上海斯米克银钎料基本知识钎焊溶剂：在焊接过程中，配合银焊条共同使用，以保证钎焊过程顺利进行和获得严密的接头，改善银焊条对母材的润湿作用，清除液体钎料和表面氧化物，使银焊条和母材免于氧化。焊剂分为非腐蚀性焊剂和活性化焊剂，非腐蚀性焊剂有硼砂和硅酸等，活性化焊剂是在非腐蚀性焊剂中加入一定量的氟化钾、氟化钠或绿化钾、绿化钠。活性化焊剂具有很强的清除金属氧化物和杂物的作用，但对金属有腐蚀作用，焊接完成后，焊接处残留的焊剂和焊渣要进行清除。 3气焊溶剂（简称助焊剂）：供氧-乙炔焰进行气焊时的助焊剂，其作用是用以驱除焊接过程形成的氧化物，改善润湿性能，并起精练作用，以获得严密的焊缝组织。 二、钎焊工艺要求 1选用银焊丝及焊剂在我们所认为的都是根据焊件材料来进行的。故提高了焊接缝金属的抗裂性及耐腐蚀性能。 用途：用于相同类型的超低碳不锈钢材料（如尿素合成塔衬里）及异种钢焊接。上海斯米克银钎料是指涂有以不锈钢为源料的一类焊条。可分为铬不锈钢焊条和铬镍不锈钢焊条，上海斯米克银钎料广泛应用于化工、化肥、石油、医疗机械制造等行业。 性能要求: 上海斯米克银钎料除了要满足一般焊接工艺性能和焊接接头力学性能外，药芯焊丝还要确保焊接接头能满足一定的耐蚀性的要求。对药皮和焊芯，上海斯米克银钎料通常都要考虑到下列要求： 1)通过焊芯和药皮过渡各种合金元素，药芯焊丝和手工焊条那个强度大上海斯米克银钎料使焊缝金属成为含有确定数量的奥氏体和铁素体组织，以确保焊缝金属既有良好的抗裂性，不锈钢焊条又有良好的抗相应介质腐蚀的能力。
上海斯米克银钎料基本知识焊丝端头与熔池接触，并与火焰一起沿焊缝移动，焊炬不作横向摆动，焊速要快，并尽量避免中断。预热与层间温度：低温环境下的预热温度应稍高于常温下的钴基焊条焊接钢结构预热温度，加热区域为构件焊接区各方向大于或等于二倍钢板厚度且不小于100毫米范围内的母材，焊接层间温度不低于预热温度或标准（JGJ81-2002）规定的最低温度20℃(两者取高值)加大定位焊时的热输入：适当加大定位焊的热输入，增大焊缝截面和长度，并采用与正式焊接相同的预热条件，不在坡口以外的母材上打弧，熄弧时弧坑一定要填满，可以有效减少由于定位焊接引起的收缩裂纹.焊丝生产效率高、成分调节灵活、电弧稳定、焊接飞溅小和全位置焊接工艺性能良好，所以子啊焊材中的地位越来越重要，有逐渐取代手工电焊条和实芯焊丝的趋势。安全卫生制造/生产过程中如何不使碳化铬耐磨板堆焊药芯焊丝内因管制不良而造成部分线材形成中空是耐磨板堆焊焊丝生产品质的关键。
|
Category |
Trade-mark |
Specification |
Melting |
Chemical |
Application
|
Equivalent |
|
Copper 铜锌 |
L103 |
Wire & rod |
885-888 |
Cu54 Zn Rem. |
Brazing of copper, bronze and steel, subjected to low
load. |
|
|
L104 |
Foil |
890-930 |
Cu57 Mn2 |
Brazing of
carbide cutting tool. |
|
|
|
Copper
铜磷 |
L201 |
Cast rod, wire
& rod, powder |
710-800 |
P7 Cu Rem. |
Brazing of
copper and copper alloys. |
BCuP-2 |
|
L204 |
Cast rod, wire |
640-815 |
P5 Ag15 |
Brazing of copper, copper alloys, silver and molybdenum
etc. |
BCuP-5 |
|
|
L205 |
Cast rod, wire
& rod, powder |
640-800 |
P6 Ag5 |
Brazing of
copper and copper alloys. |
BCuP-3 |
|
|
L207 |
Cast rod, wire & rod |
640-770 |
P7 Ag5 |
Brazing of copper and copper alloys. |
BCuP-7 |
|
|
L209 |
Cast rod, wire |
684-710 |
P7 Ag2 |
Brazing of
copper and copper alloys. |
BCuP-6 |
|
|
Silver
银基 |
L302 |
Wire & rod |
745-775 |
Ag25 Cu40 |
Brazing of copper, copper alloys, steel and stainless
steel etc. |
|
|
L303 |
Wire & rod |
660-725 |
Ag45 Cu30 |
Brazing of copper, copper alloys, steel and stainless
steel etc. |
BAg-5 |
|
|
L303F |
Flux coated rod |
660-725 |
Ag45 Cu30 |
L303 coated
