Barrels are deep-drilled, a more expensive process, rather than hammer-forged. Fabarm says this creates less stress in the metal, and makes a better barrel. An interesting quirk is Fabarms actually seasons the barrel steel, analogous to seasoning stock wood. Solid side ribs join the barrels. But the crèm de la crèm of the Elos’ design is the Tribore system.Basically, this makes the entire barrel one long forcing cone. First, the cone itself is lengthened; then a conical section about eight inches long slowly reduces the bore diameter from about .736 at the rear to about .724 toward the muzzle. This is, of course, an application of the Venturi principle; reducing the diameter of a tube increases the velocity of a fluid (or in this case, shot) flowing through it.This design eliminates some of the disadvantages of an overbored barrel. This all ties in with the proof testing. All Elos B models receive the “normal” proof-test at the Italian National Proof House, but Fabarm requests an “over test” of an astounding 1,630 bars. This is a little over 23,600 psi, and about twice as high as SAAMI’s MAP for any 20- or 28-gauge shotshell.Read more: http://www.gundogmag.com/gear-accessories/fabarms-elos-b-al-review/#ixzz3Wwqe1h6M
Deep drilling technology:This stress is so high that few competitors are frozen cryogenically their tubes to reduce a little the tension…but the results are more marketing than concrete…There is a perfect solution to produce the best tubes: to drill solid bars of chrome molybdene steel.Because this technology is expensive , our two largest competitors are using it only on their high grade custom shop shotguns.To give better barrels to our clients FABARM uses only the deep drilling technology to produce all the tubes of all our shotguns
First, the chrome molybdenum barrel stock is seasoned for a full year. Exposure to the elements hardens the steel against warping and temperature expansion from high-volume shooting.Next, the steel is drilled three times to create the Baserri’s patented Tribore barrels. Mr. Thompson said that they have exceeded all others in the U.S. by testing to 1,630 BAR – the equivalent of 23,640 psi. For the sake of comparison, the Sporting Arms and Ammunition Manufacturing Institute set a minimum standard of 11,500 psi for 12-gauge shells in 2¾ and 3-inch lengths.
Ben de şöyle bir şey sorayım, silahlarda kullanılan çelikler başka nerelerde kullanılır? 4140, 4340 gibi çelikler başka hangi malzemelerin yapımında kullanılır?
Alıntı yapılan: HKN - 19 Haziran 2016, 15:30:35Ben de şöyle bir şey sorayım, silahlarda kullanılan çelikler başka nerelerde kullanılır? 4140, 4340 gibi çelikler başka hangi malzemelerin yapımında kullanılır?Otomobil ve uçak yapımında, krank mili, aks mili ve kovanı, yivli mil ve benzeri sünekliliği yüksek parçalar, ayrıca dişli ve çark yapımında kullanılır.
Eyvallah Osman Abi.Başka nereler var, başka başka? Buldum artık bırakmam peşini.
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