Process principle of laser heat treatment

Speaking of laser heat treatment, we should all be familiar with it, because we have all heard of it. In fact, the laser heat treatment technology, as a technology that replaces high-frequency heat treatment. Is not only suitable for industrial fields, such as stamping dies, injection molds, auto parts, etc.,

But also for a wide range of fields such as shipbuilding, steel, machinery, and electronics. Applicable Yuanwei has gradually expanded to many fields that require local heat treatment to improve product hardness and strength.

What is the Heat treatment?

“Heat treatment” refers to a method of modifying the structure or properties of a metal material in various ways by heating it to a metal material.

Although calendering heat treatment technology is similar to existing high-frequency heat treatment methods in inducing changes in surface texture. Laser heat treatment methods There are more advantages, for example, after the laser heat treatment. The dimensional change of the base material is almost zero. And the surface hardness becomes higher due to the formation of a denser structure without additional cooling engineering. The laser heat treatment technology can also target the required Selective heat treatment of parts. Such as three-dimensional shaped mechanical parts and mold products, cutting edges, etc.

At the same time, by using a pyrometer to measure and control the surface temperature of the base material in real time. It can use in large batches of small batch production projects. Obtain stable heat treatment quality.

How is the Heat treatment?

After laser heat treatment, the surface hardness will vary according to the carbon content of the base material, usually maintained at a level of> 5365Hc, the effective hardening depth is about 0.8 ^ 1.5m, and the hardening range is adjusted to a few millimeters to several millimeters according to the laser power. Ten millimeters. Until the beginning of 2000, carbon dioxide lasers were mainly use for laser heat treatment projects, but with the development of a variety of high-power lasers, high power with higher absorption of metal materials favore, including semiconductor lasers and discs. Lasers and fiber lasers are heat-treate to improve the hardness and strength of products.

In terms of the basic principle of laser metal heat treatment technology, by irradiating a high-energy-density laser beam on the surface of a metal material, the temperature of the base material sharply increase until the base material is about to reach the warmth of the kitchen, and it is rapidly cooled again. This induces tissue changes on its surface. The laser chirp irradiate on the surface of the base material will converte into thermal energy, which will heat the surface of the base material, and reduce the temperature again by utilizing the heat conduction characteristics of the base material, and finally increase the hardness and strength of the material.