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Nickel-based interlayer material suitable for instantaneous liquid phase diffusion welding

An instantaneous liquid phase, diffusion welding technology, applied in welding/cutting medium/material, welding medium, welding equipment, etc., can solve the problems of accelerated base metal grains, unfavorable impact toughness at low temperature and growth of welded joints, etc. To achieve the effect of simple production, wide application and good toughness

Inactive Publication Date: 2011-02-09
BC P INC CHINA NAT PETROLEUM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The patent uses iron-based materials, and the welding temperature is high (above 1200), which will accelerate the grain growth of the base metal, which is unfavorable to the impact toughness of the welded joint, especially the low-temperature impact toughness, and the literature has not yet involved low-alloy Intermediate layer alloys for transient liquid phase diffusion welding of steel and low alloy steel / stainless steel composites

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0010] Nickel-based amorphous interlayer alloy chemical composition: Si 5%, B 3%, the rest is nickel.

[0011] Production process: Put the master alloy into a quartz test tube with a nozzle at the bottom, put the test tube on the top of the roller equipped with a vacuum cover, and backfill high-purity Ar (99.9%) to a certain pressure after vacuuming, repeat 2- After 3 times, use high-frequency heating equipment to heat the sample. After reaching a certain temperature, keep it warm for a period of time, and blow high-pressure Ar gas into the quartz test tube. The liquid alloy is quickly sprayed on the surface of the high-speed rotating copper roller, and it is quickly solidified to a thickness of about 30m. Ni-Si-B interlayer alloy foil.

[0012] Use this composition alloy to carry out instantaneous liquid phase diffusion welding on low alloy steel 16Mn. The welding temperature is 1130°C. After welding, the mechanical properties are tested. The results are: the tensile fracture...

Embodiment 2

[0014] Nickel-based amorphous interlayer alloy chemical composition: 4.3%, B 8%, the rest is nickel. The preparation method is the same as in Example 1.

[0015] Use this composition alloy to carry out instantaneous liquid phase diffusion welding of 316L stainless steel. The welding temperature is 1180 ° C. After welding, the mechanical performance test is carried out. The results are: the tensile fracture position is the heat-affected zone, the tensile strength Rm = 620MPa, and the diameter of the bending shaft is D=6t, no cracks when bent 180°.

Embodiment 3

[0017] Nickel-based amorphous interlayer alloy chemical composition: 7%, B 5%, the rest is nickel. The preparation method is the same as in Example 1.

[0018] Use this composition alloy to carry out instantaneous liquid phase diffusion welding on 16Mn / 316L composite plate. The welding temperature is 1200°C. After welding, the mechanical performance test is carried out. The results are: the tensile fracture position is the base material, the tensile strength Rm=600MPa, The diameter is D=6t, and it is bent 180° without cracks.

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Abstract

The invention discloses a nickel-based interlayer material suitable for instantaneous liquid phase diffusion welding. The material is characterized by comprising the following chemical elements in percentage by weight: 4.3 to 7 percent of Si, 3 to 8 percent B and the balance of nickel. The melting point temperature of a quickly solidified Ni-B-Si alloy foil belt with thickness of 30 microns is 950 to 1,050 DEG C; the material is suitable for instantaneous liquid phase diffusion welding among low-alloy steel, stainless steel and low-alloy steel / stainless steel composite materials, has high strength of seams and heat affected zones, good toughness and wide application, and is simple and convenient to manufacture; and the tensile strength Rm is 620MPa, the bent shaft diameter D is 6t, and no crack is produced when bending 180 degrees.

Description

technical field [0001] The invention belongs to the field of welding materials, in particular to a nickel-based amorphous interlayer alloy material suitable for instantaneous liquid phase diffusion welding. Background technique [0002] Instantaneous liquid phase diffusion welding is to use the self-melting of the intermediate layer or the eutectic reaction with the base metal to obtain a certain amount of liquid phase on the connection interface. At the same time, the liquid phase acts as a diffusion bridge to accelerate the diffusion. The melting point (Melting point depressant, referred to as MPD) element diffuses rapidly to the matrix, causing the chemical composition of the bonding interface to change significantly, resulting in re-solidification of the bonding interface at a certain temperature for a period of time, that is, "isothermal solidification". The liquid phase undergoes isothermal solidification and the solid phase components are homogenized, and finally a we...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B23K35/30C22C19/03
Inventor 宫少涛李为卫吉玲康徐锦峰仝都喜
Owner BC P INC CHINA NAT PETROLEUM CORP
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