论文部分内容阅读
采用焊丝气焊接长细长钻头工艺在工厂车间里使用已经相当普遍,但它存在着许多缺点。由于高速钢钻头的化学成份除了铁、碳以外,还有铬、钨、钒、钼、镍等元素,且含碳量较高,所以采用丝焊焊接后接头处容易产生金属过热、烧伤、夹渣等缺陷,影响了长钻头的结合力,导致使用时在接口处容易产生脆裂折断。这里介绍一种用氧、乙炔焰喷焊对接3～8mm细长钻头的加工工艺方法。将一根45钢棒料车削至相应尺寸,并车削20°～28°焊接坡口与普通钻头(同样磨削坡口为20°～28°)用氧、乙炔火焰喷焊碰接。先将
The use of wire welding long slender drill process in the factory floor has been quite common, but it has many shortcomings. As the chemical composition of high-speed steel drill bit in addition to iron, carbon, there are chromium, tungsten, vanadium, molybdenum, nickel and other elements, and a high carbon content, so the use of wire joints after welding prone to metal overheating, burns, clips Slag and other defects, affecting the binding force of long drill, resulting in the use of easy to produce at the interface brittle fracture. Described here with a oxygen, acetylene flame spray butt slender drill 3 ~ 8mm processing methods. A 45 steel bar turned to the appropriate size and turning 20 ° ~ 28 ° welding bevel and ordinary drill bit (the same grinding bevel 20 ° ~ 28 °) with oxygen, acetylene flame spray welding. First