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呼和浩特飛機牌L325銀焊條 現貨
二、保護焊接熔池。焊接過程中，空氣中的氧、氮及水蒸氣浸入焊縫，會給焊縫帶來不利的影響。不僅形成氣孔，而且還會降低焊縫的機械性能，甚至導致裂紋。而焊條藥皮熔化后，產生的大量氣體籠罩著電弧和熔池，會減少熔化的金屬和空氣的相互作用。焊縫冷卻時，熔化后的藥皮形成一層熔渣，覆蓋在焊縫表面，保護焊縫金屬并使之緩慢冷卻、減少產生氣孔的可能性。
| 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. | 呼和浩特飛機牌L325銀焊條 現貨 |
| L104 | Foil | 890-930 | Cu57 Mn2 | Brazing of carbide cutting tool. | ||
| 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. | 焊芯是根據國家標準“焊接用鋼絲”（GB 1300-77)的規定分類的，用于焊接的專用鋼絲可分為碳素結構鋼、合金結構鋼、不銹鋼三類。 |
| 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. | ||
| 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. | ||
| 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. | ||
| 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. | 焊條藥皮是指涂在焊芯表面的涂料層。藥皮在焊接過程中分解熔化后形成氣體和熔渣，起到機械保護、冶金處理、改善工藝性能的作用。藥皮的組成物有：礦物類（如大理石、氟石等）、鐵合金和金屬粉類（如錳鐵、鈦鐵等）、有機物類（如木粉、淀粉等）、化工產品類（如鈦白粉、水玻璃等）。焊條藥皮是決定焊縫質量的重要因素，在焊接過程中有以下幾方面的作用： | |
| Nickel base 鎳基 | L702 | Powder | 970-1000 | Cr7 B3 Si4 | Brazing of stainless steel under vacuum or protective atmosphere. | BNi-2 |
呼和浩特飛機牌L325銀焊條 現貨
以結構鋼為例：牌號,編制法。結XXX,結為結構鋼焊條,第3個數字,代表藥皮類型,焊接電流要求,第1、2數:代表焊縫金屬抗拉強度 。
