Unlock instant, AI-driven research and patent intelligence for your innovation.

Soldering method of rotor and steel shaft of titanium-aluminum turbocharger

A technology of turbocharger and brazing method, which is applied in the direction of welding medium, welding equipment, welding/cutting medium/material, etc., can solve the difference in strength and plasticity of welding shafts at room temperature and high temperature, and affect the room temperature and temperature of welding turbine shafts. High temperature applications etc.

Inactive Publication Date: 2011-07-13
LUOYANG SUNRUI TI PRECISION CASTING
View PDF7 Cites 16 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Different solder joints produce different compounds, and different solder thicknesses, brazing temperatures, holding pressures, and time have varying degrees of influence on the microstructure of welded joints, so that the strength and plasticity of the welded shaft at room temperature and high temperature and other properties have a huge difference, which ultimately affects the room temperature and high temperature applications of welded turbine shafts

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Soldering method of rotor and steel shaft of titanium-aluminum turbocharger
  • Soldering method of rotor and steel shaft of titanium-aluminum turbocharger

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0030] Ti-46Al-4Nb-0.6Cr-0.2Ni-0.2Si(at%) titanium-aluminum material turbine shaft and 42CrMo steel shaft, using nickel-based solder including BNi73CrFeSiB(C) corresponding to American brand BNi-1, corresponding to American brand BNi -2 BNi82CrSiBFe, BNi92SiB corresponding to American brand BNi-3, BNi95SiB corresponding to American brand BNi-4, and BNi71CrSi corresponding to American brand BNi-5 for induction brazing. The induction brazing process is: 1) The thickness of the solder is 0.04mm; 2) Brazing temperature: 50°C above the liquidus temperature of the solder; 3) The brazing pressure is 5MPa; 4) The brazing time is 2 minutes; 5) Argon gas is used for inert gas shielded welding. After brazing, the tensile strength of the welded joint at room temperature and at 600 °C is shown in Table 1.

Embodiment 2

[0032] Ti-46Al-4Nb-0.6Cr-0.2Ni -0.2Si(at%) titanium-aluminum turbine shaft and 42CrMo steel shaft are induction brazed with nickel-based solder BNi73CrFeSiB(C), BNi82CrSiBFe, BNi92SiB, BNi95SiB, BNi71CrSi, The induction brazing process is: 1) The thickness of the solder is 0.02mm; 2) The brazing temperature: 80°C above the liquidus temperature of the solder; 3) The brazing pressure is 8MPa; 4) The brazing time is 5 minutes; 5) Argon gas Perform inert gas shielded welding. After brazing, the tensile strength of the welded joint at room temperature and at 600 °C is shown in Table 1.

Embodiment 3

[0034] Ti-46Al-4Nb-0.6Cr-0.2Ni-0.2Si(at%) titanium-aluminum turbine shaft and 42CrMo steel shaft are vacuum brazed with nickel-based solder BNi73CrFeSiB(C), BNi82CrSiBFe, BNi92SiB, BNi95SiB, BNi71CrSi, The vacuum brazing process is: 1) The thickness of the solder is 0.2mm; 2) The brazing temperature: 10°C above the liquidus temperature of the solder; 3) The brazing pressure is 20MPa; 4) The brazing time is 2min; 5) The vacuum degree: 1×10 -4 Pa. After brazing, the tensile strength of the welded joint at room temperature and at 600 °C is shown in Table 1.

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

PropertyMeasurementUnit
Thicknessaaaaaaaaaa
Login to View More

Abstract

The invention discloses a soldering method of a rotor and a steel shaft of a titanium-aluminum turbocharger. The rotor has the atomic composition of Ti-(46-47)Al-(3.5-4.5)Nb-(0.5-1.5)Cr-(0.2-0.6)Ni-(0.2-0.8)Si; the steel shaft is made of 42CrMo, 40Cr and 35CrMo structural steel, a soldering material is BNi73CrFeSiB(C), BNi82CrSiBFe, BNi92SiB, BNi95SiB and BNi71CrSi; the thickness of the soldering material is 0.02-0.20mm; the soldering temperature liquid is above 10-80 DEG C than a phase line; and the soldering pressure is 0.1-20MPa; and the soldering time is 30s-30min. The room temperature tensile strength Rm of a soldered joint is not less than 235MPa; and the 600-DEG C tensile strength Rm of the soldered joint is not less than 220MPa and meets the using requirement.

Description

[0001] technical field [0002] The invention relates to a welding technology, in particular to a brazing method for a titanium-aluminum turbocharger rotor and a steel shaft. Background technique [0003] With the continuous improvement of the performance of engines such as aviation, aerospace, automobiles, and ships, the performance requirements for high-temperature materials are higher, that is, higher strength, oxidation resistance, and lighter density. γ-TiAl-based alloy materials have the advantages of good high temperature strength, creep resistance and oxidation resistance, and are developing into a new generation of aero-engine materials, which can be used to manufacture compressors, gas turbine blades, compressor stator windshields, stator machines Seats and other large-scale casting and forging parts with complex shapes, partial replacement of bulky nickel-based superalloys can reduce weight by about 50%. γ-TiAl-based alloys have been used in the manufacture of tu...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
IPC IPC(8): B23K1/00B23K1/002B23K1/008B23K1/19B23K35/30B23K35/38
Inventor 周洪强陈志强姜建伟吴胜男刘国良
Owner LUOYANG SUNRUI TI PRECISION CASTING