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Welding material special for GH4169 high-temperature alloy pipe material

A technology of GH4169 and superalloy, which is applied in the field of special welding material for GH4169 superalloy pipe and special welded pipe for GH4169 superalloy pipe, which can solve the problem that the performance of welded joint cannot meet the requirements of design indicators.

Inactive Publication Date: 2009-07-22
INST OF METAL RESEARCH - CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] GH4169 superalloy pipes require pipe-to-pipe welding in many cases, and no matching special welding materials have been developed. In the actual production process, it was found that the performance of welded joints could not meet the design index requirements, especially the δ5% was far lower than Performance index value of pipe base material

Method used

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  • Welding material special for GH4169 high-temperature alloy pipe material
  • Welding material special for GH4169 high-temperature alloy pipe material
  • Welding material special for GH4169 high-temperature alloy pipe material

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0046] The composition of GH4169 special welding consumables for superalloy pipes is: molybdenum Mo: 3.10, aluminum Al: 0.53, titanium Ti: 1.15, niobium Nb: 5.02, silicon Si: 0.0045, sulfur S: 0.0012, phosphorus P: 0.0035, manganese 0.38, carbon 0.011, boron B 0.0014, cobalt Co 0.0003, nickel Ni 52.8, iron Fe surplus.

[0047] The smelted ingots are hot-processed, cold-rolled to finished pipes and welded after annealing, and the mechanical properties and hardness of the welded joints at room temperature are tested, as shown in Table 2:

Embodiment 2

[0049] The composition of GH4169 welding wire is, molybdenum Mo: 3.12, aluminum Al: 0.57, titanium Ti: 1.19, niobium Nb: 5.52, silicon Si: 0.0041, sulfur S: 0.0010, phosphorus P: 0.0035, manganese 0.40, carbon 0.021, boron B 0.0015 , cobalt Co 0.0005, nickel Ni 52.3, iron Fe more than.

[0050]The smelted ingots are hot-processed, cold-rolled to finished pipes and welded after annealing, and the mechanical properties and hardness of the welded joints at room temperature are tested, as shown in Table 2:

[0051] Table 2 Welding joint properties of GH4169 superalloy pipe special welding consumables

[0052]

Embodiment 3

[0054] The composition of GH4169 welding wire is molybdenum Mo: 3.18, aluminum Al: 0.51, titanium Ti: 1.09, niobium Nb: 5.60, silicon Si: 0.0044, sulfur S: 0.0011, phosphorus P: 0.0037, manganese 0.45, carbon 0.021, boron B 0.0014 , cobalt Co 0.0003, nickel Ni 52.7, iron Fe more than.

[0055] The smelted ingots are hot-processed, cold-rolled to finished pipes and welded after annealing, and the mechanical properties and hardness of the welded joints at room temperature are tested, as shown in Table 3:

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Abstract

The invention relates to a welding material special for GH4169 high-temperature alloy tubular products, which is characterized in that the welding material special for the GH4169 high-temperature alloy tubular products comprises the following chemical compositions in percentage by weight: 3.0 to 3.31 percent of molybdenum, 0.45 to 0.65 percent of aluminum, 0.8 to 1.2 percent of titanium, 5.0 to 5.7 percent of niobium, 0.35 to 0.65 percent of magnesium, 0.02 to 0.03 percent of copper, 50 to 55 percent of nickel, and the balance being iron and impurities. The welding material special for the GH4169 high-temperature alloy tubular products can make welded joints have an elongation percentage of more than or equal to 18 percent when simultaneously guaranteeing the strength and the hardness of the welded joints after the welded joints after welding are subjected to solution heat treatment and aging heat treatment.

Description

technical field [0001] The invention relates to the preparation technology of high-temperature alloy high-temperature welding consumables, in particular provides a special welding consumable for GH4169 high-temperature alloy pipes, and specifically provides a special welded pipe for GH4169 high-temperature alloy pipes. Background technique [0002] GH4169 superalloy pipes require pipe-to-pipe welding in many cases, and no matching special welding materials have been developed. In the actual production process, it was found that the performance of welded joints could not meet the design index requirements, especially the δ5% was far lower than The performance index value of the pipe base material. Therefore, it is particularly urgent and necessary to develop a special welding material for GH4169 superalloy, that is, a special pipe weldment with good welding performance. The present invention starts from the study of the fundamental factors that affect the performance of weld...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B23K35/30C22F1/10
Inventor 都祥元孔凡亚李惠娟苏国跃
Owner INST OF METAL RESEARCH - CHINESE ACAD OF SCI
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