灰口铸铁气焊时气孔的产生及防止

• 作 者: 骆材
• 机 构: 大连柴油机厂,
• 出 处: 焊接
• 发表日期: 1971年01期
• 关键词: 气孔 灰口铸铁 焊缝金属 片状分布 熔池 母材 球墨铸铁 焊条 熔化状态 施焊

灰口铸铁气焊时,较容易产生气孔,产生的原因,主要是铸铁中的碳和硅的气体,在焊缝金属冷却时没能析出所致。它主要是在母材与焊肉之间以片状分布,如果不及时根除,将会贯穿整个焊接过程而造成废品。其防止办法:1.冷焊时,要使被焊部分周围予热(600℃),熔池应尽可能大些;

Gray cast iron gas welding, the more prone to stomatal, resulting in the main reason is cast iron in the carbon and silicon gas, the weld metal cooling can not be precipitated. It is mainly in the form of sheet metal between the parent material and welding meat, if not eradicated, will be through the entire welding process and waste. The way to prevent: 1. Cold welding, to be welded around the part to be heated (600 ℃), the pool should be as large as possible;