Vertical vacuum furnace for marine diesel engine parts
Heating zone φ1500×3000 mm, 3.2 t per charge, crankshafts and liners processed in one load, 6,200 operating hours a year.
Marine parts exceed 2.5 m in length; horizontal furnaces are hard to load and gravity causes distortion.
The JVGQV-1500 vertical furnace loads from the top with an electric hoist; three independently controlled heating zones keep ±5 ℃ uniformity even at a 2:1 aspect ratio.
The shell and vacuum set are designed for 6,200 hours a year, with turbomolecular pumps, on-line leak testing and a 2,000-hour maintenance interval.
Results
3.2 t per charge, loading time cut from 4 hours to 50 minutes, unplanned downtime under 24 hours a year.
Batch vacuum brazing of aero-engine titanium blades
0.5 mm thin-wall TC4 blades, 0.05–0.1 mm gap, 240 parts per charge, 6 months of serial delivery with 99.2% first-pass yield.
Export projectVacuum diffusion bonding of titanium sandwich panels for spacecraft
800 mm sandwich parts retain 92% base-metal strength after bonding; leak rate 1×10⁻⁹ Pa·m³/s; three sets delivered, including export to Europe.
Distortion control of high-strength steel parts by high-pressure gas quench
18CrNiMo parts quenched in 10 bar nitrogen instead of oil: hardness HRC 48–51 across the charge, distortion down from 0.45 mm to 0.12 mm.
Two-chamber vacuum furnace line for transmission gears
Two chambers alternate heating and cooling on a 42-minute cycle, 1.6 t per day, linked to loading robots for unmanned operation.
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