ZCuPb20Sn5(20-5)鑄造鉛青銅僅僅在(zai)少數情況(kuang)下(xia)，薄板坯連鑄(zhu)機(ji)將會與依(yi)賴堿性(xing)氧氣轉爐鋼(gang)(gang)的鋼(gang)(gang)鐵(tie)廠相(xiang)。從廢(fei)鋼(gang)(gang)中(zhong)(zhong)(zhong)遺留(liu)下(xia)來的各(ge)種殘余元(yuan)素(su)，其中(zhong)(zhong)(zhong)有(you)(you)(you)些是允(yun)許存在(zai)的，可用作(zuo)合金添加(jia)(jia)劑，補充SLA鋼(gang)(gang)中(zhong)(zhong)(zhong)的Mn。它(ta)們是Ni、Cr、Mo，這(zhe)(zhe)些元(yuan)素(su)的總和不能(neng)超過(guo)0.25～O.30。但是Cu，尤(you)其與Sn結(jie)合時(shi)，是有(you)(you)(you)害(hai)的，而且在(zai)其含量超過(guo)臨界(jie)范圍后，可能(neng)板坯中(zhong)(zhong)(zhong)的熱(re)脆性(xing)及晶問表面(mian)裂紋，這(zhe)(zhe)些元(yuan)素(su)的有(you)(you)(you)害(hai)作(zuo)用可通(tong)過(guo)下(xia)述幾種加(jia)(jia)以(yi)防止(zhi)：(a)對(dui)(dui)廢(fei)鋼(gang)(gang)加(jia)(jia)以(yi)選擇以(yi)Cu與Sn。(b)在(zai)廢(fei)鋼(gang)(gang)中(zhong)(zhong)(zhong)加(jia)(jia)入預還原鐵(tie)或碳(tan)化(hua)(hua)三鐵(tie)。(c)添加(jia)(jia)Ni。電爐鋼(gang)(gang)的高(gao)殘余氮含量(100ppm)于SLA鋼(gang)(gang)有(you)(you)(you)利(li)，它(ta)加(jia)(jia)速(su)MA氮化(hua)(hua)物而非碳(tan)化(hua)(hua)物的形(xing)成以(yi)沉淀(dian)。4.2快速(su)凝固快速(su)凝固對(dui)(dui)夾(jia)雜物的形(xing)成具有(you)(you)(you)積極(ji)影響，夾(jia)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鑄造方法：砂型(xing)鑄造

ZCuPb20Sn5(20-5)鑄造鉛青銅錫青銅(tong)10ZCuSn10Pb1,ISO牌號CuSn10P,英國(guo)BS牌號PB1,德(de)國(guo)DIN牌號G-CuSn10,意(yi)大利的找不到.砂型鑄(zhu)造時(shi)抗(kang)拉強(qiang)(qiang)(qiang)度(du)(du)(du)(du)為(wei)(wei)(wei)200MPa,屈(qu)服強(qiang)(qiang)(qiang)度(du)(du)(du)(du)為(wei)(wei)(wei)100MPa,伸(shen)長(chang)率(lv)(lv)為(wei)(wei)(wei)3%,布氏硬度(du)(du)(du)(du)為(wei)(wei)(wei)HBS 785;金屬(shu)型鑄(zhu)造時(shi)抗(kang)拉強(qiang)(qiang)(qiang)度(du)(du)(du)(du)為(wei)(wei)(wei)310MPa,屈(qu)服強(qiang)(qiang)(qiang)度(du)(du)(du)(du)為(wei)(wei)(wei)170MPa,伸(shen)長(chang)率(lv)(lv)為(wei)(wei)(wei)2%,布氏硬度(du)(du)(du)(du)為(wei)(wei)(wei)HBS 885;離(li)心鑄(zhu)造時(shi)抗(kang)拉強(qiang)(qiang)(qiang)度(du)(du)(du)(du)為(wei)(wei)(wei)330MPa,屈(qu)服強(qiang)(qiang)(qiang)度(du)(du)(du)(du)為(wei)(wei)(wei)170MPa,伸(shen)長(chang)率(lv)(lv)為(wei)(wei)(wei)4%,布氏硬度(du)(du)(du)(du)為(wei)(wei)(wei)HBS 785;連續鑄(zhu)造時(shi)抗(kang)拉強(qiang)(qiang)(qiang)度(du)(du)(du)(du)為(wei)(wei)(wei)360MPa,屈(qu)服強(qiang)(qiang)(qiang)度(du)(du)(du)(du)為(wei)(wei)(wei)170MPa,伸(shen)長(chang)率(lv)(lv)為(wei)(wei)(wei)6%,布氏硬度(du)(du)(du)(du)為(wei)(wei)(wei)HBS 885;