Heat treatment process for steel structure machining

Abstract

The invention discloses a heat treatment process for steel structure machining, and relates to the technical field of heat treatment. The heat treatment process comprises the following steps of S1, conducting first-stage heating treatment on a workpiece in a salt bath furnace at 150-450 DEG C; S2, conducting heat preservation for 48 hours, and naturally cooling to room temperature in air; S3, conducting second-stage heating treatment on the workpiece in the salt bath furnace at the temperature of 550-800 DEG C; S4, conducting heat preservation for 48 hours, and then conducting oil cooling to the room temperature in air; S5, conducting first-stage cold treatment on the workpiece in liquid nitrogen; S6, heating the workpiece in the salt bath furnace at the temperature of 550-800 DEG C; S7, conducting heat preservation for 48 hours, and then conducting oil cooling to the room temperature in air; S8, heating the workpiece in the salt bath furnace at the temperature of 150-450 DEG C; and S9, conducting heat preservation for 48 hours, and then conducting oil cooling to the room temperature in air. According to the heat treatment process, operation of refrigeration equipment and heating equipment is maintained at the same time through a heat converter, a traditional heat treatment process at the temperature being thousands of degrees centigrade is split into a plurality of sub-processes, heat is effectively utilized, the heat utilization rate is increased, and the defect that an existing heat treatment technology is too high in energy consumption is overcome.

Description

technical field [0001] The invention relates to the field of heat treatment, in particular to a heat treatment process for steel structure machining. Background technique [0002] It refers to the whole process of making the shape, size, relative position and nature of the blank into a qualified part according to the pattern and size of the drawing by using the method of mechanical processing. The processing technology is the work that the craftsman needs to do before processing. Processing errors occur during the process, resulting in economic losses. [0003] Heat treatment refers to a metal thermal processing process in which materials are heated, kept warm and cooled in a solid state to obtain the desired structure and properties. During the progression from the Stone Age to the Bronze and Iron Ages, the role of heat treatment was gradually recognized. [0004] In recent years, the heat treatment technology has used the plasma field to develop ion nitriding and carburi...

AI Technical Summary

Problems solved by technology

[0005] In order to overcome the shortcomings of the high energy consumption of the existing heat treatment technology in the above-mentioned background technology, the present invention provides a heat treatment process for steel structure machining