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曲轴是发动机的关键部件,它的损伤,直接影响发动机的寿命,为了修复那些已被损伤的曲轴,人们采取了很多方法:比如热喷涂、镀铬、电弧焊。以上方法在实际修复中,各有所长,但修复后的质量与原轴质量相比,相差比较大。比如热喷涂,它的特点:机械结合喷涂层(不是冶金结合),容易造成二次烧瓦现象,轴颈表面硬度和耐磨度与原轴相比,相差比较大。
Crankshaft is a key part of the engine, its damage, directly affect the life of the engine, in order to repair those who have been damaged crankshaft, people have taken many ways: such as thermal spraying, chrome, arc welding. The above method in the actual repair, each have their own strengths, but the quality of the original repair compared with the original axis, the difference is relatively large. Such as thermal spraying, its features: mechanical spray coating (not metallurgical bonding), easily lead to the phenomenon of secondary burning, journal surface hardness and wear resistance compared with the original axis, the difference is relatively large.