Z408 鎳鐵鑄鐵焊條
焊補鑄鐵用的鎳基鑄鐵焊條在鑄鐵焊接中屬于異質(zhì)焊縫的冷態(tài)焊焊條。藥皮為強還原性石墨型,交直流兩用,工藝性能良好,可全位置焊接。焊縫金屬不存在硬而脆的CFe3(滲碳體)即白口組織,所以焊縫金屬具有良好的加工性和承受塑性變形的能力。但熔合區(qū)由于母材成分熔化的影響,仍不可避免地會有不同程度的白口組織。為了減輕熔合區(qū)硬脆組織對焊后加工性能的不良影響,使其白口層盡量較少,較薄、且不連續(xù),施焊時應(yīng)該嚴(yán)格遵循冷焊工藝規(guī)定操作。另外,某些鑄件(如長期在高溫、水蒸氣中工作的爐柵,鍋爐等),因其中的碳已被燒損,鑄件具有多空性,變得十分松脆而無法焊、補。
所屬分類: 鎳基鑄鐵焊條
產(chǎn)品詳情
標(biāo)準(zhǔn):
符合GB EZNiFe-1
相當(dāng)AWS ENiFe-C1
說明:
Z408是鎳鐵合金焊芯,強還原性石墨型藥皮的鑄鐵焊條,可交直流兩用。施焊時電弧穩(wěn)定,操作方便,其焊縫金屬的特點是顏色與母材最接近,強度高,塑性好,線膨脹系數(shù)低,抗裂性對灰口鑄鐵與Z308差不多,但對球墨鑄鐵則比Z308強,對含磷量較高(0.2%P)的鑄鐵,也有良好的效果。焊縫金屬比Z308和Z508稍硬。
Z408 is a cast iron electrode with a nickel-iron alloy core and a strong reducing graphite coating. It can be used for both AC and DC. The arc is stable during welding, and the operation is convenient. The weld metal is characterized by its color closest to the base metal, high strength, good plasticity, low linear expansion coefficient, and crack resistance similar to Z308 for gray cast iron, but for ductile iron. Stronger than Z308, it also has a good effect on cast iron with higher phosphorus content (0.2%P). The weld metal is slightly harder than Z308 and Z508.
用途:
可用于常溫或稍經(jīng)預(yù)熱(至200℃左右)的灰口鑄鐵及球墨鑄鐵的焊、補,如汽缸、發(fā)動機座、齒輪等。
It can be used for welding and repairing gray cast iron and ductile iron at room temperature or slightly preheated (to about 200°C), such as cylinders, engine seats, gears, etc.
熔敷金屬化學(xué)成分(%)
C | Si | Mn | Ni | Fe | S |
≤2.0 | ≤2.50 | ≤1.80 | 45.0~60.0 | 余量 | ≤0.025 |
參考電流:AC或DC
焊條直徑(mm) | 2.5 | 3.2 | 4.0 | 5.0 |
焊接電流(A) | 50~80 | 80~100 | 110~140 | 150~180 |
注意事項:
1. 首先清除焊接部位的油污、砂、水、銹等污物,并視缺陷類型,開坡口、打止裂孔及熔池造型等準(zhǔn)備措施。
2. 如填補大的空隙,應(yīng)先從四周開始堆焊一層,然后向中部逐步填滿。
3. 為避免母材熔化過多,減少白口層。施焊中,盡量采用小電流,短弧,窄道,短道,分散分段焊,每段焊道長度一般不超過50mm,待溫度降至不燙手時再繼續(xù)施焊。并且施焊后立即錘擊焊縫以松馳應(yīng)力防止裂紋。
4. 施焊前應(yīng)將焊條在150℃左右烘焙一小時。
1. First, remove oil, sand, water, rust and other contaminants from the welding part, and prepare measures such as beveling, cracking prevention, and molten pool modeling depending on the type of defect.
2. To fill a large gap, start from the surrounding area by surfacing one layer, and then gradually fill it up to the middle.
3. In order to avoid excessive melting of the base material, reduce the white mouth layer. In welding, try to use small current, short arc, narrow track, short track, dispersed segment welding, the length of each segment of the weld generally does not exceed 50mm, and continue welding when the temperature drops to not hot. And immediately after welding, hammer the weld to relax the stress and prevent cracks.
4. The welding rod should be baked at about 150℃ for one hour before welding.
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銅及銅合金焊絲常用于焊接銅及銅合金,其中黃銅焊絲也廣泛用于釬焊碳鋼、鑄鐵及硬質(zhì)合金刀具等。選用適當(dāng)?shù)暮附z進行氬弧焊是保證銅及青銅焊接質(zhì)量的有效方法之一,不但可獲得性能良好的焊縫而且有利于減少焊件變形。用氧-乙炔氣焊時應(yīng)配合銅氣焊熔劑使用,或使用已包有銅氣焊熔劑的銅焊絲。碳弧焊也是焊接銅及銅合金的常用方法之一,碳弧焊的焊接工藝和氣焊類似,焊絲及熔劑也和氣焊時一樣。
銅及銅合金焊絲常用于焊接銅及銅合金,其中黃銅焊絲也廣泛用于釬焊碳鋼、鑄鐵及硬質(zhì)合金刀具等。選用適當(dāng)?shù)暮附z進行氬弧焊是保證銅及青銅焊接質(zhì)量的有效方法之一,不但可獲得性能良好的焊縫而且有利于減少焊件變形。用氧-乙炔氣焊時應(yīng)配合銅氣焊熔劑使用,或使用已包有銅氣焊熔劑的銅焊絲。碳弧焊也是焊接銅及銅合金的常用方法之一,碳弧焊的焊接工藝和氣焊類似,焊絲及熔劑也和氣焊時一樣。
銅及銅合金焊絲常用于焊接銅及銅合金,其中黃銅焊絲也廣泛用于釬焊碳鋼、鑄鐵及硬質(zhì)合金刀具等。選用適當(dāng)?shù)暮附z進行氬弧焊是保證銅及青銅焊接質(zhì)量的有效方法之一,不但可獲得性能良好的焊縫而且有利于減少焊件變形。用氧-乙炔氣焊時應(yīng)配合銅氣焊熔劑使用,或使用已包有銅氣焊熔劑的銅焊絲。碳弧焊也是焊接銅及銅合金的常用方法之一,碳弧焊的焊接工藝和氣焊類似,焊絲及熔劑也和氣焊時一樣。