After the effects of heat on metal are discussed, later in the chapter, you will understand the significance of the buildup sequence and the importance of controlling the interpass temperature.
Across-sectional view of a fillet weld (fig. 3-16) is triangular in shape. This weld is used to join two surfaces that are at approximately right angles to each other in a lap, tee, or comer joint.
Surfacing is a welding process used to apply a hard, wear-resistant layer of metal to surfaces or edges of worn-out parts. It is one of the most economical methods of conserving and extending the life of machines, tools, and construction equipment. As you can see in figure 3-17, a surfacing weld is composed of one or more stringer or weave beads. Surfacing, sometimes known as hardfacing or wearfacing, is often used to build up worn shafts, gears, or cutting edges. You will learn more about this type of welding in chapter 6 of this training manual.
A tack weld is a weld made to hold parts of an assembly in proper alignment temporarily until the final welds are made. Although the sizes of tack welds are not specified, they are normally between 1/2 inch to 3/4 inch in length, but never more than 1 inch in length. In determining the size and number of tack welds for a specific job, you should consider thicknesses of the metals being joined and the complexity of the object being assembled.
here is information on Hard surfacing welding
In the list below we will list a few types of surfacing welding types
Hard Surfacing (or surface welding) has somehow become a trade secret. It’s an incredibly useful process buried in a mountain of complicated details, surrounded by a circus of welding elite all chanting “you’re doing it wrong.” We’ll no more, friends. We’re giving you a place to start with our basic guide to hard surfacing.
What is hard surfacing? Simply put, it’s literally just welding a reinforced layer to a piece of metal. Generally surface welding is done on metal surfaces that tend to wear down quicker. We’re talking lawn mower blades, front-end loader buckets, snowmobile skags, or Julia Robert’s toothbrush.
Hardfacing is a metalworking process where harder or tougher material is applied to a base metal. It is welded to the base material, and generally takes the form of specialized electrodes for arc welding or filler rod for oxyacetylene and gas tungsten arc welding (TIG) welding. Powder metal alloys are used in (PTA) also called powder plasma welding and thermal spray processes like high-velocity oxygen fuel coating (HVOF), plasma spray, spray and fuse, etc.SAW , FCAW and MIG / MAG uses continuously fed wire varying in diameter depending on process and current Strip cladding process uses strips from 50 mm wide to 125 mm with a thickness of 0.5mm. Open arc welding uses continuously fed tubular electrode which may or may not contain flux.
Cladding is the bonding together of dissimilar metals. It is different from fusion welding or gluing as a method to fasten the metals together. Cladding is often achieved by extruding two metals through a die as well as pressing or rolling sheets together under high pressure.
Clad welding is the process of adding a material to the surface of a component, rather than joining it to another piece. This is helpful in changing the design of, adding a protective layer to, or repairing an existing component. Its popularity has risen due to the cost-effectiveness of the process. And with the high quality laser cladding machines offered by OR LASER that process is even more affordable.
At OR LASER, we’ve spent nearly two decades designing and manufacturing innovative lasers for the manufacturing industry. Our rigorous testing standards ensure top notch products and our serial production helps drive down costs. We offer both wire and powder laser clad welding machines and our units are suitable for use in:
- High production environments
- Big and small jobs
- Mobile or stationary applications
Clad welding helps add value to businesses by making cost-efficient repairs, reducing ‘out of service’ times, and drastically cutting back on the need to buy expensive new parts. Find out how OR LASER can help you with your clad welding needs.