Copper Precipitation Hardening
Copper precipitation hardening is a process where fine copper particles are removed from a supersaturated solid solution to increase strength. This is done by thermal aging.
Physical-Chemical Action Mechanism
Copper precipitation hardening is based on the thermal aging of copper in a supersaturated solid solution. At a certain temperature, the copper starts to precipitate and leaves the crystal, making the remaining structure harder.
Metallurgical Relevance & Welding Risks
This hardening increase can lead to higher toughness, but also to problems like cracks or wear. Wrong application can make the material too hard and not formable anymore.
Workshop Practice & Action Instructions
To successfully perform copper precipitation hardening, the temperature must be precisely controlled. For steel grades like 4305X2, the hardness should be increased to HRC 36 to 38. This requires controlled cooling after welding.