Mining machinery Open Die Forgings 18CrNiMo7-6 4340 20 CrMnMo big gear ring 1
18CrNiMo7-6 4340 20CrMnMo big gear ring 150T Open Die Forgings
1.Product:
Mining big gear,casting big gear ring,precision big gear ring,grinding big gear ring,precision casting big gear
2.Product reference:
| Material | 18CrNiMo7-6,4340,20CrMnMo |
| Equipment | 8000T open die hydropress |
| Application |
Large scale mining machinery equipment,transmission gear |
| Melting process | LF+EF+VD |
| Production process |
Forging(casting)+heat treatment+hobbing+grinding |
| Foring ratio |
≥4 |
| Applicable standard | ASTM,ASME,DIN,JIS,ISO,BS,API,EN |
| Executive standard | JB/GB/EN/DIN/JIS/ASME/ASTM/ISO |
|
Certification authority |
ISO9,TÜV,BV,LR,ABS,RINA,GL,KR,DNV,NK,PED. |
|
Delivery term |
Rough machining(N+T);finish machining(Q+T) |
|
Test equipment |
Spectrograph,UT device,tensile and impact test machine,metalloscope,outside micrometer,bore dial indicator,hardness test machine,coordinate measuring machine |
| Service | Our service included the forging, process, heat treatment, finish machining, package, local logistics, customers clearance and maritime transport. We took the customer’s requirements as the principal thing, and pay attention on the products quality. |
3.Custom properties
| Material elements | C | Si | Mn | P | S | Cr | Ni | Mo |
Other |
| 18CrNiMo7-6 | 0.15-0.21 | 0.17-0.35 | 0.50-0.90 | ≤0.025 | ≤0.025 | 1.50-1.80 | 1.40-1.70 | 0.25-0.35 | |
| 4340 | 0.38-0.43 | 0.15-0.35 | 0.60-0.80 | ≤0.035 | ≤0.040 | 0.70-0.90 | 1.65-2.00 | 0.20-0.30 | - |
| 20CrMnMO | 0.17-0.23 | 0.17-0.37 | 0.90-1.20 | 0.035 | 0.035 | 1.10-1.40 | 0.30 | 0.20-0.30 |
|
Mechanical property |
Dia.(mm) |
TS/Rm(Mpa) |
YS/Rp0.2(Mpa) |
EL/A5(%) |
RA/Z(%) |
Type Of notch |
Impact energy |
HBW |
| 18CrNiMo7-6 | Ø15 | ≥980 | ≥785 | ≥9 | ≥40 | V | ≥47 | ≤269HBS |
| 4340 | Ø15 | ≥980 | ≥835 | ≥12 | ≥55 | V | ≥78 | ≤179HBS |
| 20CrMnMo | Ø15 | ≥1180 | ≥885 | ≥10 | ≥45 | V | ≥55 | ≤217HBS |
4.Process procedure:
Forging process flow quality control: Raw material steel ingot into warehouse(test the chemical content) → Cutting→ Heating(Furnace temperture test) → Heat treatment after forging(Furnace temperture test) Discharge the furnace(blank inspection)→ Machining→ Inspection(UT,MT,Visal diamention, hardness)→ QT→ Inspection(UT, mechanical properties, hardness, grain size)→ Finish machining→ Inspection (dimension)→ Packing and Marking(steel stamp, mark)→ Storage Shipment
5.Commerce clause:
| Max weight | 150T |
| MOQ | 1PC |
| Delivery date | 30-90 Days |
| Package | wooden case,wooden pallet,iron frame |
| Delivery term | FOB;CIF;CFR；DDU； |
| Payment term | T/T,LC |
| Transportation |
By ocean,air |
6.Keywords:
Precision big gear ring after forging or casting,then processed by double column vertical miller combined machining center,later processed by CNC hobbing machine,finally CNC gear profile grinding machine to form teeth,precision big gear ring can be dismantled for transportation,easy to install for customer.
Note:
High-precision dimensional tolerance;Excellent mechanical properties;
Produce different dimension based on customer’s requirements;
Advanced manufacture equipments and inspection devices;
Excellent technical personality;Control the production procedure strictly;
Pay attention on the package protection;Quality full service.
Get in Touch
Have questions about our products or want to discuss a custom order? Our team is ready to help you.