50/33   60/33  75/33 90/33 120/33  50/38 60/38  75/38 90/38 120/38 and other high speed screw barrel

RAW MATERIAL AND HARDENING REQUIREMENTS

Material：

38CrMoAIA (1.8509)，42CrMo，41CrAlMo7；Stainless steel 316，316L，316Ti，9Cr18Mo,9Cr18MoV ,Hastelloy C276,C4, M2,SKD61, (H13) SKD11 (D2),K110, Inconel 625

Heat treatment method: Nitriding treatment,Surface hardness: HV≥900[HRC≥68].Nitriding depth: 0.6-0.8mm.

Surface coating treatment, Depth: 0.02-0.15mm.

High-frequency quenching treatment, overall hardening.Hardness(HRC): 55-65

Bimetallic screw and barrel series: Iron-based alloy(HT2TJ). Hardness(HRC) : 58-60 Nickel base alloy(HT6NJ).Hardness(HRC):53-56 lron-based alloy with tungsten, carbide(HT3W). Hardness(HRC):58-60 Nickel base alloy with tungsten carbide(HT5JW).Hardness(HRC):55-58 Superhard alloy(HT9TT).Hardness(HRC):62-65

PROCESSING

Nitride screw processing：Book material → Heat treatment(quenching and tempering) → Rough machining → Heat treatment(setting) → Finishing machining → Rough milling → Heat treatment(Nitride hardening) → Finishing milling → Inspection → Delivery.

Bimetallic screw processing：Book material → Heat treatment (quenching and tempering) → Rough machining → Heat treatment(setting) → Finishing machining → Flight spray and melt bimetallic alloy → Rough milling → Inspection → Heat treatment(Nitride hardening) → Finishing milling → Inspection → Delivery

Nitride barrel processing：Book material → Rough machining (inner diameter) → Heat treatment(quenching and tempering) → Finishing machining → Rough miling → Heat treatment (Nitride hardening) → Finishing milling → Inspection → Delivery.

Bimetallic barrel processing：Book material → Rough machining(inner diameter) → Bimetallic alloy casting(inner diameter) → Finishing machining → Finishing milling → Inspection → Delivery.

50/33   60/33  75/33 90/33 120/33  50/38 60/38  75/38 90/38 120/38 and other high speed screw barrel