Wear-resistant iron-based welding wire

Abstract

The application discloses a wear-resistant iron-based welding wire, which comprises an outer skin and a powder core. The outer skin is made of stainless steel, and the powder core comprises metal nitride, hard carbide particles, metal powder and deoxidizing agent powder. The application uses metal nitride to provide nitrogen in the powder core of the welding wire, so that the welding layer is stable in austenite phase, and the use of nickel is replaced. The welding layer of the welding wire has the characteristics of non-magnetism and high wear resistance when welding.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of welding technology, in particular to a wear-resistant iron-based welding wire. BACKGROUND

[0002] In the geological exploration or oil and gas drilling operation, the detection of the geomagnetic field is used to adjust the direction of the drill bit. The drill bit part cannot be magnetized under the action of the geomagnetic field, so it is necessary to use non-magnetic materials. In the process of friction with the rock all the time, the parts such as drill collars supporting the drill bit will have serious wear, thereby changing the direction of the drill bit and affecting the progress of the drilling adjustment. In severe cases, the drill bit is broken and falls off, causing a lot of economic loss. Surfacing wear-resistant alloy on the surface of the non-magnetic part can effectively solve the problem of poor wear resistance, but in order not to affect the detection of the geomagnetic field, the wear-resistant alloy must also be non-magnetic (non-magnetic, not magnetized by the magnetic field). Austenite with face-centered cubic crystal structure is the best material, and considering the cost, austenitic iron-based material is the most suitable wear-resistant non-magnetic alloy.

[0003] The existing wear-resistant austenitic non-magnetic alloy mainly relies on the addition of a large amount of Ni and Mn elements to improve the stability of austenite. However, Ni is in short supply in China, and its cost is high, and it is also a strategic scarce resource in China.

[0004] Therefore, it is necessary to provide an iron-based welding wire for surfacing wear-resistant alloy on the surface of a non-magnetic part, which can provide a non-magnetic wear-resistant layer and reduce the use of nickel in the surfacing operation. SUMMARY

[0005] The technical problem solved by the present application is to provide a wear-resistant iron-based welding wire that can save nickel while obtaining a non-magnetic wear-resistant metal welding layer during the surfacing process.

[0006] To solve the above technical problems, the present application provides a wear-resistant iron-based welding wire, which comprises an outer skin and a powder core. The outer skin is stainless steel, and the powder core comprises metal nitride, hard carbide particles, alloy powder and deoxidizer powder. The mass percentage composition of the powder core comprises: 20%-28% of metal chromium, 25% of manganese nitride, 2%-5% of chromium nitride, 4%-6% of 75# silicon iron, 8%-10% of metal manganese, 30% of tungsten carbide, 6%-10% of chromium carbide, 3%-6% of metal molybdenum, and the balance of iron. The weight coefficient of the powder core in the wear-resistant iron-based welding wire is 25%-30%.

[0007] The application also provides the wear-resistant iron-based welding wire, which comprises an outer skin and a powder core.

[0008] The application also provides the wear-resistant iron-based welding wire, which comprises an outer skin and a powder core.

[0009] The application has the following beneficial effects: the wear-resistant iron-based welding wire provided by the application uses metal nitride to provide nitrogen in the powder core, thereby replacing the use of nickel, and the formation of the austenite structure of the welding layer is more stable during the welding operation, so that the wear resistance of the welding layer can be improved when the welding layer has the non-magnetic characteristic. DETAILED DESCRIPTION

[0010] The application has the following beneficial effects: the wear-resistant iron-based welding wire provided by the application uses metal nitride to provide nitrogen in the powder core, thereby replacing the use of nickel, and the formation of the austenite structure of the welding layer is more stable during the welding operation, so that the wear resistance of the welding layer can be improved when the welding layer has the non-magnetic characteristic.

[0011] The wear-resistant iron-based welding wire provided by the embodiment of the application comprises an outer skin and a powder core, the outer skin is stainless steel, and preferably 410 stainless steel (see GB / T 20878-2017, unified digital code: S41010, brand: 12Cr13).

[0012] The powder core comprises metal nitride, hard carbide particles, alloy powder and deoxidizer powder. The metal nitride comprises manganese nitride and chromium nitride. The hard carbide particles comprise at least one of tungsten carbide, chromium carbide and titanium carbide. The metal powder comprises metal chromium, molybdenum iron and metal molybdenum. Among them, manganese can improve the solubility of nitrogen in the metal nitride in the welding layer during the welding operation, chromium and molybdenum can improve the alloy strength. The deoxidizer mainly comprises 75# silicon iron (the mass percentage of silicon is 75%, and the balance is iron) and metal manganese, and manganese and silicon can jointly deoxidize to reduce the oxide inclusions in the welding seam.

[0013] The weight coefficient of the powder core in the wear-resistant iron-based welding wire is 25%-30%.