with flux, the same application as L303. |
BAg-5 |
|
|
L304 |
Foil |
690-775 |
Ag50 Cu34 |
Brazing of copper, copper alloys and steel etc. |
BAg-6 |
|
|
L308 |
Wire & rod |
779-780 |
Ag72 Cu Rem. |
Brazing of copper and nickel under vacuum or reducing
protective atmosphere. |
BAg-8 |
|
|
L312 |
Wire & rod |
595-605 |
Ag40.Cu.Zn.Cd |
Brazing of copper, copper alloys, steel and stainless
steel etc. |
|
|
|
L313 |
Wire & rod |
625-635 |
Ag50.Cu.Zn.Cd |
Brazing of copper, copper alloys, steel and stainless
steel etc. |
BAg-1a |
|
|
L321 |
Wire & rod 丝 |
615-650 |
Ag56.Cu.Zn.Sn |
Brazing of copper, copper alloys, steel and stainless
steel etc. |
BAg-7 |
|
|
L323 |
Wire & rod |
665-755 |
Ag30.Cu.Zn.Sn |
Brazing of copper, copper alloys, steel and stainless
steel etc. |
|
|
|
L325 |
Wire & rod |
645-685 |
Ag45.Cu.Zn.Sn |
Brazing of copper, copper alloys, steel and stainless
steel etc. |
BAg-36 |
|
|
L326 |
Wire & rod |
650-720 |
Ag38.Cu.Zn.Sn |
Brazing of copper, copper alloys, steel and stainless
steel etc. |
BAg-34 |
|
|
Aluminum base 铝基 |
L400 |
Cast rod, wire & rod |
577-582 |
Si11.5 |
Brazing of aluminum and aluminum alloys. |
BAlSi-4 |
|
L401 |
Cast rod |
525-535 |
Si5 Cu28 |
Brazing of aluminum and aluminum alloys. |
|
|
|
Tin lead 锡铅 |
L600 |
Wire & rod |
183-185 |
Sn60 Sb≤0.8 |
Soldering of fusible metals and heat-treated part. |
60Sn |
|
L601 |
Wire & rod |
183-227 |
Sn18 Sb2 |
Soldering of copper, copper alloys and galvanized iron
plain sheet. |
18Sn |
|
|
L602 |
Wire & rod |
183-256 |
Sn30 Sb2 |
Soldering of copper, brass, copper alloys and
galvanized iron plain sheet. |
30Sn |
|
|
L603 |
Wire & rod |
183-235 |
Sn40 Sb2 |
Soldering of copper, copper alloys, steel and zinc
parts. |
40Sn |
|
|
L604 |
Wire & rod |
183-222 |
Sn90 Sb≤0.15 |
Soldering of copper and steel for food and medicine
field. |
90Sn |
|
|
L605 |
Wire & rod |
232-240 |
Ag5 Sn95 |
Soldering of copper and steel for electrical and food
field. |
|
|
|
L608 |
Wire & rod |
295-305 |
Sn5.5 Ag2.5 |
Soldering of copper, copper alloys, steel and stainless
steel. |
|
|
|
Nickel base 镍基 |
L702 |
Powder |
970-1000 |
Cr7 B3 Si4 |
Brazing of stainless steel under vacuum or protective
atmosphere. |
BNi-2
|
