铅黄铜的切削性较好,对人和环境有害,而铋黄铜属于无铅环保黄铜,对人和环境无害。以铅黄铜HPb59-1的切削性能为标准,选用0.3%、0.6%、0.9%的铋黄铜为样品,从刀具耐用度、表面粗糙度、切屑形态三个方面研究铋含量对黄铜切削性能的影响。通过实验结果对比可知,铋含量为0.9%无铅铋黄铜的切削性较好,接近铅黄铜的切削性能。通过对工艺参数进行优化得出,铋黄铜在转速n=1400r/min、刀具前角r=240、背吃刀量ap=0.02mm工艺条件下切削性能较好。 Lead brass machinability is good, harmful to people and the environment, and bismuth brass are lead-free environmentally friendly brass, harmless to humans and the environment. Taking bismuth brass with 0.3%, 0.6% and 0.9% as the cutting performance of the lead brass HPb59-1, the effects of bismuth content on the brass cutting were studied from the aspects of tool durability, surface roughness and chip morphology The impact of performance. The experimental results show that the bismuth content of 0.9% lead-free bismuth brass machinability is good, close to the cutting performance of lead brass. Through the optimization of the process parameters, the bismuth brass has better cutting performance under the conditions of n = 1400r / min, r = 240 before the tool and ap = 0.02mm on the back.