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四、加入其他元素对铜铅合金的影响铜铅合金中所含的其他元素,有的是不可避免的杂质,有的是为改善合金的机械性能和金相组织而故意加进去的,有的是为脱氧而加进去的。下面是铜铅合金中所含几种主要元素对合金的影响:锡——加入锡能增加合金的机械性能(如硬度、强度、耐疲性),但能减少铅在铜中的溶解度。把含铅25％的铜铅合金加入不同量的锡,配好料之后倒入6时×2时的小钢筒内,放入定温电炉中加热20分钟,然后取出来在水中急冷(需注意不要搅动),得到的金相试验结果如[表九]所示。由[表九]可以明显的看出,含锡量愈高,铅愈难溶解。
Fourth, the addition of other elements on the impact of copper and lead alloys Other elements contained in copper-lead alloys, some inevitable impurities, and some are to improve the mechanical properties and microstructure of the alloy deliberately added, and some added for the deoxidation of. The following are the effects of several major elements contained in copper-lead alloys on the alloys: Tin - Tin addition can increase the mechanical properties (eg hardness, strength, fatigue resistance) of the alloy but reduce the solubility of lead in copper. The lead-25% lead-copper alloy into a different amount of tin, with good materials and then poured into 6 hours × 2 hours of small steel tube, placed in a constant temperature electric furnace heated for 20 minutes, and then taken out in the water quench (attention Do not stir), the metallographic test results obtained as shown in [Table IX]. As can be clearly seen from Table 9, the higher the tin content, the harder lead is to dissolve.