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Low-phosphorus and low-sulfur high-strength heat-resistant Cr35Ni45 nichrome welding wire and preparation technology thereof

A nickel-chromium alloy and preparation technology, which is applied in the direction of manufacturing tools, welding equipment, metal processing equipment, etc., can solve problems such as poor welding technology, low welding quality, and complicated production process, so as to improve oxidation resistance and improve The effect of welding quality and low production cost

Inactive Publication Date: 2017-09-08
JIANGSU YULI NEW MATERIAL TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the production process of these pad wire materials is more complicated, the investment is more, the overall cost is high, and there are problems such as low strength, high temperature and low plasticity, poor high temperature resistance, poor welding process, and low welding quality.

Method used

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  • Low-phosphorus and low-sulfur high-strength heat-resistant Cr35Ni45 nichrome welding wire and preparation technology thereof

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0033] A low-phosphorus-sulfur high-strength high-temperature-resistant Cr 35Ni 45 Nickel-chromium alloy welding wire, its chemical composition includes the following components in terms of mass percentage: C0.35, Si 1.2%, Cr 33.00%, Mn 0.50%, Ni 42.00%, Nb 0.30%, Ti0.30%, P0.012 %, S0.007%, Al0.25%, Fe 22.08%, and other unavoidable impurity elements.

[0034] The preparation technology of this nickel-chromium alloy welding wire comprises the following steps:

[0035] (1) Vacuum melting: according to the mass percentage of the chemical composition of the welding wire, Ni, Cr, Fe, Mn, Nb are first added to the intermediate frequency furnace for melting, and after the required chemical composition is detected, the medium and high temperature calcium-added aluminum alloy is used Deoxidize and reduce the content of phosphorus and sulfur, then add Ti to achieve the required chemical composition after detection, use the downcasting method to purify the impurities in the material, ...

Embodiment 2

[0043] A low-phosphorus-sulfur high-strength high-temperature-resistant Cr 35 Ni 45 Nickel-chromium alloy welding wire, its chemical composition includes the following components in terms of mass percentage: C0.40, Si1.40%, Cr 34.00%, Mn 0.65%, Ni 43.50%, Nb 0.45%, Ti0.45%, P0. 013%, S0.008%, Al0.28%, Fe 18.85%, and other unavoidable impurity elements.

[0044] The preparation technology of this nickel-chromium alloy welding wire comprises the following steps:

[0045] (1) Vacuum melting: according to the mass percentage of the chemical composition of the welding wire, Ni, Cr, Fe, Mn, Nb are first added to the intermediate frequency furnace for melting, and after the required chemical composition is detected, the medium and high temperature calcium-added aluminum alloy is used Deoxidize and reduce the content of phosphorus and sulfur, then add Ti to achieve the required chemical composition after detection, use the downcasting method to purify the impurities in the material,...

Embodiment 3

[0053] A low-phosphorus-sulfur high-strength high-temperature-resistant Cr 35 Ni 45 Nickel-chromium alloy welding wire, its chemical composition includes the following components in terms of mass percentage: C0.45, Si 1.60%, Cr 35.00%, Mn0.80%, Ni 45.00%, Nb 0.60%, Ti0.60%, P0. 014%, S0.009%, Al0.30%, Fe 15.63%, and other unavoidable impurity elements.

[0054] The preparation technology of this nickel alloy welding wire comprises the following steps:

[0055] (1) Vacuum melting: according to the mass percentage of the chemical composition of the welding wire, Ni, Cr, Fe, Mn, Nb are first added to the intermediate frequency furnace for melting, and after the required chemical composition is detected, the medium and high temperature calcium-added aluminum alloy is used Deoxidize and reduce the content of phosphorus and sulfur, then add Ti to reach the required chemical composition after detection, use the downcasting method to purify the impurities in the material, after the ...

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Abstract

The invention relates to a low-phosphorus and low-sulfur high-strength heat-resistant Cr35Ni45 nichrome welding wire and a preparation technology of the welding wire. The welding wire comprises, by mass, 0.35-0.45% of C, 1.20-1.60% of Si, 33.00-36.00% of Cr, 0.50-0.80% of Mn, 42.00-45.00% of Ni, 0.30-0.60% of Nb, 0.30-0.60% of Ti, 0.012%-0.014% of P, 0.007-0.009% of S, 0.25-0.30% of Al, 15.63-22.08% of Fe, and other unavoidable impurity elements. The preparation technology of the welding wire comprises the processes of vacuum smelting, homogenizing annealing, hot-forging cogging, multi-pass hot rolling, multi-pass cold drawing and finished product annealing. The welding wire has the good comprehensive mechanical property and well thermostable performance, the room temperature tensile strength of the welding wire is 1150-1250 MPa, and the room temperature percentage of elongation of the welding wire is 10-15%; and when the welding wire is tested at 1000 DEG C, the tensile strength is 600-700 MPa, and the elongation is greater than 25%.

Description

technical field [0001] The invention relates to the technical field of welding materials, in particular to a low-phosphorus-sulfur high-strength high-temperature-resistant Cr 35 Ni 45 Nickel-chromium alloy welding wire and its preparation process. Background technique [0002] Because nickel-chromium-based alloys have the characteristics of rust resistance, corrosion resistance, oxidation resistance, high toughness and high temperature resistance, they are used in many fields such as oil, natural gas and offshore oil industries, flue gas desulfurization systems of thermal power plants, nuclear power generation equipment, It has been widely used in the automotive industry and aerospace high temperature resistance. In these application fields, such as heat exchange tubes and plates in nuclear power generation equipment, dense welding is required. The welding materials used to weld these joints are nickel-based alloy welding materials, so nickel alloy pad wire materials are w...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B23K35/30B23K35/40
CPCB23K35/304B23K35/40
Inventor 唐玉冰唐汝来
Owner JIANGSU YULI NEW MATERIAL TECH
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