Measuring Preheat and Interpass Temperatures in Welding

In certain welding applications, the surfaces to be welded together are required to be preheated before welding commences.

The preheat temperature is defined as the minimum temperature at which the base material needs to be before any welding takes place.

For small parts, preheating is usually done on the entire part. For larger weld structures, usually only the area surrounding the weld is preheated.

Preheat temperature requirements specify a minimum preheat temperature.

Xiris’ XIR-1800 SWIR thermal camera can be used to monitor the cooling rate which is directly affected by preheat and interpass temperatures.

It can also monitor the maximum allowed interpass temperature directly, as the XIR-1800 sensitivity starts at around 250C and is sensitive enough to detect when the temperature of the previous pass is above a recommended value.

This is an application with Meltio unique wire-laser metal 3D printing technology.

Read full article:
https://blog.xiris.com/blog/measuring...

XIR-1800 Thermal Camera System:
https://info.xiris.com/xir1800-therma...