Luoyang HongtengIntermediate frequency induction furnace
My Honest Review After Months of Testing Let’s be real—choosing the best furnace for melting gold isn’t as simple as it sounds. When I first started, I thought all furnaces did the same job: heat metal until it melts. But after ruining a few batches of gold and spending way too much money on models that couldn’t hold a stable temperature, I realized how wrong I was. If you’re reading this, you’re probably in the same boat—trying to figure out which furnace will actually work for your refining projects without overheating, burning through crucibles, or giving inconsistent melts. I’ve been there, tested dozens, and today I’m breaking down what really matters. This isn’t a technical manual. Think of it as advice from someone who’s burned a few mistakes (and some gold) before getting it right. What Makes a Great Gold Melting Furnace? Before diving into models, let’s get one thing straight—what separates the best furnace from the mediocre ones isn’t just heat. It’s about control, efficiency, and durability. Here’s what I learned the hard way: Temperature Accuracy – Hitting 1,100°C isn’t hard. Staying there consistently without wild fluctuations is. Heating Speed – A good furnace should melt 1 kg of...
Portable Gold Smelter Machine: My Honest Experience & Buyer’s Guide Let’s be real—if you’ve ever tried to melt gold in a makeshift setup, you already know how frustrating it can be. I’ve been there too. The endless trial-and-error with DIY furnaces, the wasted time waiting for uneven heating, and the disappointment of clumpy, half-melted results—it’s enough to make anyone give up. That’s why when I finally switched to a portable gold smelter machine, the difference was night and day. And I want to save you that same headache by sharing what I learned. This isn’t going to be some dry technical brochure. Think of it as a friend’s honest breakdown of what works, what doesn’t, and how you can avoid the pitfalls I went through. Why Portable Gold Smelter Machines Are a Game-Changer Gold melting used to feel like a hassle: big bulky furnaces, high fuel costs, and setups that only made sense for industrial plants. Portable smelters flip that script. They’re compact, energy-efficient, and easy to carry—whether you’re a jeweler, small refinery, or hobbyist. And here’s the kicker: a good portable gold smelter machine doesn’t just melt faster, it gives you consistent, controllable results. That means no more overheating,...
Small Household Gold I had a few old gold rings, broken chains, and a couple of coins just sitting in a drawer. I didn’t want to sell them, but I also didn’t want them collecting dust forever. I thought: “What if I could melt th So I did what anyone would do—I searched online. And that’s when things got messy. I saw DIY hacks involving propane torches (too risky), huge industrial machines (way over my budget), and tiny cheap gadgets that honestly loo After wasting time and money on one cheap furnace that literally overheated and cracked, I told myself: “Enough. I’ll find t This article is exactly that. It’s not a boring technical list—it’s my real journey testing small household gold mel, and my honest thoughts on which ones are worth your attention. What Is In plain English: it’s a c that lets you melt gold (and other metals like si T: usually up to 1150–1200°C (enough for gol Batch Size: sma P: mostly plug-and-play electr The beauty of these furnaces is they’re designed for hobby jewele—not giant factories. My Real Test Experien Here’s how my first Setup – P Loading Gol – Dropped in my b Melting –...
Trempe et refroidissement Clearly, quenching and cooling are an essential part of the induction hardening process. Natural cooling is rarely used due to its slowness; most quenching uses forced cooling with water, oil, brine, or moving air. Crystal is most commonly used due to its excellent thermal conductivity. Single-shot quenching involves heating the entire surface to be quenched simultaneously, then immersing the workpiece in a quenchant or spraying the quenchant over the entire heated surface. Travel quenching utilizes a small induction coil for localized heating. The coil moves relative to the heated surface, quenching immediately after heating. This method allows a small coil and relatively low power to heat a large surface within a single heating cycle. This article describes the basic types of quench coolers used in induction heating. Trempe par induction This article describes travel quenchers and water spray coolers. This article shows a flat-surface water spray cooler, This article shows a circular-surface water spray cooler. The induction coil, water cooler, and workpiece are arranged in a moving, scanning pattern to create an optimal heating/cooling cycle. The water jet angle of incidence is critical, requiring a 50° angle to ensure uniform cooling and a uniform hardened layer depth...
The principles for selecting steel for induction hardening are similar, but not identical, to those for steel hardened by other methods. The hardenability of ordinary carbon steel increases with increasing carbon content. For example, steel with a 0.2% carbon content, or 1020 steel, can only be hardened to HRc 48, while steel with a 0.45% carbon content, or 1045 steel, can be hardened to HRc 60. Adding alloying elements such as chromium, nickel, molybdenum, and tungsten can improve the hardenability of steel by shifting the ridge of the S-curve to the right. Induction hardened steel For example, during through hardening, ordinary carbon steel requires rapid cooling or quenching rates to avoid the ridge of the S-curve and prevent softening. Due to slow heat conduction and slow cooling, the inner layer beneath the surface hardened layer may soften due to incomplete martensitic transformation. Even during surface hardening, heat conducted from the center of the workpiece to the surface tends to slow the surface cooling rate, similar to the effect of forming a soft pearlite surface. Quenching with a quenchant more intense than oil often results in excessive deformation. Therefore, by adding a small amount of alloying elements, oil quenching can...
Principles of Metallurgy This article presents a simplified equilibrium diagram for low-carbon steel. Below 721°C, the normal structure of carbon steel with a carbon content of 0.3-0.83% is pure iron (ferrite) + pearlite (pearlite is a mixture of lamellar ferrite and cementite). If the temperature rises above 721°C (the so-called Ac line), cementite begins to dissolve into solid solution. Upon reaching the Ac line, the entire material transforms into austenite—a solid solution with a crystal structure completely different from that of the original ferrite. Rapid surface cooling to 350/200°C avoids the reformation of the original ferrite and pearlite, allowing for direct passage through the martensite phase. Rapid carbon precipitation from the remaining martensite results in interlocking crystals within a fine, hard structure, resulting in a hardened austenite. Very hard steel. This rapid cooling method is called quenching (see §3.2). For high-carbon steel (0.8-1.7% carbon), the amount of martensite crystals increases, making the steel harder. Such steels should not be heated all the way to the Acm line; instead, they should be heated to a lower temperature, such as the quenching temperature, and then cooled from this temperature. The required quenching heating temperatures are shown in this article. If quenching cooling...
Induction Steel Melting Furnace
Aluminum Induction Melting Furnace
Stainless Steel Induction Melting Furnace
Medium Frequency Gold Induction Melting Furnace
Small Medium Frequency Induction Furnace
Aluminum/Copper Ingot Continuous Casting Line
Please fill out the form below (required *), send us a short message, and we will contact you as soon as possible.
Send Message
Copyright © 2021 Luoyang Hongteng Electrical Equipment Co., Ltd.
