Forming and sintering process of PANACEA material

Abstract

The invention relates to a forming and sintering process of a PANACEA material. The forming and sintering process of the PANACEA material is characterized in that walking beam type sintering equipment is adopted for machining; the interior of the walking beam type sintering equipment comprises a degreasing section, a sintering section and a cooling section; the N2 flow in a furnace is kept to be 28 to 32 Nm < 3 > / h; the furnace pressure is kept to be 12 to 20 mbar; the period of a walking beam is kept to be 112 to 150 s; the conveying rate of a feed is controlled by the walking beam; the powder feed is firstly conveyed from a feeding section to the degreasing section by a conveying mesh belt to remove a residual binder; the feed subjected to catalytic degreasing is conveyed into the sintering section through the conveying mesh belt; the sintering section comprises five high-temperature areas: the temperature of the first high-temperature area is 1000 to 1050 DEG C, the temperature of the second high-temperature area is 1100 to 1150 DEG C, the temperature of the third high-temperature area is 1290 to 1300 DEG C, the temperature of the fourth high-temperature area is 1290 to 1300 DEG C, and the temperature of the fifth high-temperature area is 1150 DEG C; and finally the feed enters the cooling section, and is discharged out of a furnace after being cooled in the furnace so as to be turned into metal powder. According to the forming and sintering process of the PANACEA material provided by the invention, the occurrence of the phenomenon that high-temperature ferrite is generated due to overlong heat preservation time is avoided while densification is completed, and the size, the density and the magnetic conductivity of a product are facilitated.

Description

technical field [0001] The invention relates to the field of forming of metal parts, in particular to a forming and sintering process of PANACEA material. Background technique [0002] As more and more consumers pay attention to skin health, the Ni element in the metal will cause skin allergies when it is worn close to the skin, so PANACEA material was born. The Ni element is removed from the PANACEA material, but the sintered state needs to be Austenitic. Body stainless steel, so the doping of Mn and N in the original matrix acts as Ni to promote the austenitization of sintering. [0003] The sintered state of PANACEA material has high requirements on magnetic permeability, carbon content and nitrogen content, and the metallographic structure needs to be austenite, so it puts forward very high requirements on the sintering process. Previously, there were various problems in sintering in a graphite vacuum furnace. Due to insufficient nitriding, the thick part of the product...

AI Technical Summary

Problems solved by technology

After strengthening nitriding to promote austenitization, due to excessive nitriding, the nitride causes lattice expansion, and the size is always too large

And because it is a graphite furnace, the free carbon in the furnace cavity adheres to the surface of the material, causing the surface of the material to become gray.

Images