D317模具堆焊焊條  模具焊條  符合 GB EDRCrMoWV-A3-15                                                  說明: D317是低氫鈉型藥皮的CrWVMo沖模堆焊焊條，采用直流反接。                                   用途: 適用于冷沖模堆焊，也可進行一般切削刀具的堆焊。                                        熔敷金屬化學成分(%)                                                                       化學成分 C S P Mo Cr V W 其它元素總量                                                                   保證值 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              堆焊層硬度: （焊后空冷）HRC≥50                                                             參考電流 (DC+)                                                                                焊條直徑(mm) φ3.2 φ4.0 φ5.0                                                              焊接電流(A) 90~120 160~190 190~230                                                          注意事項:                                                                                  1.焊前焊條須經300-350℃烘焙1h。                                                                2.焊前需將工件預熱至300℃以上，以免開裂。