ZCuPb20Sn5(20-5)鑄造鉛青銅僅(jin)僅(jin)在少數情況下，薄(bo)板(ban)坯連(lian)鑄機將(jiang)會與依賴(lai)堿性氧氣轉(zhuan)爐(lu)(lu)鋼(gang)(gang)(gang)的(de)(de)鋼(gang)(gang)(gang)鐵(tie)廠相。從廢(fei)鋼(gang)(gang)(gang)中(zhong)遺留(liu)下來的(de)(de)各(ge)種殘(can)(can)余(yu)元(yuan)素，其(qi)中(zhong)有些(xie)是(shi)允許存在的(de)(de)，可(ke)用作合金添加(jia)劑，補充SLA鋼(gang)(gang)(gang)中(zhong)的(de)(de)Mn。它(ta)們是(shi)Ni、Cr、Mo，這(zhe)些(xie)元(yuan)素的(de)(de)總(zong)和不(bu)能超過(guo)0.25～O.30。但(dan)是(shi)Cu，尤其(qi)與Sn結合時(shi)，是(shi)有害的(de)(de)，而且(qie)在其(qi)含(han)量超過(guo)臨界范圍后(hou)，可(ke)能板(ban)坯中(zhong)的(de)(de)熱脆性及晶問表面裂紋，這(zhe)些(xie)元(yuan)素的(de)(de)有害作用可(ke)通(tong)過(guo)下述幾種加(jia)以(yi)(yi)防止：(a)對(dui)廢(fei)鋼(gang)(gang)(gang)加(jia)以(yi)(yi)選擇(ze)以(yi)(yi)Cu與Sn。(b)在廢(fei)鋼(gang)(gang)(gang)中(zhong)加(jia)入預還(huan)原鐵(tie)或(huo)碳(tan)化(hua)三鐵(tie)。(c)添加(jia)Ni。電爐(lu)(lu)鋼(gang)(gang)(gang)的(de)(de)高殘(can)(can)余(yu)氮(dan)含(han)量(100ppm)于(yu)SLA鋼(gang)(gang)(gang)有利，它(ta)加(jia)速MA氮(dan)化(hua)物而非碳(tan)化(hua)物的(de)(de)形成(cheng)(cheng)以(yi)(yi)沉淀(dian)。4.2快(kuai)速凝固快(kuai)速凝固對(dui)夾雜物的(de)(de)形成(cheng)(cheng)具有積極影(ying)響，夾雜物小而呈球狀

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鑄造(zao)(zao)方法(fa)：砂型鑄造(zao)(zao)

ZCuPb20Sn5(20-5)鑄造鉛青銅錫青銅10ZCuSn10Pb1,ISO牌號(hao)CuSn10P,英國BS牌號(hao)PB1,德國DIN牌號(hao)G-CuSn10,意(yi)大利的找不到.砂(sha)型鑄造(zao)時抗(kang)拉(la)強(qiang)(qiang)(qiang)度(du)(du)(du)(du)(du)為(wei)(wei)(wei)(wei)(wei)200MPa,屈服強(qiang)(qiang)(qiang)度(du)(du)(du)(du)(du)為(wei)(wei)(wei)(wei)(wei)100MPa,伸長率(lv)為(wei)(wei)(wei)(wei)(wei)3%,布(bu)氏(shi)(shi)硬度(du)(du)(du)(du)(du)為(wei)(wei)(wei)(wei)(wei)HBS 785;金屬(shu)型鑄造(zao)時抗(kang)拉(la)強(qiang)(qiang)(qiang)度(du)(du)(du)(du)(du)為(wei)(wei)(wei)(wei)(wei)310MPa,屈服強(qiang)(qiang)(qiang)度(du)(du)(du)(du)(du)為(wei)(wei)(wei)(wei)(wei)170MPa,伸長率(lv)為(wei)(wei)(wei)(wei)(wei)2%,布(bu)氏(shi)(shi)硬度(du)(du)(du)(du)(du)為(wei)(wei)(wei)(wei)(wei)HBS 885;離(li)心鑄造(zao)時抗(kang)拉(la)強(qiang)(qiang)(qiang)度(du)(du)(du)(du)(du)為(wei)(wei)(wei)(wei)(wei)330MPa,屈服強(qiang)(qiang)(qiang)度(du)(du)(du)(du)(du)為(wei)(wei)(wei)(wei)(wei)170MPa,伸長率(lv)為(wei)(wei)(wei)(wei)(wei)4%,布(bu)氏(shi)(shi)硬度(du)(du)(du)(du)(du)為(wei)(wei)(wei)(wei)(wei)HBS 785;連續鑄造(zao)時抗(kang)拉(la)強(qiang)(qiang)(qiang)度(du)(du)(du)(du)(du)為(wei)(wei)(wei)(wei)(wei)360MPa,屈服強(qiang)(qiang)(qiang)度(du)(du)(du)(du)(du)為(wei)(wei)(wei)(wei)(wei)170MPa,伸長率(lv)為(wei)(wei)(wei)(wei)(wei)6%,布(bu)氏(shi)(shi)硬度(du)(du)(du)(du)(du)為(wei)(wei)(wei)(wei)(wei)HBS 885;