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S112 鈷基1號堆焊焊絲
標準:
相當AWS RCoCr-A
說(shuō)明:
S111是連鑄的低碳鈷鉻鎢(司太立)合金堆焊焊絲,是鈷鉻鎢堆焊合金中碳及鎢含量最低,韌性最好的一種。因此能夠承受在冷熱條件下的沖擊,而且產(chǎn)生裂紋的可能性也小。堆焊層具有良好的耐蝕、耐熱、耐磨性能,在650℃左右的高溫下,亦能保持這些特性。用硬質(zhì)合金刀具易進(jìn)行切削加工,金相組織為含鎢、鉻的鈷基固溶體(奧氏體)和固溶體與鉻鎢復合碳化物共晶。
S111 is a continuous cast low-carbon cobalt-chromium-tungsten (Stellite) alloy surfacing wire, which has the lowest carbon and tungsten content and the best toughness in the cobalt-chromium-tungsten surfacing alloy. Therefore, it can withstand the impact under cold and hot conditions, and the possibility of cracks is also small. The surfacing layer has good corrosion resistance, heat resistance, and wear resistance, and can maintain these characteristics at a high temperature of about 650°C. It is easy to perform cutting with cemented carbide tools. The metallographic structure is cobalt-based solid solution (austenite) containing tungsten and chromium and eutectic of solid solution and chromium-tungsten composite carbide.
用途:
要求在高溫工作時(shí)能保持良好的耐磨性及耐腐蝕性,例如堆焊高溫高壓閥門(mén)、熱剪切刀刃、熱鍛模等沖擊和加熱交錯地方,可具有良好的性能。
It is required to maintain good wear resistance and corrosion resistance when working at high temperatures. For example, surfacing high temperature and high pressure valves, hot shear blades, hot forging dies and other impact and heating interlaced places can have good performance.
焊絲化學(xué)成分:
C | Mn | Si | Cr | W | Ni | Fe | Co |
0.9~1.4 | ≤1.0 | 0.4~2,0 | 26.0~32.0 | 3.0~6.0 | ≤3.0 | ≤3.0 | 余量 |
堆焊金屬常溫硬度:
HRC=45~50
以上化學(xué)成分及常溫硬度指堆焊二層以上的堆焊金屬。
The above chemical composition and normal temperature hardness refer to the surfacing metal of more than two layers.
供應規格(mm):
焊絲直徑Φ | 3.2 | 4.0 | 5.0 | 6.0 |
焊絲長(cháng)度 | 350;1000 |
注意事項:
1. 用氧-乙炔碳化焰進(jìn)行堆焊,焰心與內焰的長(cháng)度比應保持為1:3。
2. 焊接面的邊角部分一定要加工成圓角。并在清除母材表面的氧化物及油等污物后進(jìn)行堆焊。
3. 應當根據母材的種類(lèi)和工件大小,選擇適當的預熱溫度進(jìn)行預熱。
4. 堆焊時(shí),母材只須加熱到呈“出汗”(潤濕)狀態(tài),便可加入焊絲熔滴,而母材不應熔化。每堆焊一層可用碳化焰在焊層表面進(jìn)行重熔,檢查有無(wú)氣孔,凹陷或堆焊不足等缺陷,一經(jīng)發(fā)現,即加以焊補。
5. 堆焊后的工件必須立即放入干燥及預熱的沙缸或草灰中,使其緩冷,以避免裂縫。
6. 堆焊層須先經(jīng)粗磨,如發(fā)現有缺陷時(shí),應將工件重新預熱,仍按上述步驟進(jìn)行補焊。
1. Use oxygen-acetylene carbonization flame for surfacing welding, and the ratio of the length of the flame core to the inner flame should be kept at 1:3.
2. The corners of the welding surface must be processed into rounded corners. And after removing the oxide and oil on the surface of the base material, surfacing welding is carried out.
3. The appropriate preheating temperature should be selected for preheating according to the type of base material and the size of the workpiece.
4. During surfacing welding, the base metal only needs to be heated to a "sweat" (wet) state, and then welding wire droplets can be added, and the base metal should not be melted. Each layer of surfacing can be remelted with a carbonized flame on the surface of the welding layer. Check for pores, dents or insufficient surfacing. Once found, weld repairs.
5. After surfacing, the workpiece must be immediately put into a dry and preheated sand tank or straw ash, so that it can be slowly cooled to avoid cracks.
6. The surfacing layer must be rough ground first. If any defects are found, the workpiece should be preheated again, and the repair welding should still be carried out according to the above steps.
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