鉛實(shí)際不溶于黃銅內(nèi)，呈游離質(zhì)點(diǎn)狀態(tài)分布在晶界上。鉛黃銅按其組織有α和(α+β)兩種。α鉛黃銅由于鉛的有害作用較大，高溫塑性很低，故只能進(jìn)行冷變形或熱擠壓。(α+β)鉛黃銅在高溫下具有較好的塑性，可進(jìn)行鍛造。

錫黃銅

黃銅中加入錫，可明顯提高合金的耐熱性，特別是提高抗海水腐蝕的能力，故錫黃銅有“海軍黃銅”之稱。

錫能溶入銅基固溶體中，起固溶強(qiáng)化作用。但是隨著含錫量的增加，合金中會出現(xiàn)脆性的r相（CuZnSn化合物），不利于合金的塑性變形，故錫黃銅的含錫量一般在0.5%～1.5%范圍內(nèi)。

常用的錫黃銅有HSn70-1，HSn62-1，HSn60-1等。前者是α合金，具有較高的塑性，可進(jìn)行冷、熱壓力加工。后兩種牌號的合金具有(α+β)兩相組織，并常出現(xiàn)少量的r相，室溫塑性不高，只能在熱態(tài)下變形。

錳黃銅

 

SAE 67  American standard – SAE  Cu Pb15 Sn (Cu Sn7 Pb15-C), CC496K

SAE 68B  American standard – SAE  ~ SS 5716-15 (Cu Al10 Fe5 Ni5)

SAE 94, SAE 794  American standard – SAE

Cu Pb20 Sn 5 ,  (Cu Sn5 Pb20-V), CC497K

LM’s comparison list between different

norms from Copper alloys

Please read below on the wished for trade-name in the left hand column, and get it translated into LM-language on the right-hand

column. The right hand column with our name is either identical in composition or a fully replaceable alloy with only minor

differences. The column in the middle states the norm and its country of origin.

With no marks in front of LM’s alloy = alloy is identical, with this sign “~” = alloy is very similar, fully replaceable.

Product name Country of origin LM’s trade name by or order/inquiry

3A  American standard – ASTM  SS 5640-15 (Cu Pb10 Sn10), CC495K