The continuous annealing furnace for tubular stainless steel wire is mainly composed of preheating furnace, annealing furnace, cooling water tank, ammonia decomposition furnace and coiler. Several stainless steel wires pass through the furnace core tube, and the furnace core tube is arranged in single or double layers. The heating element is made of high-quality high resistance alloy material 0cr27al7mo2. The high-quality high-temperature alloy resistance wire is processed into spiral shape. A special ceramic tube is inserted in the middle of each spiral resistance wire, which is installed above the furnace core tube and perpendicular to the length direction of the furnace core tube. The installation and maintenance are fast and convenient.

The stainless steel wire passes through the furnace core tube at a certain speed and passes through the preheating zone, annealing zone and cooling zone respectively. At the same time, the mixed gas of ammonia decomposition enters into the furnace tube, so as to achieve the purpose of bright annealing. The quality of annealed stainless steel wire is good.