carbide EDM block
- carbide block die blank is sintered by sinter-HIP furnace
- cold isostatic pressing machine pressed carbide block
- stress released, avoid the occurrence of cracks in the WEDM and forming
process. - non-destructive ultrasonic flaw detection, without sand holes and pores.
- carbide rings and preform blanks for the progressive die are available
Die material for stamping lead frame and connector
| Grade | Co | Density g/cm3 | Hardness HRA | T.R.S N/mm3 | Application |
|---|---|---|---|---|---|
| KD10 | 10 | 14.4 | 91.5 | 4300 | Suitable for stamping of copper and aluminum sheets, the thickness of copper and aluminum less than 0.2mm. |
| KD12 | 12 | 14.3 | 90.5 | 4000 | Suitable for stamping and cutting copper, aluminum and steel sheet. |
| KD20 | 13 | 14.25 | 91 | 4100 | With good applicability,suitable for stamping of copper and aluminum sheets. |
| KD36 | 15 | 14 | 90 | 3900 | suitable for stamping of EI silicon steel sheet, steel plate cold commercial and stainless steel plate. |
Die material for stamping motor lamination
| Grade | Co | Density g/cm3 | Hardness HRA | T.R.S N/mm3 | Application |
|---|---|---|---|---|---|
| KD40A | 12 | 14.2 | 89.5 | 3300 | suitable for stamping of top and bottom die for coll rolled sheet. |
| KD45A | 15 | 14.0 | 88.0 | 3500 | suitable for stamping of upper die for silicon steel sheet and lower die for coll rolled sheet. |
| KD55 | 20 | 13.5 | 86.4 | 3400 | suitable for stamping thick plates under large impact load conditions. |
| KD42 | 15 | 13.8 | 89.5 | 4000 | suitable for stamping of upper and lower die for soft material |
| Grade | Co | Density g/cm3 | Hardness HRA | T.R.S N/mm3 | Application |
|---|---|---|---|---|---|
| YG6A | 6 | 14.95 | 92.5 | 1800 | Fine-grain size, with good wear resistance, used for processing blades, wear resistance parts etc. |
| YG8 | 8 | 14.8 | 89.5 | 2200 | High bending strength, wear resistance lower than YG6A, used for processing blades, wear resistance parts etc. |
| YG15 | 15 | 14 | 87.5 | 2800 | Used for punch dies, stamping dies and wear resistance parts. |
| YG20 | 20 | 13.5 | 85.5 | 3200 | High bending strength, used for punching dies and other stamping dies. |
| YS2T | 15 | 14.45 | 91.5 | 2350 | Fine grain, with high wear resistance and bending strength, suitable for the grinding and finishing of cast iron rolls and high nickel-chromium rolls. |
Size for carbide EDM block
| L(mm) | W(mm) | S(mm) |
|---|---|---|
| 300 | 300 | 20-40 |
| 250 | 250 | 5-50 |
| 200 | 200 | 5-45 |
| 150 | 150 | 5-60 |
| 150 | 130 | 10-45 |
| 150 | 100 | 10-45 |
| 150 | 80 | 10-45 |
| 135 | 135 | 10-70 |
| 125 | 125 | 2-45 |
| 105 | 105 | 2-70 |
| 100 | 100 | 2-70 |
| 100 | 50 | 10-50 |
| 100 | 45 | 10-50 |
Production technics
Carbide blocks are mainly made from wolfram carbide and cobalt powder using powder metallurgy methods. The main production processes of sintered tungsten carbide blocks are powder milling, ball milling, pressing, and sintering. The content of WC and Co in carbide EDM blanks is not the same for different uses.
Application
Tungsten carbide block is mainly used to fabricate progressive dies stamping metal sheets. It is also an excellent material for making wear-resistant parts, cutters， and gauge blocks.
Main Process flow
Powder milling→ formula according to application requirements → wet milling → mixing → crushing → drying → sieving → adding forming agent → redrying → sieving to obtain cemented carbide powder→ granulating → cold isostatic pressing → forming → low-pressure sintering →blanks→stress released→flaw inspection→packing→warehousing
