Industrial Furnace

工业炉的热处理、烧结与气氛控制工艺需要精确的气体配比与稳定的流量控制。我们的流量控制产品帮助炉体实现可控气氛（氮气、氢气、氩气等）的精确供给，保障热处理质量与工艺一致性。

Atmosphere control in industrial furnaces (heat treatment, carburizing, annealing, sintering) directly determines surface quality and mechanical properties of metal parts. A controlled atmosphere is a gas mixture held within prescribed composition limits — it prevents oxidation and decarburization and can actively alter surface chemistry (carburizing, carbonitriding).

Nitrogen-based atmospheres are the workhorse: high-purity N₂ protects against oxidation/decarburization for protective heating, neutral quenching, and bright annealing, and also purges, vents, seals furnace doors, and safeguards hydrogen systems. Hydrogen is a reducing gas that removes surface oxides, ideal for bright treatment of high-chrome and stainless steels and silicon steel, though it demands explosion safety. Endothermic atmosphere (~CO 20–24%, H₂ 30–40%, N₂ 38–45%) is composition-stable and used for gas carburizing and carbonitriding.

Carbon-potential control is the core of carburizing: controlling the CO₂/CO and H₂O/H₂ ratios steers the reaction direction. Zirconia oxygen probes respond in <1 s with ±0.03%C accuracy — the most widely used carbon-potential sensor — often paired with a CO infrared analyzer for natural-gas atmospheres.

Flow control underpins atmosphere stability: mass flow meters precisely set each gas ratio and flow under PLC closed-loop control; when carbon potential falls below setpoint, the system increases enriching gas (natural gas, propane, methane). Furnace sealing, atmosphere uniformity (circulation fans, multi-point injection), and explosion safety (N₂ door curtains) are equally essential.

HNR supplies gas blending, mass flow control, and furnace pressure regulation for controlled-atmosphere and vacuum furnaces, supporting automatic carbon-potential control and stable heat-treatment quality.