![]() ![]() ![]() 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. Beginner Knife Making: Forging A railroad spike Seax and Tanto. It was made to hold RR track to the ties, and. Remember it was a large Nail, it never wanted to be a knife. The cost for scrap at 40 cents a pound is not that far from the 4 per pound of buying real knife steels when one looks at how much metal it really takes to make a knife, or steel an edge. If the spikes fail to meet the third test, they shall be rejected.Ģ.2.9 PERMISSIBLE VARIATIONS IN DIMENSIONS (1968) Same as getting a RR spike to hold a good edge. The next blow will force it completely into the concavity of the railroad spike jig. The blade is almost resting at the bottom of the jig. Note the air between the billet and the spike. 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. Place the bar on its spine, with the choil and cutting edge looking up and the point at the groove. 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. On the last cycle the blade is quickly quenched leading edge down tip point north (for what ever difference that makes) in a stiring fasion in 30 weight ND motor oil. The more carbon available, the more martensite which can be formed. With a torch using the Bill Moran method of heat treating, I thermal cycle the leading edge of the blades three times allow to air cool until the 'shadow' moves thru the blade. 1 Member of several sporting clubs Hunted several 1 a friend makes knivies out of railroad spikes,and boy are they hard and hold a edge, a bit butt heavy. 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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