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Copper-Zinc brazing alloys are suitable for gas-flame brazing, high temperature brazing,salt bath dip brazing of copper and copper alloys, nickel, cast iron and hard alloys. While brazing by oxyacetylene, to heat with oxidized flame quickly can lessen evaporation of Zinc and prevent gas porosity due to over-oxidization. The optimum joint gap should be 0.025-0.1mm. Flux is also necessary for good seam.
Attention:The residue such as grease,oxide etc on the surface and connection must be removed strictly before the brazing.
| 中國標準牌號 Chinese Standard |
相當牌號 Equivalent Grade |
化學成分(Wt%) Composition |
熔化溫度范圍(℃) Melting Range |
主要特性及用途 Characteristics and Application |
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| 產(chǎn)品樣本牌號 | AWS A5.8 | Cu | Zn | Mn | Sn | Fe | Si | 固相線 Solidus |
液相線 Liquidus |
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| B-Cu58ZnMn | 料105 | ___ | 57 ～ 59 |
余 rem. | 3.7 ～ 4.3 |
___ | 0.15 | ___ | 880 | 909 | 錳可提高釬料的強度、延性和對硬質(zhì)合金的潤濕能力，用于硬質(zhì)合金刀具、模具及采礦工具的釬焊。 |
| B-Cu60ZnSn-R | 絲 221 | RBCuZn-A | 59 ～ 61 |
余 rem. | ___ | 0.8 ～ 1.2 |
___ | 0.15 ～ 0.35 |
890 | 905 | 可取代H62釬料以獲得更致密的釬縫，尚可作為氣焊黃銅用的焊絲。 |
| B-Cu48ZnNi-R | ___ | RBCuZn-D | 46 ～ 50 |
余 rem. | ___ | Ni 9.0 ～ 11.0 |
___ | 0.04 ～ 0.25 |
921 | 935 | 用于有一定耐熱要求的低碳鋼、鑄鐵、鎳合金零件的釬焊，對硬質(zhì)合金工具也有良好的潤濕能力。 |