What’s Tungsten? Tungsten, also known as wolfram, is a chemical element with symbol W and atomic number 74. The word tungsten comes from the Swedish language tung sten directly translatable to heavy stone, though the name is volfram in Swedish to distinguish it from Scheelite, which in Swedish is alternatively named tungsten. A hard, rare metal under standard conditions when uncombined, tungsten is found naturally on Earth only in chemical compounds. It was identified as a new element in 1781, and first isolated as a metal in 1783. Its important ores include wolframite and scheelite. The fre... ...Read More>>

钨合金穿甲弹 钨合金穿甲弹是一种针对穿甲目标的弹药。19世纪60年代至20世纪50年代间，穿甲弹主要用于对付携带轻装甲的军舰。从20世纪20年代开始，穿甲弹用于对付坦克。 钨合金穿甲弹在穿甲的过程中，必须承受住与装甲板撞击时的超高撞击力。其弹头硬度高，形状为尖鼻状，弹壳内装有爆炸药。一些小口径的穿甲 弹，采用的是惰性炸药，由触发引信引爆，而不是采用高能爆炸药。由于当今的军舰很少使用装甲，所以钨合金穿甲弹很少用于海战中... ...Read More>>