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A spraying material and high nitrogen steel welding process based on thermal spraying pretreatment

A spraying material and welding process technology, applied in welding equipment, welding medium, welding equipment, etc., can solve the problems of precipitation pores, reduction of nitrogen content in weld seam, precipitation of nitrides, etc., to solve the problem of reducing nitrogen content and reducing melting amount , the effect of uniform coating distribution

Active Publication Date: 2022-06-21
JILIN AGRI SCI & TECH COLLEGE
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] In order to solve the defect problems such as the reduction of weld nitrogen content, the precipitation of nitrides, and precipitation-type pores in the existing high-nitrogen steel welding method, the present invention provides a spraying material and a high-nitrogen steel welding process based on thermal spraying pretreatment

Method used

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  • A spraying material and high nitrogen steel welding process based on thermal spraying pretreatment
  • A spraying material and high nitrogen steel welding process based on thermal spraying pretreatment
  • A spraying material and high nitrogen steel welding process based on thermal spraying pretreatment

Examples

Experimental program
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Effect test

Embodiment 1

[0039] Example 1 High nitrogen steel welding process based on thermal spray pretreatment

[0040] 1. Preparation of spraying materials

[0041] The spraying material is composed of 21%wt Cr, 69%wt Mn, 3%wt TiN and 7%wt Ni, and the spraying material is atomized so that the particle size of the abrasive is controlled within 0.1mm;

[0042] 2. Preprocessing

[0043] 2.1 Use an angle grinder to remove the surface oxide film of two high nitrogen steel plates with a thickness of 8.0mm and a nitrogen content of 0.62%, and then use acetone to remove the surface oil;

[0044] 2.2 The high-nitrogen steel welding groove is refined and sandblasted by the suction-type sand blower; the pressure of the suction-type sand blower is set to 0.45MPa, and the sand blowing angle is set to 30°;

[0045] 2.3 Use the flame spraying treatment method to spray the spraying material with a thickness of 0.5mm on the welding groove of the high nitrogen steel.

[0046] 3. High energy beam welding (laser w...

Embodiment 2

[0050] Embodiment 2 High nitrogen steel welding process based on thermal spraying pretreatment

[0051] 1. Preparation of spraying materials

[0052] The spraying material is composed of 21%wt Cr, 69%wt Mn, 3%wt TiN and 7%wt Ni, and the spraying material is atomized so that the particle size of the abrasive is controlled within 0.1mm;

[0053] 2. Preprocessing

[0054] 2.1 Use an angle grinder to remove the surface oxide film of two high nitrogen steel plates with a thickness of 6.0mm and a nitrogen content of 0.62%, and then use acetone to remove the surface oil;

[0055]2.2 The high-nitrogen steel welding groove is refined and sandblasted by the suction-type sand blower; the pressure of the suction-type sand blower is set to 0.45MPa, and the sand blowing angle is set to 30°;

[0056] 2.3 Use the flame spray treatment method to spray the spray material with a thickness of 0.4mm on the welding groove of the high nitrogen steel.

[0057] 3. High energy beam welding (laser we...

Embodiment 3

[0061] Example 3 High nitrogen steel welding process based on thermal spray pretreatment

[0062] 1. Preparation of spraying materials

[0063] The spraying material is composed of 21%wt Cr, 69%wt Mn, 3%wt TiN and 7%wt Ni, and the spraying material is atomized so that the particle size of the abrasive is controlled within 0.1mm;

[0064] 2. Preprocessing

[0065] 2.1 Use an angle grinder to remove the surface oxide film of two high nitrogen steel plates with a thickness of 4.0mm and a nitrogen content of 0.62%, and then use acetone to remove the surface oil;

[0066] 2.2 The high-nitrogen steel welding groove is refined and sandblasted by the suction-type sand blower; the pressure of the suction-type sand blower is set to 0.45MPa, and the sand blowing angle is set to 30°;

[0067] 2.3 Use the flame spray treatment method to spray the spray material with a thickness of 0.3mm on the welding groove of the high nitrogen steel.

[0068] 3. High energy beam welding (electron beam...

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Abstract

A spraying material and a high-nitrogen steel welding process based on thermal spraying pretreatment relate to the field of high-nitrogen steel welding. The spraying material is composed of 21%wt Cr, 69%wt Mn, 3%wt TiN and 7%wt Ni. The welding process includes: preparation of spraying materials and atomization treatment; grinding and blasting the welding groove of high nitrogen steel, and spraying the spraying material on the welding groove of high nitrogen steel by thermal spraying method; High nitrogen steel for high energy beam welding. The present invention pre-sets the alloy coating at the welding groove of the high-nitrogen steel to reduce the amount of melting of the base metal during welding, and at the same time, the composition of the alloy coating can effectively improve the solubility of nitrogen in the steel, thereby solving the problem of reducing the nitrogen content of the weld seam and reducing the nitrogen content. Problems such as compound precipitation and precipitation-type pore defects. The invention adopts the thermal spraying pretreatment method to pre-preset the alloy coating at the welding groove of the high-nitrogen steel, which improves the work efficiency, and the coating is evenly distributed and not easy to fall off.

Description

technical field [0001] The invention relates to the technical field of high-nitrogen steel welding technology, in particular to a spraying material and a high-nitrogen steel welding process based on thermal spraying pretreatment. Background technique [0002] High nitrogen austenitic stainless steel, referred to as high nitrogen steel, is a new type of engineering material with high strength, high toughness, high creep resistance and good corrosion resistance, which has attracted much attention in recent years. The N content in high-nitrogen steel is generally greater than 0.4%. Due to the high nitrogen content, defects such as nitrogen loss, nitride precipitation, and welding pores are prone to occur in the weld, so its welding performance has received extensive attention in the industry. [0003] The Chinese patent with publication number CN105772944A discloses a "welding device and welding method for solving high-nitrogen steel welding pores and improving joint strength",...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B23K9/235B23K9/32B23K35/30
CPCB23K9/235B23K9/32B23K35/3026
Inventor 崔博黄初焕张龙冯明佳罗添文孙丽娜吕尤王莉婷李享
Owner JILIN AGRI SCI & TECH COLLEGE
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