Store Papers Supplies » mig http://www.storepapers.com Sun, 02 May 2010 13:04:13 +0000 http://wordpress.org/?v=2.9.2 en hourly 1 Welding Defects – How to Prevent Them! http://www.storepapers.com/supplies/welding-defects-how-to-prevent-them/ http://www.storepapers.com/supplies/welding-defects-how-to-prevent-them/#comments Sat, 07 Mar 2009 07:01:17 +0000 admin http://www.storepapers.com/supplies/welding-defects-how-to-prevent-them/ There are welding defects that are sometimes overlooked or not considered. Each welding project requires careful considerations. They include:

  • The process, the type of welding i.e. stick, MIG, TIG.

  • The composition of the base metal and thickness.

  • The weldin...]]> There are welding defects that are sometimes overlooked or not considered. Each welding project requires careful considerations. They include:

  • The process, the type of welding i.e. stick, MIG, TIG.

  • The composition of the base metal and thickness.

  • The welding position, i. e. flat, vertical, horizontal, overhead.

  • The weld joint and type.

  • Electrical supply and equipment.

  • And finally, the welding techniques to be used.

    • To minimize the chance of welding defects be sure to consider 1) the travel speed of the pass; 2) the size and type electrode; 3) machine settings; 4) make sure the welding is done in accordance with the plan and the current conditions.

    Most of, or a great deal of, welding defects can be identified by the “naked eye.” By knowing what is likely to produce welding defects you will learn how to avoid them. Production without defects saves time, materials, repair costs, and a decrease in productivity.

    The two following causes for weld rejection should not be but are often overlooked 1) is the weldor proficient with the process being used? 2) is the welding rod supply up to standards? Use only properly stored, dried, and maintained welding rods.

    Welding defects include poor penetration. It’s the failure of the welding rod and base metal to fuse together. It’s caused by a root face that is too big; a root opening that is too small; an electrode that’s too large; slow travel speed or a machine setting that’s too low.

    Poor fusion is the failure to blend the layers of weld metal together with the base metal. A lack of fusion is caused by ” . . . failure to raise to the melting point of the base metal or the deposited weld metal,” (Miller Electric Mfg. Co.) It’s caused by improper fluxing; dirty plate surfaces; improper electrode size or type; wrong current settings. Electrodes that do not meet the storing, drying and maintenance specifications also cause it.

    Undercutting is another problem that causes welding defects. It burns away the base metal at the toe of the weld. It’s caused by a current adjustment that is too high; an arc gap that is too long or failure to fill up the crater completely with weld metal.

    Porosity looks “sponge like,” or like tiny “bubbles” in the weld. It’s caused by gases being released by the cooling weld because a current setting is too high or arc is too long.

    Slag inclusion occurs when the slag is not chipped and cleaned properly and then another pass is made over the top. To avoid, 1) prepare the groove and weld properly before each pass; 2) thoroughly clean in between passes; check the machine settings against those suggested by the manufacturer; 3) hold a smaller weld puddle.

    Martin Rice teaches college level welding, in addition to writing articles for RodOvens.com, where you can purchase Welding Rod Ovens online.

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    ]]> http://www.storepapers.com/supplies/welding-defects-how-to-prevent-them/feed/ 0     The Portable Rod Oven An Indispensable Welding Tool http://www.storepapers.com/supplies/the-portable-rod-oven-an-indispensable-welding-tool/ http://www.storepapers.com/supplies/the-portable-rod-oven-an-indispensable-welding-tool/#comments Sun, 23 Nov 2008 12:12:00 +0000 admin http://www.storepapers.com/supplies/the-portable-rod-oven-an-indispensable-welding-tool/ The portable rod oven is an indispensable welding tool to have while on the welding job. As one of the many welding accessories available to welders, the welding rod oven - also referred to as an electrode oven, hot box or welding electrode stabilizing oven - has been refined and redesigned over ...]]> The portable rod oven is an indispensable welding tool to have while on the welding job. As one of the many welding accessories available to welders, the welding rod oven – also referred to as an electrode oven, hot box or welding electrode stabilizing oven – has been refined and redesigned over the years in order to accommodate welders that operate in a variety of challenging environments.

    The portable range of rod ovens seeks to provide the welder a convenient means to maintain electrodes at optimum temperatures where the welding job may take them.

    The portable rod holding oven is used all over the world for welding projects. This highly important tool comes in a variety of shapes and sizes. From round cylindrical shapes which stand upright, to rectangular models shaped like tool boxes, these valuable tools have been designed in many different ways to enhance the portability for welders.

    The trend in welding rod oven design has been to increase the light weight nature of the product so that the user is not burdened with a heavy, cumbersome tool that is difficult to operate and bring to the field. Most rod ovens are made of painted steel and treated with a chemical resistant finish to protect against damage from chemicals and exposure to the elements.

    For welder testing and approval, some states even require that a rod oven be used on site at all times for all low-hydrogen welding jobs. This demonstrates the importance of the rod oven as a welding tool in today’s industry. Many problems can result in the weld if improper welding rod storage procedures are not followed on site such as porosity, hydrogen embrittlement and cracking.

    Proper welding rod maintenance is absolutely essential in welding and should not be overlooked. Opened, low-hydrogen welding rod containers are unfortunately a familiar sight at welding jobs, with many welders not paying attention to the ramifications of improper storage. This can lead to many problems down the road, possibly costing many thousands of dollars in repair work and time.

    Martin Rice is a writer for RodOvens.com, where we make it an objective to educate consumers about the benefits of using this crucial welding storage tool. At RodOvens.com, better welds are our business. Our objective is to make rod ovens affordable for welders by selling directly online, and avoiding cost-doubling and cost-tripling distribution methods that are common in the welding industry.

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