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Welding process method for precipitated casting high-temperature alloy castings

A welding process and high-temperature alloy technology, applied in manufacturing tools, welding equipment, welding accessories, etc., can solve the problem of high product scrapping rate

Inactive Publication Date: 2020-05-12
AEROSPACE HIWING HARBIN TITANIUM IND
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] The invention solves the technical problem that liquefaction cracks are repeatedly generated in the welding process of superalloy castings and cannot be repaired, resulting in high product scrap rate, and provides a welding process method for precipitation casting superalloy castings

Method used

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  • Welding process method for precipitated casting high-temperature alloy castings
  • Welding process method for precipitated casting high-temperature alloy castings
  • Welding process method for precipitated casting high-temperature alloy castings

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specific Embodiment approach 1

[0029] Specific implementation mode one: the specific steps of the welding process of a precipitation casting superalloy (brand name: K4169) casting in the present implementation mode are as follows:

[0030] 1. Cleaning before welding: wipe the welding wire and workpiece with absolute ethanol to remove impurities on the surface of the workpiece and welding wire;

[0031] 2. Gap processing: Grind a 60° single V-shaped groove on the position on the workpiece that needs to be repaired;

[0032] 3. Welding: The filler wire and the welding process are carried out under the protection of argon gas. Welding is carried out by reverse arc ignition and arc extinguishing and filling the arc crater. The welding process parameters include: welding current 20A, welding speed 18mm / min, Argon gas flow rate is 5L / min;

[0033] 4. Cooling: during the welding process, pour clear water to the heat-affected zone for each surfacing thickness of 1mm, and then proceed to the next layer of surfacing...

specific Embodiment approach 2

[0038] Specific embodiment two: the specific steps of the welding process method of a kind of precipitation casting superalloy (brand is: K4169) casting in the present embodiment are as follows:

[0039] 1. Cleaning before welding: wipe the welding wire and workpiece with absolute ethanol to remove impurities on the surface of the workpiece and welding wire;

[0040] 2. Gap processing: Grind a 60° single V-shaped groove on the position on the workpiece that needs to be repaired;

[0041] 3. Welding: The filler wire and the welding process are carried out under the protection of argon gas, and the welding is carried out by reverse arc ignition and arc extinguishing and filling the arc crater. The welding process parameters include: welding current 40A, welding speed 18mm / min, Argon gas flow rate is 8L / min;

[0042] 4. Cooling: during the welding process, pour clear water to the heat-affected zone for each surfacing thickness of 1mm, and then proceed to the next layer of surfac...

specific Embodiment approach 3

[0047] Specific embodiment three: a kind of precipitation type casting superalloy (brand is: K4169) casting welding process method specific steps in this embodiment are as follows:

[0048] 1. Cleaning before welding: wipe the welding wire and workpiece with absolute ethanol to remove impurities on the surface of the workpiece and welding wire;

[0049] 2. Gap processing: Grind out a 70° single V-shaped groove on the position on the workpiece that needs to be repaired;

[0050] 3. Welding: The filler wire and the welding process are carried out under the protection of argon gas. Welding is carried out by reverse arc ignition and arc extinguishing and filling the arc crater. The welding process parameters include: welding current 50A, welding speed 18mm / min, Argon gas flow rate is 10L / min;

[0051] 4. Cooling: during the welding process, pour clear water to the heat-affected zone for each surfacing thickness of 1mm, and then proceed to the next layer of surfacing;

[0052] Th...

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Abstract

The invention discloses a welding process method for precipitated casting high-temperature alloy castings, and belongs to the technical field of precision casting repair welding. The welding process method solves the technical problem that the product scrap rate is high due to the fact that in the welding process of the high-temperature alloy castings, liquefied cracks are generated repeatedly andthe high-temperature alloy castings cannot be repaired. The method comprises the following steps that 1, absolute ethyl alcohol or acetone is used for clearing a welding wire and a workpiece before welding; 2, a single V-shaped groove is ground out; 3, welding is carried out, and specifically, the mode of reverse arc striking and arc quenching, and arc crater filling is adopted for welding underthe protection of argon; and 4, clear water is poured into a heat affected area in the welding process, and then surfacing is carried out on a next layer. According to the welding process method, water spraying cooling is carried out in the welding process to reduce high-temperature residence time of the welding heat affected area and a base material matrix, cooling is effectively carried out, andthen surfacing is carried out on the next layer, so that the repeated generation of the liquefied cracks are reduced and even avoided, and the product qualification rate is further improved.

Description

technical field [0001] The invention belongs to the technical field of precision casting repair welding, and in particular relates to a welding process method for precipitation casting superalloy castings. Background technique [0002] Superalloys are based on Fe, Ni and Co, and are a class of alloy materials with excellent comprehensive mechanical properties, corrosion resistance and fatigue resistance at temperatures above 600°C and under stress. Based on their outstanding performance in high-temperature working environments, Superalloys are widely used in aero-engines, aerospace engines, gas turbines, nuclear power, petrochemical and other fields. Cast superalloys can be divided into solid solution strengthening type and precipitation strengthening type (aging strengthening type) according to the strengthening type. The process of joining or repairing workpieces by local melting is one of the forming and preparation processes of high temperature alloy materials. High tem...

Claims

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Application Information

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IPC IPC(8): B23K9/04B23K9/16B23K9/235B23K9/32B23K33/00
CPCB23K9/16B23K9/235B23K9/04B23K33/004B23K9/32
Inventor 王磊晏福宾周文亮姜啸周磊姜青阳
Owner AEROSPACE HIWING HARBIN TITANIUM IND
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