D802钴铬钨合金焊芯的钴基堆焊焊条，采用直流反接，堆焊金属在650℃工作仍能保持良好的耐磨性和耐腐蚀性，用于要求在650℃左右工作仍能保持良好的耐磨性和耐腐蚀性的场合，或承受冲击和冷热交错的部位，如堆焊高温高压阀门及热剪切刀刃等。 D812钴基堆焊焊条
熔敷金属化学成分/%
C-0.70～1.40 Si≤2.0 Mn≤2.0 Cr-25.0～32.0 Fe≤4.0 W-3.0～6.0 其他≤4.0 Co-余量
堆焊层硬度HRC≥40
D812钴铬钨合金焊芯的钴基堆焊焊条，采用直流反接，堆焊金属在650℃工作仍能保持良好的耐磨性和耐蚀性，用于高温高压阀门、高压泵的轴套筒和内衬套筒以及化钎设备的斩刀刃口等
熔敷金属化学成分/%
C-1.00～1.70 Si≤2.00 Mn≤2.00 Cr-25.0～32.0 Fe≤5.0 W-7.0～10.0 其他≤4.0 Co-余量
堆焊层硬度HRC≥44
钴基焊条
Trade- | Equivalent to China Standard | Characteristics & application | Equivalent to AWS |
D 802 | EDCoCr-A-03 | HRc38-47. Resistance to heat, wear and corrosion. Hardfacing of high temperature part such as the edge of thermo-cutter. | ECoCr-A |
D 812 | EDCoCr-B-03 | HRc45-50. Resistance to heat, wear and corrosion. Hardfacing of high temperature part such as internal-combustion engine valve. | ECoCr-B |
D 822 | HRc≥53. Resistance to Wear and heat, bad shock resistance. Hardfacing of rotating blade wheel of boiler. | ||
D 832 | EDCoCr-C-03 | HRc≥50. Wear and heat resistance. Hardfacing of high temperature part such as hot-rolling guided way. | ECoCr-C |
D 842 | EDCoCr-D-03 | HRc28-38. Corrosion and thermo-fatigue resistance, work harding. Hardfacing of hot forging die. |
