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Articles tagged with "temperature"
Results: 27
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Making hands-free straight, saddle, and miter cutsRovanco Piping Systems Inc. designs and fabricates piping systems for applications such as water (hot and cold), steam, and jet fuel. It sells fabricated pipe—typically with straight or miter end cuts—up to 36 inches in diameter. It provides preinsulated, high-temperature, low-temperature, and containment systems.
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The structure of metalLet's start with the obvious: Molten metals have no particular structure. The atoms that make up that metal are just whipping around helter-skelter—at a high rate of speed—with no real orderly, defined pattern.
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Phases, structures, and the influences of temperatureWhen you heat or cool a piece of metal to a specific temperature, that metal goes through what's called a phase change, in which its crystal structure changes. Sometimes the change is obvious. For example, when a piece of metal melts, it goes through a phase change when the crystal structure breaks down and the metal goes from solid to liquid. When it solidifies it's also a phase change, as the structure re-forms from liquid to solid.
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Making steels strongerWhen it comes to modifying a steel's strength and hardness, it's important to not confuse hardness with hardenability and remember that hardenability characteristics are important because they help identify how much a specific steel will harden during welding.
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Welding's effect on strengthening steelWelding can severely influence strengthened or hardened metals, depending on the hardening technique used. Because of this, post-weld heat treatment is often very helpful in maintaining weld joint strength because it softens or tempers any martensite or bainite that formed in the HAZ.
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Selecting the right materials for roll forming—Part 2: How mechanical properties affect productionThis is the second part of a two-part article. Read Part I. If you examine the mechanical properties of several materials, including carbon steel, alloyed steel, stainless steel, as they relate to roll forming, you'll gain an understanding of the influence of some primary metal processes on roll forming.
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Ensuring a plant's electrical system safety: One company's experience with infrared thermographyThis article takes a look at using infrared thermography in the plant setting to detect potential fire hazards. It discusses who can provide the service, what sorts of problems it can detect, and generally explains how the problems discovered when using this technology should be handled. It also uses an actual inspection as a basis for the discussion.
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When sparks fly ...This article combines examples of fires caused by inadequate protection from welding with information on heat-resistant textiles and how they can be used to provide that protection.
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Keep it clean: Selecting the right waste treatment optionAre you having problems with wastewater discharges from your metalworking facility? Have you received a violation notice from your sewer use authority? Do your environmental experts speak a language you don't understand or continually reject new fluids you would like to use? Or perhaps you would like to use new or improved lubricants, cleaners, rust preventives, or detergents, but the products you've tried have failed the waste treatment tests.
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Experimenting with flexible blank holder force control: Prototype shows promise for difficult-to-form materialsThe quality of deep drawn sheet metal products is determined largely by the rate at which a sheet is drawn into a die. Varying blank holder force (BHF) as a function of time or the press stroke is of great importance.
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Appliance industry takes a shine to powder blank technologyAmong European, Pacific Rim, and U.S. appliance makers and other manufacturers with large-scale, appliance-grade finishing requirements, the use of powder blank line coating systems has grown steadily during the past 10 years.
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Resisting cracking, deformation, and premature wear: Powder metallurgical steels provide an alternative to conventional tool steelsWant to know how powder metallurgical tool steels are produced and how their properties provide the material's toughness and wear resistance? Read on.
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Cutting die-related costs: Where to look to save moneyDemands for cheaper, better, and faster tooling for stampings and the pace of business continue to escalate. This trend is not going to reverse itself.
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Tooling tricks of the trade: A few tips for extending die life |
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Choosing the proper steel to minimize abrasive adhesive tool wearThe most disruptive type of failure in any tooling application is when the tool cracks. To prevent this type of failure in cold-work applications, it's important to select the correct steel.
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The little-known life of the scarfing tool: Focusing on a small device to see the bigger pictureWho cares about scarfing tools? There are more important things in life. When the beauty pageant contestant is asked what problem she would like to solve, she's more likely to answer "I'd like to establish world peace" than "I wish I could find ways to help scarfing tools last longer."
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Making seamless tubing with a floating mandrel mill |
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Troubleshooting Guide for CleanersRust, wear, and dirt cost tube fabricators and producers millions of dollars annually, and they can be the bane of tube processes. Analyzing the criteria for selecting the lubricant, cleaner, and rust preventative can help provide maximum protection.
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Secrets of Using GTAW for Tools and Dies: One retired fabricator share the basics of how he added this services to his shopTool and die welding can be a very lucrative service for a fab shop. However, tool and die welders are about as rare as brain surgeons because of a general lack of knowledge about the process and because of the extra expense it brings to a shop. This article offers a basic understanding of what's needed to add this service to your fab shop.
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It's all about precision, craftsmanship: Shop makes commitment to solid welding practicesA case study looking at how Superior Joining Technologies Inc. got into the microwelding business, the welding equipment they use, how the meet customer requirements, and how they use a solid foundation in welding to keep up with today's stringent requirements.
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The fundamentals of gas tungsten arc welding: Preparation, consumables, and equipment necessary for the processLearning the fundamentals of the GTAW process will increase the welder's ability to produce quality weldments. Knowing the correct consumables, equipment, and preweld preparation necessary will help the welder troubleshoot welding problems.
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Choosing the right oxyfuel gas and supply systemMixing oxygen with fuel gases for brazing, cutting, heating, and welding metal has been around since the early 1900s. Oxyfuel processes have remained in use over the years despite the introduction of other metal fabrication processes, such as arc welding, plasma cutting, and laser materials processing. Finding the most economical method for supplying oxyfuel gases requires a basic understanding of the process.
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Welders turn to induction heating for preheating, stress relievingThis article discusses using induction heating for preheating and (postheating) stress relief of welds. It focuses on what this technology is, how it works, and how it can be used in an industrial setting. This article also gives several real-life examples of how the technology has been used in actual applications.
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Keys to success in laser welding: What every laser user needs to knowAlthough a firm grasp of laser physics, metallurgy, tooling and fixturing, weld process parameters, and part strength testing is necessary to implement laser technology in any manufacturing facility, it's also critical to think of other issues that will impact the success of your laser use. Some keys to a successful laser project include involving production personnel early in the process, choosing a laser technology advocate, considering your shop's ambient environment, using trained operators and maintenance personnel, and planning for spare parts and maintenance.
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Understanding weld discontinuities |
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What you don't know about spot welding: Some lesser-known uses of resistance welding equipmentResistance welding equipment has many uses that many people often don't think about. Everyday items that some may not associate with resistance welding owe their very existence to this versatile process.
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Repair Brazing: Fixing Faulty Jobs and worn-out componentsBrazing has myriad uses for shop repairs. Knowing what seperates a proper brazing job from a poop one can save you alot of headaches and produce some slick results in the process.
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