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What types of wear-resistant band materials are suitable for ARNCO 100XT/200XT/300XT Semi-automatic wear-resistant band welder? When welding wear-resistant bands of different materials, what parameters need to be adjusted or set for the welding machine?
The wear-resistant band materials suitable for ARNCO 100XT/200XT/300XT Semi-automatic wear-resistant band welder and the parameter adjustments when welding different materials are as follows:
Applicable wear-resistant band materials
ARNCO 100XT: 100XT itself is an iron-based alloy flux-cored welding wire material, suitable for wear-resistant band surfacing of downhole tools such as drill pipes, weighted drill pipes, drill collars, stabilizers, shock absorbers, etc. It contains elements such as chromium, manganese and molybdenum, has a Rockwell hardness of more than 50, and is a casing-friendly material with a low friction coefficient. It can protect the drill pipe joints while reducing friction damage to casing, offshore drilling water blockers and blowout preventers.
ARNCO 200XT: 200XT is also a wear-resistant flux-cored wire of iron-based alloy. It is a self-shielded wire that does not require additional shielding gas. It can be used for wear-resistant belt welding of oil drilling tools such as drill pipes that have certain requirements for wear resistance, which can improve the wear resistance life of drilling tools to a certain extent.
ARNCO 300XT: 300XT is a chromium-free iron-based alloy containing elements such as nickel, boron and niobium. It is suitable for wear-resistant belt welding of tools such as drill pipes, weighted drill pipes, drill collars, etc. drilled in open-hole formations with extremely abrasive geological structures. Its Rockwell hardness of more than 60 ensures ideal friction and balanced protection between the drill pipe joint and the casing, and the radial wear on the inside of the casing is minimized, which can provide two-way protection for the drill pipe and casing.
Parameter adjustment when welding different materials
Current
Welding thicker or thermally conductive wear-resistant belt materials: If the welding thickness is large or some high thermal conductivity alloy steel wear-resistant belt materials, it is necessary to increase the current appropriately. For example, for ARNCO 100XT/300XT, the current may need to be increased from the conventional 160-180A to 180-220A to ensure that the welding wire is fully melted and has sufficient penetration depth to ensure better bonding between the wear-resistant belt and the parent material.
Welding thinner or low melting point materials: When welding thinner wear-resistant belts or low melting point alloy materials, the current should be reduced to prevent burn-through or overheating that causes alloy element burnout to ensure welding quality. The current may be controlled at 120-160A.
Voltage
Matching with current: Generally, the principle of increasing voltage as the current increases is followed. For example, when using ARNCO 200XT for welding, when the current is 150A, the voltage is more suitable at 22-24V; when the current is increased to 200A, the voltage should be adjusted to about 24-26V.
Controlling the penetration depth: For wear-resistant belt materials with higher hardness and shallower penetration depth so that more alloy elements remain on the surface to improve wear resistance, such as some wear-resistant materials containing tungsten carbide particles, the voltage can be appropriately increased to reduce the penetration depth.
Shielding gas
ARNCO 100XT and 300XT: Shielding gas is required during welding. Pure carbon dioxide can be used, or a mixture of argon and carbon dioxide can be used, such as 82% argon/18% carbon dioxide, 80% argon/20% carbon dioxide or 75% argon/25% carbon dioxide. The gas flow rate needs to be maintained at 30 to 35CFH (14-16.5LPM).
ARNCO 200XT: Because it is a self-shielded welding wire, no additional shielding gas is required.
Preheating temperature: If the base metal type of the wear-resistant belt is different, the preheating temperature will also be different. For example, when welding alloy steel base metal and ordinary carbon steel base metal, the preheating temperature of alloy steel base metal is usually higher than that of ordinary carbon steel. The specific temperature needs to be determined according to the specific material and thickness of the base metal, refer to the relevant welding process manual or through experiments.
