Additional protective gear will be provided as needed. Nylon, polyester, spandex, or other synthetics are not allowed around machines, equipment, or processes that can produce hot fragments, sparks, or flames. Arrive for class in all-natural fiber clothing (100% cotton), long pants, and closed-toe, closed-heel shoes with socks that protect up to the ankle. What to wear: At RMM, you must dress safely and appropriately. Please read carefully the disclaimers and guidelines Prerequisites: Recommended to take "Learn to Forge nails" firstĪge: there are no age restrictions to the class. In this class more techniques for blade smithing will be covered, including various heat treatments, tapering, and tempering methods used to maximize strength with durability.Ībout the Instructor: Classes taught by Kenneth of Fire & Brimstone Forge A balance is needed between the soft flexible metal and the hard brittle metal to achieve a knife that will hold an edge without breaking. The metal will then posses both features of a durable and hard metal that is ideal for knives.Īs far as knives are concerned, the harder the steel, the better the edge, however, the harder edge makes for a brittle knife. Students will utilize a high carbon railroad spike and learn methods that induce carbon into the metal while also learning how to temper in a process called normalization. This is the perfect class to learn one of the basics of knives-making: balancing durability and hardness of the metal to make the perfect blade! The finished spikes shall conform to the dimensions specified by the purchaser, subject to the permissible variations specified in Table 2-1.Īll finished spiked shall be straight, with well formed heads, sharp points and be free from injurious defects and shall be finished in a workmanlike manner.Learn how to forge a knife out of a railroad spike If the spikes fail to meet the third test, they shall be rejected.Ģ.2.9 PERMISSIBLE VARIATIONS IN DIMENSIONS (1968) Spikes represented by bend tests failing to meet the requirements prescribed in Article 2.2.6a and Article 2.2.6b may be annealed and resubmitted. One bend test of each kind specified in Article 2.2.6a and Article 2.2.6b shall be made from each lot of 5 tons or fraction thereof.ĥ-2-6 AREMA Manual for Railway Engineering When the option in Article 2.2.5 is exercised, one tension test shall be made from each 10-ton lot or fraction thereof.ī. But no, it won't get as hard as another bit of steel with 30 points.Ī. Or look in chapter 6 of Principles of Heat Treatment of Steel by Krauss for a very good graph.Ī spike or other bit of steel with 20 points of carbon can indeed be hardened. Retained austenite can actually diminish maximum attainable hardness at carbon levels beyond this.) Run an internet image search with the terms "carbon" and "hardness" and a few renditions of this graph will show up. Maximum attainable hardness levels out around 60 or 65 points. The more carbon available, the more martensite which can be formed. The maximum attainable hardness of a given piece of steel versus the carbon content forms a curve on the graph. There is no magic number above which steel will harden or below which it will not. No disrespect meant to a fellow electrician, but I'm going to get nitpicky here. No you cant HT a spike, sorry read about heat treating and you will understand that one needs at least 35 points of carbon to harden a steel
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