The figures below (Fig. 4 and Fig. 5) show the effects of welding spatter on the nitrided surface, where clear cracking and crumbling and peeling of the layer can be seen. (Drawings provided from article, page 158<\/em>)<\/p>\n\n\n\n

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Rys. 4. <\/em><\/strong>View of the crushed nitrided layer, which was thermally affected by a droplet of spallation metal, seen at top left<\/em> <\/figcaption><\/figure>\n<\/div><\/div>\n<\/div>\n\n\n\n
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Rys. 5.<\/strong> View of the crushed nitrided layer, which was thermally affected by a droplet of metal spallation <\/figcaption><\/figure>\n<\/div>\n<\/div>\n\n\n\n
Studies have shown that welding spatter has a temperature that causes thenitrided surface to degrade rapidly<\/strong>. In turn, the electric arc causes the nitrides to break down, making the hard surface become porous and fail to perform its function.<\/strong><\/p>\n\n\n\n
As the figures (Figure 6 and Figure 7) show, the action of the arc causes the nitrides to break down and form a porous, damaged surface. (Drawings provided from article, page 159<\/em>)<\/p>\n\n\n\n
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$\"Rys.6.$
Rys.6.<\/strong> View of the effects of thermal arc ignition on the nitrided layer and substrate material. Nitrided layer degraded as a result of nitrogen evaporation (top). Bottom: transformation products of overcooled austenite, formed under rapid cooling conditions. <\/em> <\/figcaption><\/figure>\n<\/div>\n\n\n\n
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Rys. 7.<\/strong> View of the effects of thermal arc ignition on the nitrided layer and substrate material. Top: Nitrided layer degraded by evaporation of nitrogen. Bottom: transformation products of overcooled austenite, formed under rapid cooling conditions. <\/em> <\/figcaption><\/figure>\n<\/div>\n<\/div>\n\n\n\n
Nitrided welding tables - more problems than benefits.<\/em><\/strong> <\/h2>\n\n\n\n
Although nitriding seems sensible at first glance, in practice the nitrided layer is too brittle to withstand the harsh welding conditions. Instead of protecting the table, it cracks due to heat and spatter. <\/strong><\/p>\n\n\n\n
The nitrided layer does not make the welding tables resistant to the degrading effects of welding spatter and seizures. <\/strong> As a result of the thermal effects of liquid metal droplets, transverse cracks, longitudinal cracks and delamination form in the nitrided layer. In the process of splatter removal, fragments of the nitrided layer are peeled off from areas where it has degraded.<\/strong><\/p>\n\n\n\n
Conclusions for customers<\/strong> <\/h3>\n\n\n\n
If you want a durable welding table, it is better to avoid nitrided models<\/strong>. Although this process promises hardness and resilience, in reality these tables quickly deteriorate under welding<\/strong>. Instead of overpaying for nitriding, it is worth investing in robust welding tables without this layer<\/strong>. Tables made of durable steel, without unnecessary additional coatings, will perform better in tough welding conditions and are more resistant to heat and damage. The only way to prevent spatters from sticking is to use a proven anti-spatter chemical.<\/p>\n\n\n
PL Degradacja warstwy azotowanej stali pod dzia\u0142aniem odprysk\u00f3w spawalniczych i zajarze\u0144 \u0142uku elektrycznego.<\/div>