How To Weld Cast Iron With Oxy Acetylene. Use of a gas flame to heat the casting to its melting point is time consuming and can lead to surface oxidation but the high preheat of the base metal and the low cooling rate which results ensure that formation of hard phases such as martensite in the HAZ can be avoided. This shows the crack prepped for welding.
This is after the Fusion Welding and shows the weld rough ground to conform to the original casting. Cast iron electrodes and copper zinc electrodes are both suitable for oxy acetylene welding of cast iron. You can choose either cast iron or copper zinc electrodes for welding cast iron using this technique.
Use of a gas flame to heat the casting to its melting point is time consuming and can lead to surface oxidation but the high preheat of the base metal and the low cooling rate which results ensure that formation of hard phases such as martensite in the HAZ can be avoided.
Oxy-Acetylene welding works on a simple concept that is bring two pieces of metals together such that their edges are touching. To weld cast iron stick welding is the preferred method and you dont need any Oxy acetylene torch for it. If we change the graphitic into combined we have. The head is pre-heated to approximately 1800 degrees where it was Fusion Welded using Oxy-Acetylene and bare cast iron rod.