Tue, 25 Sep 2018 05:39:41 +0000
vacuum heat treatment technical advantages
What are the technical advantages of vacuum heat treatment?
Vacuum heat treatment is a metal heat treatment process in which the metal workpiece is heated under 1 atmospheric pressure (that is, under negative pressure). Vacuum heat treatment can avoid oxidation, decarbonization, greatly improve the hardness, reduce brittleness, and at the same time, degreasing and degassing. These characteristics of vacuum heat treatment can greatly improve the cleanliness of workpiece surface. The mold becomes relatively brighter, reducing the deformation of the workpiece and the hardness of the workpiece after vacuum heat treatment is 3-5 times that of ordinary heat treatment. For some high-value precision parts, such as large precision mold is particularly important, vacuum heat treatment greatly improved its service life, the final result of the original enterprise used 10 precision molds a year, now only need to use 2-3 precision molds. Enterprises have greatly saved production costs and improved economic efficiency.
Vacuum heat treatment can be used in annealing, degassing, solid solution heat treatment, quenching, tempering and precipitation hardening processes. It can also be used for chemical heat treatment after proper medium is introduced.
The successful development and application of computer simulation technology for heat treatment process, including microstructure simulation and performance prediction technology, make it possible for intelligent heat treatment of die. Because of the characteristics of small batch (or even single piece) and multi-variety of mold production, and the characteristics of high heat treatment performance and no waste products, intelligent heat treatment of mold becomes necessary.
Intelligent heat treatment of dies includes: defining the structure, material and heat treatment performance requirements of dies; computer simulation of temperature field and stress field distribution in heating process of dies; computer simulation of temperature field, phase transformation process and stress field distribution in cooling process of dies; simulation of heating and cooling process; formulation of quenching process; hot spot; Automatic control technology for equipment. Foreign developed countries, such as the United States, Japan, etc., have already carried out the research and development of this technology in the field of vacuum and high pressure gas quenching, mainly aiming at the mold.