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2 钎料化学成分超标原因分析及探讨钎料化学成分的保证,除原材料质量合格、称重准确、生产工艺稳定外,冶炼过程中脱氧剂覆盖剂、氧化剂及精炼剂的采用或选择也是影响因素之一。杂质元素除了控制原材料的纯度外,覆盖剂、精炼剂选用不当,也会引起杂质元素含量增高。2.1 主要元素的影响一般来讲,主要元素是比较容易控制的。在产品标准中,主要元素成分范围都比较宽,在投料时,只要稍加注意就能保证其合格。但是在生产中往往不是这样。如银基钎料,个别厂家为了降低成本,投料时把银含量尽量压低在
2 reasons for excessive chemical composition of solder brazing chemical composition and to ensure that, in addition to the quality of raw materials qualified, accurate weighing, the production process is stable, the smelting process deoxidizer covering agent, oxidant and refining agent adoption or choice is also the influencing factor one. In addition to controlling the purity of impurities in the raw material elements, covering agent, refining agent improper selection, can also cause increased impurity element content. 2.1 The main elements of the impact In general, the main elements are relatively easy to control. In the product standard, the main elements of a wide range of ingredients, when feeding, as long as a little attention to be able to ensure their compliance. But often not in production. Such as silver-based solder, individual manufacturers in order to reduce costs, feeding the silver content as low as possible