纯镍铸铁焊条Z308 EZNi-1焊条 ENi-CI纯镍焊材
标准：
符合 GB EZNi-1
相当 AWS ENi-CI
说明：
Z308是纯镍焊芯，强还原性石墨型药皮的铸铁焊条，可交直流两用。施焊时电弧稳定，操作方便，焊件可不预热，其是铸铁冷焊焊条中，抗裂性、切削加工性、焊缝强度等综合性能较好的一种焊条。
Z308 is a cast iron electrode with a pure nickel core and a strong reducing graphite coating. It can be used for both AC and DC. When welding, the arc is stable, the operation is convenient, and the weldment can be preheated. It is an electrode with better comprehensive performance such as crack resistance, machinability, and weld strength among cast iron cold welding electrodes.
用途：
可用于常温或稍经预热（至200℃左右）的重要灰口铸铁，如：铸铁薄件的加工面，汽缸盖、发动机座、齿轮箱以及机床导轨、铸铁制成的机械零件等的焊、补。
It can be used for the welding of important gray cast irons at room temperature or slightly preheated (to about 200°C), such as: the machined surface of thin cast iron, cylinder heads, engine seats, gear boxes, machine tool guides, mechanical parts made of cast iron, etc. , Make up.
熔敷金属化学成分（%）
| C | Si | Mn | Fe | Ni | S |
| ≤2.0 | ≤2.5 | ≤1.0 | ≤8.0 | ≥90 | ≤0.03 |
参考电流：AC或DC
| 焊条直径（mm） | 2.5 | 3.2 | 4.0 | 5.0 |
| 焊接电流（A） | 50~80 | 80~100 | 110~140 | 150~180 |
注意事项：
1. 首先清除焊接部位的油污、砂、水、锈等污物，并视缺陷类型，开坡口、打止裂孔及熔池造型等准备措施。
2. 如填补大的空隙，应先从四周开始堆焊一层，然后向中部逐步填满。
3. 为避免母材熔化过多，减少白口层。施焊中，尽量采用小电流，短弧，窄道，短道，分散分段焊，每段焊道长度一般不超过50mm，待温度降至不烫手时再继续施焊。并且施焊后立即锤击焊缝以松驰应力防止裂纹。
4. 施焊前应将焊条在150℃左右烘焙一小时。
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.
