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Ok here is my question, at work, we are currently welding up these pistons, that are a diameter of 263mm, with a band of phosphorus bronze that is to be laid down, which is 40mm wide, 15mm deep around the circumference of the piston. These are new pistons for an alumina plant.Once the welding is completed, the phosphorus bronze is machined back to a diameter of 258mm.What is happening, is when the weld is laid down, there is a significant amount of porosity in the weld. Now the job is completely cleaned, it is being gripped into a rotary table and it has the right gas, wire feed, amp and volts set to the welder. All of this is fine, because we have never previously had this probelm. I am not the one weldign these pistons, but i believe it to be a problem with the heat input into the piston, because i have heard that once the bronze is heated to a certain temperature, the weld has defects such as porosity and insufficiant peno..if anyone can lighten this situation up for me it would be great because i am curious as to know why it constantly comes up with defects in the welds.sorry for the lack of info but i believe it to be an issue with the chemical make up of the phosophorus bronze and the heat input, but if any one else has any other ideas please let me know. cheers"One World...One Muay Thai...Muay Thai Never Dies..."
Reply:What is the material of the piston?
Reply:It is K1045 Mild Steel"One World...One Muay Thai...Muay Thai Never Dies..."
Reply:anyone have any ideas?"One World...One Muay Thai...Muay Thai Never Dies..." |
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发表于 2021-9-1 00:14:06