Haz Zone Sheet Metal Cutting

Reduce the surface s exposure to high heats and the haz will not spread as quickly.

Haz zone sheet metal cutting.

It s called the heat affected zone haz. The area between the melt part and the unaffected base metal undergoes chemical and structural modifications and is called heat affected zone haz. The heat affected zone can alter the sheet metal figures as declared by the rolling mill to a great extent. In welding the heat affected zone haz is the area of base material either a metal or a thermoplastic which is not melted but has had its microstructure and properties altered by welding or heat intensive cutting operations.

The haz is the area between the weld or cut and the base unaffected parent metal. Colors are caused by. The heat from the welding process and subsequent re cooling causes this change from the weld interface to the termination of the sensitizing temperature in the base metal. The thermal effect of co 2 high power laser cutting on cut surface of steel plates is investigated.

It can often be recognized by a series of brightly colored bands also visible near welds. Since the haz is localized though you ll just get a hard area only around the flame cut edges. What is the heat affected zone. A heat affected zone haz is the portion of the base metal that was not melted during brazing and cutting welding but whose microstructure and mechanical properties were altered by the heat.

A mathematical model is developed to relate the output process parameters to the input laser cutting parameters. A zone is formed between the melted metal and the unaffected base metal called the heat affected zone haz. This alteration can be detrimental causing stresses that reduce the strength of the base material leading to catastrophic failures. These changes in material property are usually as a result of welding or high heat cutting.

The effect of the input laser cutting parameters on the melted zone depth mz the heat affected zone depth haz and the microhardness beneath the cut surface is analyzed. Most sheet metal cutting techniques are based on localized melting of the material. The heat affected zone haz is a non melted area of metal that has undergone changes in material properties as a result of being exposed to high temperatures. Most sheet metal cutting techniques are based on localized melting of the material see figure 1.

When forming the haz can make it difficult to manage the bending angle because it becomes impossible to foresee how metal will behave after a heat intensive cutting process. The short answer is that a heat affected zone is an area where the metal s metallurgy is changed like it would be through heat treating. During metal cutting or metal welding the metal absorbs the generated heat. This heat transmits away from the cutting edge through the metal body as metal is a good heat conductor.