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Nickel-chromium-molybdenum-niobium corrosion resistant welded alloy and manufacturing method thereof

A welding alloy and manufacturing method technology, applied in the field of corrosion-resistant alloy casting, can solve the problems of large gap in crack resistance, unfavorable processing and forging, poor corrosion resistance, etc., and achieve improved mechanical properties, improved steel rolling plasticity, excellent high temperature and The effect of ultra-low temperature mechanical properties

Inactive Publication Date: 2015-02-11
DANYANG XINHANG SPECIAL ALLOY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] Nickel-chromium-molybdenum alloys are often used as welding electrodes for dissimilar materials. In the prior art, the corrosion resistance of the deposited metal is poor, and it is difficult to maintain good corrosion resistance under harsh conditions, and the tensile strength is low. It is not conducive to subsequent processing and forging, and the crack resistance performance is far from that of the base metal

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0017] The nickel-chromium-molybdenum-niobium corrosion-resistant welding alloy of this embodiment has the following components and weight percentages: Cr 21%, Mo 10%, Nb 4.0%, Ti 0.2%, Al 0.2%, Y 0.05%, and the balance is Ni.

Embodiment 2

[0019] The nickel-chromium-molybdenum-niobium corrosion-resistant welding alloy of this embodiment has the following components and weight percentages: Cr 22%, Mo 9%, Nb 3.5%, Ti 0.25%, Al 0.2%, Y 0.05%, and the balance is Ni.

Embodiment 3

[0021] The nickel-chromium-molybdenum-niobium corrosion-resistant welding alloy of this embodiment has the following components and weight percentages: Cr 23%, Mo 8.5%, Nb 3.2%, Ti 0.2%, Al 0.25%, Y 0.05%, and the balance is Ni.

[0022] The manufacture method of the nickel-chromium-molybdenum-niobium corrosion-resistant welding alloy of above-mentioned embodiment 1-3 comprises:

[0023] a. Smelting: Baking all the raw materials before smelting, and then according to the formula configuration, input Ni, Cr, Mo, Nb raw materials at one time, after all the materials are melted, enter the refining period for 15-20 minutes, and finally fill the gas, in the gas Add trace alloy elements Ti, Al, and Y under protection, and cast into steel ingots after 5 minutes;

[0024] b. Forging: Heating the steel ingot, then forging it to a certain size, and taking it out for grinding to remove defects such as surface cracks and warped skin;

[0025] c. Steel rolling: heating the forged steel ...

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Abstract

The invention relates to a nickel-chromium-molybdenum-niobium corrosion resistant welded alloy, which is composed of the following components in percentage by weight: 21 to 23% of Cr, 8.5 to 10% of Mo, 3.2 to 4.0% of Nb, 0.1 to 0.3% of Ti, 0.1 to 0.3% of Al, 0.04 to 0.06% of Y, and the balance being Ni. A certain amount of titanium and aluminum is added so as to strengthen the deoxidation effect of the alloy steel and reduce the gas content (H, O, and N) of the alloy steel. Metal yttrium is added to improve the rolling plasticity of the alloy steel, moreover the post processing and forging of alloy steel become easier, and the mechanical performance of the deposited metal, which is generated during the welding process, is improved. The added niobium and molybdenum both strengthen the alloy. The alloy has an excellent pitting corrosion and gap corrosion resistant performance, an excellent high-temperature and ultralow-temperature mechanical performance, and good anti-corrosion performance under severe environment. The alloy is widely used in industries such as chemical engineering, aviation, marine engineering, pollution control box of nuclear reaction equipment, and the like, is mainly used for welding of abnormal shaped steel and nickel based alloy, and can be also used for steel and surface built-up welding.

Description

technical field [0001] The invention relates to a corrosion-resistant alloy casting technology, in particular to a nickel-chromium-molybdenum-niobium corrosion-resistant welding alloy and a manufacturing method thereof. Background technique [0002] Nickel-chromium-molybdenum-niobium alloy is an alloy with high strength and good plasticity, which is widely used in chemical industry, aviation, marine engineering, pollution control and nuclear reaction equipment. [0003] Nickel-chromium-molybdenum alloys are often used as welding electrodes for dissimilar materials. In the prior art, the corrosion resistance of the deposited metal is poor, and it is difficult to maintain good corrosion resistance under harsh conditions, and the tensile strength is low. It is not conducive to subsequent processing and forging, and the crack resistance performance is far from that of the base metal. Contents of the invention [0004] The technical problem to be solved by the present inventio...

Claims

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Application Information

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IPC IPC(8): C22C19/05C22C1/02C22F1/10
Inventor 朱新军
Owner DANYANG XINHANG SPECIAL ALLOY