workpiece handling and cross-contamination risks of separate equipment, greatly improving production efficiency and product yield, a key advantage different from ordinary split sintering furnaces.

High-Precision Vacuum Degassing System: Effectively removes internal gas and volatile impurities, completely solves product bubbling and porosity defects, and improves product compactness by 5%-8% compared with ordinary equipment.

Energy-Saving High-Density Furnace Lining: Adopts high-temperature resistant fiber lining, reduces heat loss and energy consumption, low failure rate and long service life, effectively reducing long-term production operating costs for customers.

Customizable Process Curve & Furnace Size: Supports personalized temperature curve setting and non-standard furnace cavity customization according to different material characteristics and workpiece sizes, adapting to diversified production needs.

Sintering quality is the core factor determining the mechanical properties and market competitiveness of powder metallurgy and cemented carbide products. Traditional sintering equipment cannot solve the industry’s common defects of porosity, residual impurities and uneven hardness due to process and structural limitations. Rexin integrated vacuum sintering equipment perfectly solves these pain points with mature dewaxing and sintering integrated technology, stable temperature control system and high-purity vacuum environment. We provide one-stop customized sintering solutions for global powder metallurgy manufacturers, helping customers achieve high-yield, low-cost and stable mass production.

Troubled by sintering porosity, low density and unqualified product yield? Get free professional process debugging & customized furnace solution.

Our Products: Mesh Belt Furnace, Vacuum Furnace, Box Furnace, Pit Nitriding Furnace, Brazing Line, Sintering Furnace

Related Application Industries: Heat Treatment Process, Hardware & Fasteners, Tooling & Cutting Tools, Stainless Steel Strip & Tube, New Energy Auto Parts, Powder Metallurgy, Heat Exchanger, Aluminum Alloy, Bearing Parts