CW610N-R450铜合金板材,CW610N-R450
通常采用一些强化工艺来改善铝青铜合金组织状态以达到所需要的使用性质和工艺性能。铝青铜合金的强化主要手段有固溶强化、细晶强化、时效强化等。固溶强化就是将合金加热到能使铝、锰等合金元素全部或zui大限度的溶入铜基体中形成饱和或过饱和固溶体后,淬火至室温得到过饱和固溶体的工艺。然而,这种过饱和固溶体在室温或较高温度下将发生分解而析出di二相,这种析出可使合金的强度、硬度显著增加,这就是时效强化。固溶与时效往往配合使用来改善铝青铜合金的性能。
焊接铝青铜的主要困难是铝的氧化,生成致密而难熔的Al2O3薄膜覆盖在熔滴和熔池表面。易在焊缝中产生夹渣、气孔和未熔合等缺陷。清除铝的氧化物和防止铝的氧化成为焊接铝青铜成败的关键。此外w(Al)<7%的单相铝青铜具有热脆性,在热影响区易产生裂纹,比较难焊。w(A1)≥7%的单相合金和双相合金,采取一些防裂措施是可以焊接的。
一般不推荐采用气焊,因为很难完全消除铝的氧化物有害作用。如果必须采用气焊,则须对焊丝、焊接坡口作彻底清理,使用含氯化盐和氟化盐的熔剂。严格采用中性焰等措施。
JM 1 Johnson metall / Own brand name on Swedish standard Rg7 (Cu Sn7 Zn4 Pb7), CC493K
JM 2 Johnson metall / Own brand name on Swedish standard SS 5443-15 (Cu Sn10), CC480K
JM 3 Johnson metall / Own brand name on Swedish standard SS 5465-15 (Cu Sn12), CC483K
JM 4 Johnson metall / Own brand name on Swedish standard Cu Pb15 Sn (Cu Pb15 Sn7), CC496K
JM 5 Johnson metall / Own brand name on Swedish standard SS 5640-15 (Cu Pb10 Sn10), CC495K
JM 6 Johnson metall / Own brand name on Swedish standard SS 5710-15 (Cu Al10 Fe3), CC331G
JM 7 Johnson metall / Own brand name on Swedish standard SS 5716-15 (Cu Al10 Ni5 Fe4 F70), AB-200
JM 7-20 Johnson metall / Own brand name on Swedish standard SS 5716-20 (Cu Al10 Ni5 Fe4 F74), AB-220 Ni
JM 9 Johnson metall / Own brand name on Swedish standard Cu Sn12 Ni (Cu 88 Sn10 Ni2), CC484K
JM 11 Johnson metall / Own brand name on Swedish standard SS 5475 (Cu Sn14)
JM 12 Johnson metall / Own brand name on Swedish standard SS 5458 (Cu Sn10 Zn2), CC482K
JM 14 Johnson metall / Own brand name on Swedish standard Cu Pb20 Sn 5 , (Cu Sn5 Pb20-V), CC497K
JM 15 Johnson metall / Own brand name on Swedish standard SS 5256 (Cu Zn35 Al1), ~CW710R (CuZn35Ni2)
JM18 Johnson metall / Own brand name on Swedish standard SS 5234 (Cu Zn25 Al 5, SoMsF75), CC762S
JM 100 Johnson metall / Own brand name on Swedish standard SS 5015, SF-Cu, CW024A
NS 16304 Norwegian standard / NS Cu Sn4 (DIN 17662, W-Nr.2.0116)
NS 16306 Norwegian standard / NS Cu Sn6, CW452K
焊条电弧焊一般用于铝青铜锻件或铸件的焊补。采用ECuAl-c(即T237)焊条。除薄件(≤3mm)外,需采用70°~90°的V形坡口;薄件常不预热,对于 w(Al)<10%的合金,预热和层间温度一般不应超过150℃。焊接铝含量为10%~13%的铝青铜,厚工件推荐预热和层间温度约260℃,焊件宜快速冷却。采用直流反接,短弧和窄焊道施焊。多层焊时层间必须彻底清渣。