OSD Technical advantages: 1. Advanced Nitriding Technology 2.Anti-corrosion and Wear-resisting Duplex Metal Spraying Technology 3. we uses special alloy powders being sprayed and welded on the screw's ridge, and uses different alloy and welding methods for the screw of different functions. 4. Fast and on time delivery. Techological Process: Blanking → Rough Machining → Quenching & Tempering →Semi Finishing Machining → Finished Product→ Detecting → Nitriding /Alloy Processed →Finish Machining Remark: * Screw structure, compression ratio and material can be changed according to different products and output * Technological Process can be chose, according to your requirements * Various high quality alloy steels, According to different usage, the choice for alloy is different, some require for abrasion-resistant while some require for corrosion-resistant. For standard, we have Fe-based, Ni-based, W2C alloy, Tungsten alloy etc for choice. * We are able to take mapping, design for client…