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新研制的气门表面强化材料不论用于汽油机或柴油机,目的是为了减少或排除合金中钴原素的含量以降低成本。 为了满足现代柴油机高速、高平均有效压力和高负荷的要求,需要对排气门和某些进气门工作表面进行强化处理。以确保足够的安全系数,满足机械负荷和热负荷的增加。以免在缺乏保护情况下出现失效（腐蚀、磨损和疲劳）。 多年来,STELLITE合金广泛地被用来作为气门表面熔敷材料。合金中主要成分是钴,七十年代以来由于钴的自然资源不稳定,于是新材料开发不能依赖于这种元素。同时,接焊这种材料的劳动强度和工艺质量的敏感性是显而己见的。因此,对于这两方面要求,需
The newly developed valve surface strengthening material for gasoline or diesel engine, the purpose is to reduce or eliminate the cobalt content of the alloy in order to reduce costs. In order to meet the high-speed, high average effective pressure and high load requirements of modern diesel engines, the exhaust valve and some intake valve work surfaces need to be strengthened. To ensure a sufficient safety factor to meet the increase of mechanical load and thermal load. To avoid failure (corrosion, wear and fatigue) in the absence of protection. Over the years, STELLITE alloys have been widely used as valve surface cladding materials. The main component of the alloy is cobalt, since the seventies due to the instability of natural resources of cobalt, so the development of new materials can not rely on this element. At the same time, the welding of this material labor intensity and process quality of the sensitivity is obvious. Therefore, for these two requirements, needs