Lead-free bismuth-free silicon-free brass

Abstract

The invention relates to a lead-free bismuth-free silicon-free brass alloy, comprising: by the total weight of the brass alloy, 60-65 wt % copper, 0.01-0.15 wt % antimony, 0.1-0.5 wt % magnesium, one or more element selected from the group consisting of 0.1-0.7 wt % aluminum, 0.05-0.5 wt % tin, 0.05-0.3 wt % phosphorus, 0.05-0.5 wt % manganese and 0.001-0.01 wt % boron, and a balance of zinc. The brass alloy of the invention does not adopt lead, thus avoiding lead pollution. Besides, neither bismuth nor silicon is adopted, thus enabling the brass alloy to have an improved cutting performance.

1 . A lead-free bismuth-free silicon-free brass alloy with excellent cutting performance, characterized by comprising: by the total weight of the brass alloy, 60-65 wt % copper, 0.01-0.15 wt % antimony, 0.1-0.5 wt % magnesium, and a balance of zinc. 
     
     
         2 . The brass alloy of  claim 1 , characterized by further comprising: 0.05-0.3 wt % phosphorus and/or 0.05-0.5 wt % manganese by the total weight of the brass alloy. 
     
     
         3 . The brass alloy of  claim 1 , characterized by further comprising: 0.05-0.5 wt % manganese, 0.1-0.7 wt % aluminum, 0.05-0.5 wt % tin, 0.05-0.3 wt % phosphorus and/or 0.001-0.01 wt % boron by the total weight of the brass alloy. 
     
     
         4 . The brass alloy of  claim 3 , characterized in that a total content of manganese, aluminum, tin, phosphorus and/or boron is not larger than 2 wt % of the total weight of the brass alloy. 
     
     
         5 . The brass alloy of  claim 4 , characterized in that a total content of manganese, aluminum, tin, phosphorus and/or boron is not less than 0.2 wt % of the total weight of the brass alloy. 
     
     
         6 . The brass alloy of  claim 3 , characterized by further comprising: unavoidable impurities which comprise, by the total weight of the brass alloy, 0.25 wt % or less nickel, 0.15 wt % or less chrome and/or 0.25 wt % or less iron. 
     
     
         7 . A lead-free bismuth-free silicon-free brass alloy with excellent cutting performance, characterized by comprising: by the total weight of the brass alloy, 60-65 wt % copper, 0.05-0.5 wt % tin, and two or more elements selected from the group consisting of 0.1-0.7 wt % aluminum, 0.05-0.3 wt % phosphorus and 0.05-0.5 wt % manganese by the total weight of the brass alloy, and a balance of zinc. 
     
     
         8 . The brass alloy of  claim 7 , characterized by further comprising: 0.01-0.15 wt % antimony, 0.1-0.5 wt % magnesium and/or 0.001-0.01 wt % boron by the total weight of the brass alloy. 
     
     
         9 . The brass alloy of  claim 8 , characterized by further comprising: unavoidable impurities which comprise, by the total weight of the brass alloy, 0.25 wt % or less nickel, 0.15 wt % or less chrome and/or 0.25 wt % or less iron. 
     
     
         10 . A lead-free bismuth-free silicon-free brass alloy with excellent cutting performance, characterized by comprising: by the total weight of the brass alloy, 60-65 wt % copper, 0.01-0.15 wt % antimony and 0.1-0.5 wt % magnesium, and one or more element selected from the group consisting of 0.1-0.7 wt % aluminum, 0.05-0.5 wt % tin, 0.05-0.3 wt % phosphorus, 0.05-0.5 wt % manganese and 0.001-0.01 wt % boron by the total weight of the brass alloy, and a balance of zinc. 
     
     
         11 . The brass alloy of  claim 10 , characterized by further comprising: unavoidable impurities which comprise, by the total weight of the brass alloy, 0.25 wt % or less nickel, 0.15 wt % or less chrome and/or 0.25 wt % or less iron.