Special-purpose alloy powder for repairing archaic bronze chime

Abstract

The invention discloses special alloy powder for repairing an ancient bronze bell set. The compositions and the weight percent of the special alloy powder are as follows: 65 to 95 percent of copper, 1 to 30 percent of tin and 0.5 to 10 percent of plumbum.Through the reasonable design of the compositions of the alloy powder, the invention enables the compositions of weld metals be close to the compositions of base materials of the ancient bell set as much as possible by control of the burning loss content of plumbum element and tin element during the process of laser welding, thereby the difference of physical properties between welded seams and the base materials is reduced as much as possible, and then laser welding repair is finally realized and the sound and the shape of the ancient bronze bell set are restored simultaneously. The special alloy powder for repairing the ancient bronze bell set is significant for repair of ancient bronze cultural relics and protection of the cultural relics in China.

Description

technical field [0001] The invention relates to an alloy powder, specifically an alloy powder mainly used for repairing bronze devices by laser welding. Background technique [0002] my country is a country with ancient civilization. As early as 3,000 years ago, it mastered the casting technology of bronze devices, and a large number of ancient bronze devices are unearthed every year. Because these bronzes were buried in the ground for too long, not only the typical defects such as rusting occurred, but even fracture occurred in many cases. As the cultural relics were severely damaged, their archaeological value and scientific research value were greatly affected. Take the chime bells recently unearthed from the Jiuliandun ancient tomb in Suizhou City, Hubei Province as an example. Due to the age of burial in the ground and the influence of tomb robbery, 6 of the 34 chime bells unearthed in this set were seriously damaged. , one of which even became fragments. So far, the...

AI Technical Summary

Problems solved by technology

Since the objects to be welded are thin-walled parts and the welding gap is narrow, and there is no problem requiring bronze swords and bronze mirrors to restore sound, no additional filler material is used in the laser welding process

For most ancient bronze chimes, due to long-term natural corrosion and careless operation during the unearthed process, most of the parts to be repaired have large welding gaps, and some parts even have obvious missing blocks, and the wall thickness of the chimes is also very large. Most of them are higher than 1mm (generally in the range of 3-10mm)

Obviously, it is difficult to achieve a complete repair of the repaired part by pure laser welding, and filler materials must be added to make the part to be welded into a whole