CW458K CuSn5Pb1錫青銅棒

強(qiáng)化

通常采用一些強(qiáng)化工藝來(lái)改善鋁青銅合金組織狀態(tài)以達(dá)到所需要的使用性質(zhì)和工藝性能。鋁青銅合金的強(qiáng)化主要手段有固溶強(qiáng)化、細(xì)晶強(qiáng)化、時(shí)效強(qiáng)化等。固溶強(qiáng)化就是將合金加熱到能使鋁、錳等合金元素全部或zui大限度的溶入銅基體中形成飽和或過(guò)飽和固溶體后，淬火至室溫得到過(guò)飽和固溶體的工藝。然而，這種過(guò)飽和固溶體在室溫或較高溫度下將發(fā)生分解而析出di二相，這種析出可使合金的強(qiáng)度、硬度顯著增加，這就是時(shí)效強(qiáng)化。固溶與時(shí)效往往配合使用來(lái)改善鋁青銅合金的性能。

C19000 C19002 C19010 C19015 C19020 C19022 C19024 C19025 C19027 C19030 C19040 C19050 C19100 C19140 C19150 C19160 C19170 C19200 C19210 C19215 C19220 C19240 C19250 C19260 C19280 C19400 C19410 C19419 C19450 C19500 C19520 C19600 C19700 C19710 C19720 C19750 C19800 C19810 C19900 C19910 C20500 C21000 C22000 C22600 C23000 C23030 C23400 C24000 C24080 C25000 C25600 C26000 C26100 C26130 C26200 C26380 C26800 C27000 C27200 C27400 C27450 C27451 C27453 C28000 C28200 C28300

焊接鋁青銅的主要困難是鋁的氧化，生成致密而難熔的Al2O3薄膜覆蓋在熔滴和熔池表面。易在焊縫中產(chǎn)生夾渣、氣孔和未熔合等缺陷。清除鋁的氧化物和防止鋁的氧化成為焊接鋁青銅成敗的關(guān)鍵。此外w(Al)<7%的單相鋁青銅具有熱脆性，在熱影響區(qū)易產(chǎn)生裂紋，比較難焊。w(A1)≥7%的單相合金和雙相合金，采取一些防裂措施是可以焊接的。