论文部分内容阅读
3.第二道环第二道环不仅要起密封作用,还要起刮油作用,它一般不带镀层,所用材料为片状石墨的灰铸铁,其基体的金相组织一般为珠光体,有时为经淬火和回火得到的针状索氏体。第二环铸铁的含磷量通常高于第一环,为0.3～0.6％。第二环常常采用锥面环,锥角α为30′～45′(见图3)。有时也采用带内倒角式内肩的扭曲环,在作功行程时,其作用相当于矩形环,而在其余行程其作用则相当于锥形环。
3. The second ring of the second ring not only to play a sealing role, but also from the oil scraping, it is generally without plating, the material used is flake graphite gray cast iron, the matrix metallurgical structure is generally pearlite, Sometimes obtained by quenching and tempering the sorbite. The second ring cast iron phosphorus content is usually higher than the first ring, 0.3 ~ 0.6%. The second ring is often used conical rings, cone angle α 30 ’~ 45’ (see Figure 3). Sometimes also use the chamfered inner shoulder twist ring, in the work trip, its role is equivalent to a rectangular ring, and its role in the rest of the trip is equivalent to a tapered ring.