GH4169 filter standard and characteristics introduction

GH4169 filter is also known as GH4169 wire mesh, GH4169 screen, GH4169 woven mesh, GH4169 square hole mesh, GH4169 metal wire mesh, GH4169 filter, GH4169 square hole mesh, etc.
GH4169 alloy is a body-centered tetragonal γ face-centered cubic γ phase precipitation-strengthened nickel-based high-temperature alloy. It has good comprehensive properties in the temperature range of -253-700℃, and its yield strength below 650℃ ranks first among deformed high-temperature alloys. It has good fatigue resistance, radiation resistance, oxidation resistance, corrosion resistance, as well as good processing performance, welding performance and long-term structural stability. Various parts with complex shapes can be manufactured. In aerospace, nuclear energy, and petroleum industries, it has been widely used in the above temperature range.
Another feature of the alloy is that the structure of the alloy is particularly sensitive to the hot working process. The relationship between the phase precipitation and dissolution law in the alloy and the relationship between the structure and the process and performance can be mastered, and it can be reasonably feasible for different use requirements, and various parts that meet different strength grades and use requirements can be obtained with the required process specifications. The supply varieties include forgings, forged bars, rolled bars, cold drawn bars, round cakes, rings, plates, strips, wires, tubes, etc. It can be made into discs, rings, blades, shafts, fasteners and elastic elements, sheet structural parts, receivers and other parts that are used in aviation for a long time.
GH416 technical standards
GJB 2612-1996 "Specifications for high temperature alloy cold drawn wire for welding"
HB 6702-1993 "WZ8 series GH4169 alloy bars"
Q/6S 1034-1992 "GH4169 alloy bars for high temperature fastening of parts"
Q/3B 548-1996 "GH4169 alloy forgings
" Q/3B 4048-1993 "YZGH4169 alloy bars"
Q/3B 4050-1993 "GH4169 alloy plates"
Q/3B 4051-1993 "GH4169 alloy wires"
Q/3B 4052-1993 "GH4169 alloy capillary materials"
Q/3B 4053-1993 "GH4169 alloy ring forgings"
Q/3B 4054-1993 "ZSGH4169 alloy compressor disk and turbine disk forgings"
Q/3B 4056-1993 "GQGH4169 alloy compressor disk forgings"
Q/3B 4058-1993 "GQGH4169 alloy ring forgings"
\ nQ/3B 4156-1993 "GH4169 alloy strip"
Q/3B 4195-1993 "GH4269 alloy cold drawn rod"
Q/3B 4207-1994 "GH4169 alloy forging bar"
Q/5B 4009-1992 "GQGH4169 alloy forging technical specifications"
Q/5B 4025-1992 "GH4169 alloy forging technical conditions"
Q/5B 4036-1992 "GH4169 alloy hot rolled bars"
Q/5B 4037-1992 "GH4169 alloy thick plates, sheets and strips"
\ nQ/5B 4040-1992 "YZGH4169 alloy forging technical conditions"
Q/5B 4063-1992 "YZGH 4169 alloy rods"
Q/5B 4093-1995 "GH 4169 alloy wire"
Q/ 5B 4094-1995 "GH4169 alloy capillary materials"
Q/5B 4106-1995 "HGH4169 high temperature alloy cold drawn welding wire"
C3S 213-1988 "GH169 alloy cold rolled sheet technical conditions"
Q/16 GJXO -270-1993 "GH4169 alloy round cake and ring blank technical conditions"
RJT0-10-1992《ZSGH4169 alloy forgings》

GH4169 heat treatment: GH4169 alloy has different heat treatment systems to control the grain size, the morphology, distribution and quantity of the δ phase, so as to obtain different degrees of mechanical properties. The heat treatment system of the alloy is divided into 3 categories:
(1) (1010-1065)℃±10℃, 1h, oil cooling, air cooling or water cooling +720℃±5℃, 8h, cooling to 50℃/h furnace 620℃±5℃, 8h, air cooling. The
grains of the materials treated by this system are coarsened, there is no δ phase at the grain boundary and in the grain, there is notch sensitivity, but it is beneficial to improve the impact performance and resistance to low-temperature hydrogen embrittlement.
(2) (950-980)℃±10℃, 1h, oil cooling, air cooling or water cooling +720℃±5℃, 8h, 50℃/h cooling to 620℃±5℃, 8h, air cooling. The
grain boundaries of the materials processed by this system have δ phase, which is beneficial to eliminate the sensitivity of gaps. It is the most commonly used heat treatment system, also known as the standard heat treatment system.
(3) 720℃±5℃, 8h, cooling to 50℃/h furnace 620℃±5℃, 8h, air cooling.
After processing according to this system, the δ phase in the material is less, which can improve the strength and impact performance of the material. This system is also called direct aging heat treatment system.

GH4169 smelting and casting process
The smelting process of the alloy is divided into 3 categories: vacuum induction plus electroslag remelting; vacuum induction plus vacuum arc remelting; vacuum induction plus electroslag remelting plus vacuum arc remelting melt. The required smelting process can be selected according to the use requirements of the parts to meet the use requirements.
Application overview and special requirements of GH4169: Manufacture of various stationary and rotating parts in aerospace engines, such as disks, rings, casings, shafts, blades, fasteners, elastic elements, airways, seals, etc., as well as welded structural parts; Manufacture of various elastic components and grids for the nuclear energy industry; Manufacture of parts and other parts for the petroleum and chemical industries.
GH4169 density: density ρ=8.24g/cm³
GH4169 Formability: Due to the high niobium content in GH4169 alloy, the degree of niobium segregation in the alloy is directly related to the metallurgical process. The melting speed of electroslag remelting and vacuum arc melting and the quality of the electrode rod directly affect the quality of the material. Fast melting speed is easy to form niobium-rich black spots; slow melting speed will form niobium-poor white spots; poor surface quality of the electrode rod and cracks in the electrode rod are easy to cause the formation of white spots. Therefore, improving the quality and quality of the electrode rod. Controlling the melting speed and increasing the solidification speed of the ingot are key factors in the smelting process. In order to avoid excessive segregation of elements in the ingot, the diameter of the ingot currently used is not more than 508mm.
The homogenization process must ensure that the L phase in the ingot is completely dissolved. The time for the secondary homogenization of the ingot and the secondary homogenization of the intermediate billet depends on the diameter of the ingot and the intermediate billet. The control of the homogenization process is directly related to the degree of niobium segregation in the material.

The homogenization process of 1160℃, 20h+1180℃, 44h currently used in production is not enough to eliminate the center segregation of the steel ingot. The following homogenization process is recommended:
(1) 1150-1160℃, 20-30h+1180-1190℃, 110-130h;
(2) 1160℃, 24h+1200℃, 70h.

GH4169 cutting and grinding performance: The alloy can be cut satisfactorily. During the processing, it is necessary to ensure that the circle meets the design requirements and the transition is smooth. Sharp corners, pits and scratches are not allowed during processing, assembly or transportation, because these defects will form excessive stress concentration. Serious accidents will occur.
Application areas: Manufacturing various stationary and rotating parts in aviation and aerospace engines, such as disks, rings, casings, shafts, blades, fasteners, elastic elements, gas ducts, sealing elements, etc. and welded structural parts; manufacturing various elastic elements and grids for nuclear energy industry applications; manufacturing parts and other parts for use in the petroleum and chemical industries.