A repair method for outdoor thin-walled cast iron cultural relics

Abstract

The invention discloses a method for repairing outdoor thin-walled cast iron cultural relics, including the preparation of a new type of white cast iron repair material, welding seal repair and rust-resistant and weather-resistant repair, belonging to the field of cast iron cultural relic repair. The repair material of the present invention is white cast iron of the same material. The thin-walled calcinable cast iron has mechanical properties such as weldability and corrosion resistance, and its chemical composition is similar to that of the original cultural relic material, so that the weld has high strength and is easy to polish after welding. It is especially suitable for outdoor thin-walled cast iron cultural relics Local welding repairs. The welding method of the invention has good spreadability, ensures no hot cracks and cold cracks after welding, and makes the welds have better strength and rigidity. After finishing and forming, spraying anti-rust oil can ensure the restoration of the original appearance of cultural relics with the original shape.

Description

technical field [0001] The invention belongs to the field of restoration of iron cultural relics, and in particular relates to a restoration method of outdoor thin-walled cast iron cultural relics. Background technique [0002] China invented smelting and casting technology very early, and the casting technology reached its peak in the Tang and Song Dynasties. Craftsmen mastered the technical method of annealing white cast iron with wisdom, and the cast iron buildings have experienced nearly two thousand years of wind, frost, rain and snow It has not been corroded, but still remains dark and bright. For example, the Tiejing Building, which was placed in front of the Guganming Temple in Deshan, Changde City, Hunan Province before the 1980s, is a thin-walled Tiejing Building made of white cast iron by Changde craftsmen. . In the 1980s, the Iron Sutra Building was damaged due to natural disasters and man-made disasters. In order to make this damaged iron cultural relic continu...

AI Technical Summary

Problems solved by technology

[0003] In view of the difference in chemical element content between the existing cast iron material and the welding parent material, and the use of existing welding technology to weld with the parent material, it will lead to hot cracking and cold cracking at the weld, and the annealing of the weld becomes thinner, which changes the cast iron Oxidation pathway, resulting in oxidation tendency to accelerate the speed of corrosion reaction