标准：
符合GB EDCoCr-A-03
相当AWS ECoCr-A
说明：
D802是钛钙型药皮，低碳钴铬钨为焊芯的堆焊焊条。交直流两用，电弧稳定，成型美观。堆焊层在600℃以上的高温中仍能保持良好的耐蚀、耐磨性能。D802是在钴铬钨堆焊合金中，碳及钨含量较低，韧性最好的一种，能承受在冷热条件下的冲击，产生裂缝的可能性。糜仓屎辖鸬毒呷菀浊邢骷庸ぁ＝鹣嘧橹率咸搴凸簿。
D802 is a surfacing electrode with titanium calcium coating and low carbon cobalt chromium tungsten as the core. AC and DC dual purpose, stable arc, beautiful shape. The surfacing layer can still maintain good corrosion resistance and wear resistance at high temperatures above 600 ℃. D802 is the cobalt-chromium-tungsten surfacing alloy with lower carbon and tungsten content and the best toughness. It can withstand the impact under cold and hot conditions, has a small possibility of cracking, and is easy to cut with cemented carbide tools. . The metallographic structure is austenite and eutectic.
用途：
用于要求在650℃高温下工作能保持良好耐磨及耐蚀性能的场合。例如，堆焊高温高压阀门、热剪切刀刃、热锻模等冲击和加热交错的地方。
It is used in occasions that require good wear resistance and corrosion resistance when working at a high temperature of 650℃. For example, surfacing welding of high temperature and high pressure valves, hot shear blades, hot forging dies and other places where impact and heating intersect.
熔敷金属化学成分（%）
| C | Mn | Si | Cr | W | Co | Ni | Fe | 其它元素总量 |
| 0.70~1.40 | ≤2.0 | ≤2.0 | 25.0~32.0 | 3.0~6.0 | 余量 | ≤3.0 | ≤5.0 | ≤4.0 |
堆焊层常温硬度值
HRc=45~50
以上化学成分及常温硬度指堆焊三层以上堆焊金属。
The above chemical composition and normal temperature hardness refer to the surfacing welding of more than three layers of surfacing metal.
参考电流：AC或DC
| 焊条直径（mm） | 3.2 | 4.0 | 5.0 |
| 焊接电流（A） | 90~130 | 140~170 | 170~200 |
注意事项：
1. 焊前焊条须经150℃烘焙一小时。
2. 为了避免产生裂缝，根据工件大小和母材种类，须经过200~400℃的预热。并宜采用小电流短弧焊接。焊后应将工件立即放入干燥和预热的砂缸或草灰中缓冷。
3. 由于电弧焊的温度较气焊高，故稀释率也较气焊大，因此一般只在难于进行气焊或为提高焊接效率时才考虑电弧焊。
1. The electrode must be baked at 150℃ for one hour before welding.
2. In order to avoid cracks, according to the size of the workpiece and the type of base material, it must be preheated at 200~400℃. And it is advisable to use small current short arc welding. After welding, the workpiece should be placed in a dry and preheated sand jar or straw ash to cool slowly.
3. Since the temperature of arc welding is higher than that of gas welding, the dilution rate is also greater than that of gas welding. Therefore, arc welding is generally only considered when it is difficult to perform gas welding or to improve welding efficiency.
相关产品
D802 钴基1号堆焊焊条
钴基堆焊焊条的焊芯为钴铬钨即司太立合金，钛钙型药皮。此类合金具有良好的红硬性，在600℃以上仍能保持较高的硬度及良好的耐磨、耐蚀性。其中，碳高、耐磨性好，而抗冲击能力下降。堆焊焊条的堆焊效果一般与工件的预热及层间温度高低、焊接电流大小、电弧长短以及堆焊焊层的层数等有关。如堆焊层的化学成分、硬度等通常是指堆焊三层以上的堆焊金属而言。
D812 钴基2号堆焊焊条
钴基堆焊焊条的焊芯为钴铬钨即司太立合金，钛钙型药皮。此类合金具有良好的红硬性，在600℃以上仍能保持较高的硬度及良好的耐磨、耐蚀性。其中，碳高、耐磨性好，而抗冲击能力下降。堆焊焊条的堆焊效果一般与工件的预热及层间温度高低、焊接电流大小、电弧长短以及堆焊焊层的层数等有关。如堆焊层的化学成分、硬度等通常是指堆焊三层以上的堆焊金属而言。
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