[0014] In one specific embodiment of the present application, the composition of the powder core of the wear-resistant iron-based welding wire comprises: metallic chromium, 20%-45%; manganese nitride, 20%-50%; chromium nitride, 2%-15%; 75# ferrosilicon, 4%-8%; metallic manganese, 5-15%; tungsten carbide, 6%-50%; chromium carbide, 0-30%; titanium carbide, 2%-20%; ferromolybdenum, 0%-10%; metallic molybdenum, 0%-10%; and iron, the balance. The above percentages are mass percentages.

[0015] In one specific embodiment of the present application, the composition of the powder core of the wear-resistant iron-based welding wire comprises: metallic chromium, 20%-45%; manganese nitride, 20%-50%; chromium nitride, 2%-15%; 75# ferrosilicon, 4%-8%; metallic manganese, 5-15%; tungsten carbide, 6%-50%; chromium carbide, 0-30%; titanium carbide, 2%-20%; ferromolybdenum, 0%-10%; metallic molybdenum, 0%-10%; and iron, the balance. The above percentages are mass percentages.

[0016] In one specific embodiment of the present application, the composition of the powder core of the wear-resistant iron-based welding wire comprises: metallic chromium, 20%-45%; manganese nitride, 20%-50%; chromium nitride, 2%-15%; 75# ferrosilicon, 4%-8%; metallic manganese, 5-15%; tungsten carbide, 6%-50%; chromium carbide, 0-30%; titanium carbide, 2%-20%; ferromolybdenum, 0%-10%; metallic molybdenum, 0%-10%; and iron, the balance. The above percentages are mass percentages.

[0017] In one specific embodiment of the present application, the composition of the powder core of the wear-resistant iron-based welding wire comprises: metallic chromium, 20%-45%; manganese nitride, 20%-50%; chromium nitride, 2%-15%; 75# ferrosilicon, 4%-8%; metallic manganese, 5-15%; tungsten carbide, 6%-50%; chromium carbide, 0-30%; titanium carbide, 2%-20%; ferromolybdenum, 0%-10%; metallic molybdenum, 0%-10%; and iron, the balance. The above percentages are mass percentages.

[0018] The diameter of the wear-resistant iron-based welding wire is 1.2mm-1.6mm. The particle size of the powder in the powder core is 60-80 mesh.

[0019] The wear-resistant iron-based welding wire of the embodiment of the present application uses metallic nitrides such as manganese nitride and chromium nitride as the nitrogen source, which is beneficial to the formation and stability of the austenite structure in the welding layer, replaces the use of nickel, and makes the welding layer have non-magnetic property; at the same time, through the hard carbide particles, the overall wear resistance of the welding layer is improved.

[0020] The above merely illustrates the embodiments of the present application, and does not limit the patent scope of the present application, and any equivalent structure or equivalent process transformation, or direct or indirect application in other related technical fields, are also included in the patent protection scope of the present application.

Claims

1. A hardwearing iron-based welding wire comprising a sheath and a core, the sheath being stainless steel, the core comprising a metal nitride, hard carbide particles, a metal powder and a deoxidiser powder, characterised in that, The mass percentage composition of the powder core comprises: metallic chromium, 20%-28%; manganese nitride, 25%; chromium nitride, 2%-5%; 75# ferrosilicon, 4%-6%; metallic manganese, 8%-10%; tungsten carbide, 30%; chromium carbide, 6%-10%; metallic molybdenum, 3%-6%; iron, the balance; and the weight coefficient of the powder core in the wear-resistant iron-based welding wire is 25%-30%.

2. The abrasion resistant iron-based welding wire of claim 1, wherein: The diameter of the wear-resistant iron-based welding wire is 1.2mm-1.6mm.

3. A hard facing iron-based welding wire comprising a sheath and a core, the sheath being stainless steel, the core comprising a metal nitride, hard carbide particles, a metal powder and a deoxidizer powder, characterized in that, The mass percentage composition of the powder core comprises: metallic chromium, 20%-28%; manganese nitride, 25%; chromium nitride, 2%-5%; 75# ferrosilicon, 4%-6%; metallic manganese, 8%-10%; tungsten carbide, 10%-15%; chromium carbide, 18%-20%; metallic molybdenum, 3%-6%; iron, the balance; and the weight coefficient of the powder core in the wear-resistant iron-based welding wire is 25%-30%.

4. The abrasion resistant iron-based welding wire of claim 3, wherein: The diameter of the wear-resistant iron-based welding wire is 1.2mm-1.6mm.

5. A hard facing iron-based welding wire comprising a sheath and a core, the sheath being stainless steel, the core comprising a metal nitride, hard carbide particles, a metal powder and a deoxidizer powder, characterized in that, The mass percentage composition of the powder core comprises: metallic chromium, 20%-28%; manganese nitride, 25%; chromium nitride, 2%-5%; 75# ferrosilicon, 4%-6%; metallic manganese, 8%-10%; tungsten carbide, 10%-15%; chromium carbide, 10%-13%; titanium carbide, 8%-11%; metallic molybdenum, 3%-6%; iron, the balance; and the weight coefficient of the powder core in the wear-resistant iron-based welding wire is 25%-30%.

6. The abrasion resistant iron-based welding wire of claim 5, wherein: The diameter of the wear-resistant iron-based welding wire is 1.2mm-1.6mm.