The principles of elements choice of lead free cutting brass was expatiated.It was pointed out that the lead in lead-brass or bismuth in bismuth-brass is replaced by dispersive intermetallics.

• 根据金属材料的切削机理和铜合金的基本性质,阐述无铅易切削铜合金成分选择的基本思路,提出以弥散分布的金属间化合物代替易切削铅黄铜中的铅或无铅铋黄铜中的铋,从而实现易切削黄铜的无铅化。