To shorten the cooling process time furnace temperature controller, trolley resistance furnace roof may be provided to accelerate the cooling exhaust. The heating apparatus is closed, cooled to a certain temperature to open, close the open side of the operation by an operator or automatically controlled by a manual mechanism to complete in an oven. Car-resistance furnace is the national standard of energy-efficient furnace operation cycle experimental furnace, mainly used for high chromium, high manganese steel castings, ductile iron, roller, ball, hammer crusher, wear-resistant liner hardening, annealing, aging and with the recent progress of the heat treatment furnace technology heat treatment of various mechanical parts are there? Compared with ordinary box-type heat treatment furnace, bath heaters and other conventional equipment carried, vacuum handling characteristics are evident as early as the heat treatment has been recognized by the majority of workers. In view of this small, fifty years, vacuum heat treatment has always been a hot international heat treatment technology development. In the past twenty years our furnace, also has been rapid development, research and application of vacuum heat treatment process throughout annealing, quenching oil, high-pressure gas quenching, carburizing, nitriding, alloying, tempering, sintering, brazing fields welding, coating, cleaning, etc., has made considerable progress. High-temperature furnace _ Longkou laboratory furnace (certified) _ furnace experiments by Longkou Furnace. Longkou experiment Furnace (www.lk-dianlu.com) is a leader in Yantai, Shandong Province, electric equipment, over the years, the company is implementing the scientific management, innovation and development, the principle of honesty and trustworthiness, and satisfy customer needs. Longkou laboratory furnace leadership with the staff warmly welcome all inquiries negotiations to create experimental furnace Longkou a better future.