Emergent furnace door opening treatment method of soft nitriding furnace

Abstract

The invention relates to the technical field of soft nitriding heat treatment and specifically to an emergent furnace door opening treatment method of a soft nitriding furnace. The method comprises the steps of: closing a gas supply system and all heating equipment systems in the furnace, while not closing a circulating blower in the hearth of the soft nitriding furnace; emergently flushing and sweeping the hearth for an hour according to furnace pressure fault treatment steps, regulating the control systems in the steps of the equipment to operate to the safe initial states of the steps, andclosing the equipment operation control; reducing the nitrogen flow rate after flushing and sweeping the hearth, continuously introducing nitrogen to the hearth of the soft nitriding furnace at a speed of 2-2.5 cubic meter per hour; opening the hearth door of the soft nitriding furnace if the temperature of the soft nitriding furnace is lower than 200 DEG C, and treating a fault. When being used for treating faults in the soft nitriding furnace, the invention has the advantages of preventing quality mutation of products in the hearth, reducing rejection rate of the products and reducing the production cost.

Description

technical field [0001] The invention relates to the field of nitrocarburizing heat treatment technology, in particular to a treatment method for emergency opening of a nitrocarburizing furnace door. Background technique [0002] In the actual production of the nitrocarburizing heat treatment process, due to some accidents in the furnace, the products in the nitrocarburizing furnace cannot be operated normally within 30 minutes, and at the same time, the furnace door in the nitrocarburizing furnace needs to be opened to solve the fault. , The product will be scrapped due to improper handling of the product, resulting in peeling off of the product surface and abnormal changes in the metallographic structure. Contents of the invention [0003] In order to overcome the above defects, the technical problem to be solved by the present invention is to provide a treatment method for emergency opening of the nitrocarburizing furnace. Can reduce the scrap rate of the product. [0...

AI Technical Summary

Problems solved by technology

[0005] ① When an accident occurs and the furnace door in the nitrocarburizing furnace needs to be opened to solve the fault, the gas supply system and all heating equipment systems in the furnace should be turned off, and the circulating fan of the nitrocarburizing furnace should not be turned off;