论文部分内容阅读
火焰喷焊镍基自溶合金涂层,具有优异的耐磨耐蚀等性能,越来越多地应用于柱塞、活塞杆、密封环等零部件进行表面强化,取得了显著的技术经济效益。如石油部门用“酸化压裂车柱塞泵”的柱塞,采用火焰喷焊Ni60镍基自溶合金,其使用寿命比原用35CrMo钢柱塞的寿命提高近五十倍,效果十分突出。然而,正是由于镍基合金焊层高温硬度高,导热性差、强度和韧性好等特点,给这种涂层的磨削加工造成很大的困难:磨削比低,磨削效率低,砂轮容易堵塞,需要经常修整,砂轮消耗大,磨削时容易产生振动和啸叫声,导致工件表面出现波纹,表面粗糙度差等。针对上述问题,研制成新的金刚石砂轮和磨削工艺,成功地解决了难磨镍基合金喷焊层的磨削加工问题。
Flame spray nickel-based self-dissolving alloy coating, with excellent wear resistance and corrosion resistance, more and more used in piston, piston rod, seal ring and other components for surface strengthening, and achieved significant technical and economic benefits . Such as the oil department with “acid fracturing truck piston pump” plunger, flame spray welding Ni60 nickel-based self-dissolving alloy, the service life of 35CrMo steel plunger than the original life expectancy increased by nearly 50 times, the effect is very prominent. However, it is due to the high hardness and poor thermal conductivity of nickel-based alloy welding layer, strength and toughness, etc., to the coating grinding caused great difficulties: low grinding ratio, low grinding efficiency, grinding wheel Easy to block, you need regular dressing, grinding wheel consumption, easy to produce vibration and whistling when grinding, resulting in the workpiece surface ripple, poor surface roughness. In response to the above problems, developed a new diamond grinding wheel and grinding process, successfully solved the hard grinding nickel-based alloy spray coating grinding problems.