ZCuPb20Sn5(20-5)鑄造鉛青銅僅僅在(zai)少數情況下(xia)，薄板坯連鑄機將會與依賴堿(jian)性氧氣轉爐(lu)鋼的(de)(de)(de)(de)(de)鋼鐵廠相。從(cong)廢鋼中(zhong)(zhong)遺留下(xia)來(lai)的(de)(de)(de)(de)(de)各種殘余元素(su)，其中(zhong)(zhong)有(you)些是允許存在(zai)的(de)(de)(de)(de)(de)，可(ke)用(yong)(yong)作合金(jin)添加(jia)劑，補充SLA鋼中(zhong)(zhong)的(de)(de)(de)(de)(de)Mn。它(ta)們是Ni、Cr、Mo，這些元素(su)的(de)(de)(de)(de)(de)總和不(bu)能超(chao)過0.25～O.30。但是Cu，尤其與Sn結合時，是有(you)害的(de)(de)(de)(de)(de)，而(er)且在(zai)其含量(liang)超(chao)過臨界范圍后(hou)，可(ke)能板坯中(zhong)(zhong)的(de)(de)(de)(de)(de)熱脆性及晶問表面裂紋，這些元素(su)的(de)(de)(de)(de)(de)有(you)害作用(yong)(yong)可(ke)通過下(xia)述幾種加(jia)以防(fang)止：(a)對廢鋼加(jia)以選擇以Cu與Sn。(b)在(zai)廢鋼中(zhong)(zhong)加(jia)入(ru)預還原鐵或碳化三鐵。(c)添加(jia)Ni。電爐(lu)鋼的(de)(de)(de)(de)(de)高殘余氮含量(liang)(100ppm)于SLA鋼有(you)利，它(ta)加(jia)速MA氮化物而(er)非碳化物的(de)(de)(de)(de)(de)形成以沉淀(dian)。4.2快(kuai)(kuai)速凝固快(kuai)(kuai)速凝固對夾雜物的(de)(de)(de)(de)(de)形成具(ju)有(you)積極(ji)影響，夾雜物小而(er)呈(cheng)球狀

ZCuPb20Sn5(20-5)鑄造鉛青銅

材料名稱：鑄造銅合金(20-5鉛青銅，砂型)
牌號：ZCuPb20Sn5
標準：GB/T 1176-1987
ZCuPb20Sn5特性及適用范圍：ZCuPb20Sn5(20-5)有較高的滑動性能,在缺乏潤滑介質和以水為介質時有特別好的自潤滑性能好, ZCuPb20Sn5適用于雙金屬鑄造材料,耐硫酸腐蝕,易切削,鑄造性能差。
ZCuPb20Sn5化學成份：銅 Cu ：其余錫 Sn ：4.0～6.0鋅 Zn：≤2.0(不計入雜質總和)鉛 Pb：18.0～23.0磷 P：≤0.10(雜質)鎳 Ni：≤2.5(不計入雜質總和)鋁 Al：≤0.01(雜質)鐵 Fe：≤0.25(雜質)錳 Mn：≤0.2(雜質)硅 Si ：≤0.01(雜質)銻 Sb ：≤0.75(雜質)硫 S ：≤0.10(雜質)注：雜質總和≤1.0
ZCuPb20Sn5力學性能：抗拉強度 σb (MPa)：≥150屈服強度 σ (MPa)：≥60伸長率 δ5 (％)：≥5硬度 ：≥440HB(參考值)
ZCuPb20Sn5熱處理規范：加熱溫度1200～1250℃；澆注溫度1150～1200℃。
ZCuPb20Sn5鑄(zhu)造(zao)(zao)方(fang)法(fa)：砂型鑄(zhu)造(zao)(zao)

ZCuPb20Sn5(20-5)鑄造鉛青銅錫青銅10ZCuSn10Pb1,ISO牌號(hao)(hao)CuSn10P,英國BS牌號(hao)(hao)PB1,德國DIN牌號(hao)(hao)G-CuSn10,意大利的找不到(dao).砂型鑄造時(shi)抗拉強(qiang)(qiang)度(du)(du)(du)(du)為(wei)(wei)(wei)(wei)(wei)200MPa,屈(qu)(qu)服(fu)(fu)強(qiang)(qiang)度(du)(du)(du)(du)為(wei)(wei)(wei)(wei)(wei)100MPa,伸(shen)長(chang)率為(wei)(wei)(wei)(wei)(wei)3%,布氏硬(ying)(ying)(ying)度(du)(du)(du)(du)為(wei)(wei)(wei)(wei)(wei)HBS 785;金屬型鑄造時(shi)抗拉強(qiang)(qiang)度(du)(du)(du)(du)為(wei)(wei)(wei)(wei)(wei)310MPa,屈(qu)(qu)服(fu)(fu)強(qiang)(qiang)度(du)(du)(du)(du)為(wei)(wei)(wei)(wei)(wei)170MPa,伸(shen)長(chang)率為(wei)(wei)(wei)(wei)(wei)2%,布氏硬(ying)(ying)(ying)度(du)(du)(du)(du)為(wei)(wei)(wei)(wei)(wei)HBS 885;離心鑄造時(shi)抗拉強(qiang)(qiang)度(du)(du)(du)(du)為(wei)(wei)(wei)(wei)(wei)330MPa,屈(qu)(qu)服(fu)(fu)強(qiang)(qiang)度(du)(du)(du)(du)為(wei)(wei)(wei)(wei)(wei)170MPa,伸(shen)長(chang)率為(wei)(wei)(wei)(wei)(wei)4%,布氏硬(ying)(ying)(ying)度(du)(du)(du)(du)為(wei)(wei)(wei)(wei)(wei)HBS 785;連續鑄造時(shi)抗拉強(qiang)(qiang)度(du)(du)(du)(du)為(wei)(wei)(wei)(wei)(wei)360MPa,屈(qu)(qu)服(fu)(fu)強(qiang)(qiang)度(du)(du)(du)(du)為(wei)(wei)(wei)(wei)(wei)170MPa,伸(shen)長(chang)率為(wei)(wei)(wei)(wei)(wei)6%,布氏硬(ying)(ying)(ying)度(du)(du)(du)(du)為(wei)(wei)(wei)(wei)(wei)HBS 885;