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衡水飛機牌L321銀焊條現貨
焊條焊接時，焊芯金屬占整個焊縫金屬的一部分。所以焊芯的化學成分，直接影響焊縫的質量。因此，作為焊條芯用的鋼絲都單獨規定了它的牌號與成分。如果用于埋弧自動焊、電渣焊、氣體保護焊、氣焊等熔焊方法作填充金屬時，則稱為焊絲。
| Category | Trade-mark | Specification | Melting | Chemical | Application | Equivalent |
| Copper 銅鋅 | L103 | Wire & rod | 885-888 | Cu54 Zn Rem. | Brazing of copper, bronze and steel, subjected to low load. | 衡水飛機牌L321銀焊條現貨 |
| L104 | Foil | 890-930 | Cu57 Mn2 | Brazing of carbide cutting tool. | 6)硫（S）硫是一種有害雜質，隨著硫含量的增加，將增大焊縫的熱裂紋傾向，因此焊芯中硫的含量不得大于0. 04%。在焊接重要結構時，硫含量不得大于0. 03%。 | |
| Copper 銅磷 | 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 銀基 | 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 |
| Brazing of copper, copper alloys, steel and stainless steel etc. | 4)鉻(Cr）鉻能夠提高鋼的硬度、耐磨性和耐腐蝕性。對于低碳鋼來說，鉻便是一種偶然的雜質。鉻的主要冶金特征是易于急劇氧化，形成難熔的氧化物三氧化二鉻(Cr203)，從而增加了焊縫金屬夾雜物的可能性。三氧化二鉻過渡到熔渣后，能使熔渣粘度提高，流動性降低。 | |
| L313 | Wire & rod | 625-635 |
| Brazing of copper, copper alloys, steel and stainless steel etc. | BAg-1a | |
| L321 | Wire & rod 絲 | 615-650 |
| Brazing of copper, copper alloys, steel and stainless steel etc. | BAg-7 | |
| L323 | Wire & rod | 665-755 |
| Brazing of copper, copper alloys, steel and stainless steel etc. | (3)熔渣的比重應小于熔化金屬的比重，凝固溫度也應稍低于金屬凝固溫度，渣殼應易脫掉； | |
| L325 | Wire & rod | 645-685 |
| Brazing of copper, copper alloys, steel and stainless steel etc. | BAg-36 | |
| L326 | Wire & rod | 650-720 |
| Brazing of copper, copper alloys, steel and stainless steel etc. | BAg-34 | |
| Aluminum base 鋁基 | 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. | 六、藥皮在焊接過程中起著極為重要的作用。若采用無藥皮的光焊條焊接，則在焊接過程中，空氣中的氧和氮會大量侵入熔化金屬，將金屬鐵和有益元素碳、硅、錳等氧化和氮化形成各種氧化物和氮化物，并殘留在焊縫中，造成焊縫夾渣或裂紋。而熔入熔池中的氣體可能使焊縫產生大量氣孔，這些因素都能使焊縫的機械性能（強度、沖擊值等）大大降低，同時使焊縫變脆。此外采用光焊條焊接，電弧很不穩定，飛濺嚴重，焊縫成形很差。 | |
| Tin lead 錫鉛 | 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 鎳基 | L702 | Powder | 970-1000 | Cr7 B3 Si4 | Brazing of stainless steel under vacuum or protective atmosphere. | BNi-2 |
衡水飛機牌L321銀焊條現貨
七、焊條藥皮類型及主要特點。按照藥皮的主要成分可以確定焊條的藥皮類型。由于藥皮配方組成不同，致使各種藥皮類型焊條的熔渣特性、焊接工藝性能以及焊縫金屬力學性能有很大差別。即使是同一類型藥皮，但不同牌號的焊條也因為藥皮成分和配比不同，焊條的工藝性能等也會出現明顯的差別。
