D317模具堆焊焊条 模具焊条

D317模具堆焊焊条  模具焊条  符合 GB EDRCrMoWV-A3-15                                                  说明: D317是低氢钠型药皮的CrWVMo冲模堆焊焊条，采用直流反接。                                   用途: 适用于冷冲模堆焊，也可进行一般切削刀具的堆焊。                                        熔敷金属化学成分(%)                                                                       化学成分 C S P Mo Cr V W 其它元素总量                                                                   保证值 0.70~1.00 ≤0.035 ≤0.040 3.00~5.00 3.00~4.00 1.50~3.00 4.50~6.00 ≤1.50              堆焊层硬度: （焊后空冷）HRC≥50                                                             参考电流 (DC+)                                                                                焊条直径(mm) φ3.2 φ4.0 φ5.0                                                              焊接电流(A) 90~120 160~190 190~230                                                          注意事项:                                                                                  1.焊前焊条须经300-350℃烘焙1h。                                                                2.焊前需将工件预热至300℃以上，以免开裂。