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A short process preparation method of gh4169 alloy welding wire

A technology of GH4169 and alloy welding wire, applied in welding equipment, metal processing equipment, manufacturing tools, etc., can solve problems such as uneven structure, low plastic toughness of welded joints, and many microscopic cracks

Active Publication Date: 2020-10-20
LANZHOU WEITE WELDING MATERIAL FURANCE BURDEN
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The invention aims at the problems that the existing GH4169 superalloy welding wire has uneven structure of the weld metal, many microscopic cracks and the plastic toughness of the welded joint is far lower than that of the base metal, and provides a kind of structure with good uniformity, anti-oxidation, anti-oxidation, Welding wire with creep resistance, corrosion resistance, excellent high temperature strength, and good welding performance

Method used

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preparation example Construction

[0029] A short-process preparation method for GH4169 alloy welding wire. The raw materials used in the manufacture of the alloy welding wire are composed of the following components by weight percentage: Ni: 50.0%-55.0%, Cr: 17.0%-21.0%, Nb: 5.00% %~5.50%, Mo: 2.80%~3.30%, Ti: 0.75%~1.15%, Al: 0.30%~0.70%, C: 0.02%~0.06%, the rest is Fe and a small amount of impurities, the preparation process is as follows figure 1 shown, including the following steps:

[0030] Step (1), batching; when batching the welding wire chemical composition range, determine the batching ratio according to the technical requirements of different weldments, that is: when batching the welding wire chemical composition interval, fine-tune the performance requirements of different weldments (±0.3- 0.5%) alloy ingredient ratio;

[0031] Step (2), smelting: use a vacuum induction electroslag remelting furnace to smelt the alloy, put Ni, Cr, Nb, Mo, C, Fe and other raw materials weighed according to the prop...

Embodiment 1

[0040] A short-process preparation method for GH4169 alloy welding wire. The raw materials used in the manufacture of the alloy welding wire are calculated by weight percentage and consist of the following components: Ni: 50.0%, Cr: 17.0%, Nb: 5.00%, Mo: 2.80% , Ti: 1.15%, Al: 0.70%, C: 0.06%, the rest is Fe and a small amount of impurities, the preparation process is as follows figure 1 shown, including the following steps:

[0041] Step (1), batching; when weighing the batching of each component, fine-tune the batching ratio of ±0.5 alloy according to the performance requirements of different weldments;

[0042] Step (2), smelting: use a vacuum induction electroslag remelting furnace to smelt the alloy, put Ni, Cr, Nb, Mo, C, Fe and other raw materials weighed according to the proportion of ingredients into the crucible, then vacuumize, and then Heat to 1320°C to melt all the raw materials, turn off the power and supply argon, then continue heating to 1320°C, then add Ti an...

Embodiment 2

[0049] A short-process preparation method for GH4169 alloy welding wire. The raw materials used in the manufacture of the alloy welding wire are calculated by weight percentage and consist of the following components: Ni: 55.0%, Cr: 21.0%, Nb: 5.50%, Mo: 3.30%, Ti: 0.75%, Al: 0.30%, C: 0.02%, the rest is Fe and a small amount of impurities, the preparation process is as follows figure 1 shown, including the following steps:

[0050] Step (1), batching; when weighing the batching of each component, fine-tune the batching ratio of ±0.3 alloy according to the performance requirements of different weldments;

[0051] Step (2), smelting: use a vacuum induction electroslag remelting furnace to smelt the alloy, put Ni, Cr, Nb, Mo, C, Fe and other raw materials weighed according to the proportion of ingredients into the crucible, then vacuumize, and then Heat to 1400°C to melt all the raw materials, turn off the power and supply argon, then continue heating to 1320°C, then add Ti and...

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Abstract

The invention relates to a GH4169 alloy welding stick short process preparing method. Chemical compositions in the method comprise, by weight, 50.0%-55.0% of Ni, 17.0-21.0% of Cr, 5.00%-5.50% of Nb, 2.80%-3.30% of Mo, 0.75%-1.15% of Ti, 0.30%-0.70% of Al, 0.02%-0.06% of C and the balance Fe. Welding stick preparing technological processes mainly include the steps of matching, smelting, ingot casting, homogenizing annealing, bar extrusion, continuous annealing, multi-pass continuous extrusion and the other processes. A prepared alloy welding stick has the excellent high-temperature strength, oxidation resistance, creep resistance and resistance to corrosion and has the good fatigue property and weldability. In particular at the high temperature being 650 DEG C, the mechanical property of the alloy welding stick has the good stability, certain working pressure can be borne under 600 DEG C-1200 DEG C, and the alloy welding stick can be widely applied to welding pieces for blades, turbinediscs, turbine discs and long-service life aerospace engines.

Description

technical field [0001] The invention belongs to the technical field of high-temperature alloy welding wire preparation engineering and relates to a high-temperature alloy welding wire, in particular to a short-process preparation method of a GH4169 alloy welding wire. Background technique [0002] GH4169 alloy is a precipitation-strengthened Ni-Cr-Fe-based superalloy, which has high yield strength, tensile strength and plasticity between -253°C and 650°C, and has good corrosion resistance, radiation resistance and Welding performance, so it is widely used in working blades, turbine disks, combustion chambers and long-life aerospace engines. In many cases, these materials need to be welded, and the welding wire used is generally similar or the same as the base metal composition. However, it is found in the actual production process that the welding wire produced by the existing process cannot meet the welding design requirements. The microstructure of the weld metal is coars...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B23K35/30B23K35/40
CPCB23K35/3033B23K35/40
Inventor 傅开武王一珠郭庭彪
Owner LANZHOU WEITE WELDING MATERIAL FURANCE BURDEN
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