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本文报导了加锡铸铁制作汽缸体的试验工作。实验室工作和生产试验表明，在原有ＨＴ２０－４０牌号含铬的铁水中，附加 ０．０５％的锡，可使汽缸体缸筒内壁的珠光体数量提高到９０％以上，硬度有明显的提高，过冷层厚度减少，并且减少了汽缸体的断面敏感性，扩大了允许的化学成分范围，致密度和耐腐蚀性能也有所改善；同时也能满足机械加工的工艺要求。从而，可以显著地提高汽缸体的使用寿命。 文中指出，加锡对铸铁有孕育作用。从细化共晶团、改善断面均匀性、减少白口倾向、减少过冷石墨和提高机械性能几方面，与不加锡的铸铁进行对比，论证了锡的孕育作用。此外，还对汽缸体过冷层的形成以及加锡可使其减少的原因进行了探讨。
This paper reports the experimental work of the production of cylinder block with cast iron. Laboratory work and production tests show that the addition of 0.05% tin to the original HT20-40 grade chromium-containing hot metal can increase the amount of pearlite on the inner wall of the cylinder block cylinder to over 90% and significantly improve the hardness , The thickness of the overcooling layer is reduced, the section sensitivity of the cylinder block is reduced, the allowable chemical composition range is enlarged, the density and the corrosion resistance are also improved, and the technological requirement of machining is satisfied at the same time. Thus, the service life of the cylinder block can be significantly improved. The article pointed out that Canada tin cast iron has inoculation role. From the refinement of eutectic, improve cross-section uniformity, reduce the white mouth tendencies, reduce overcooling graphite and improve the mechanical properties of several aspects, compared with cast iron without tin, proves the tin inoculation. In addition, the formation of cylinder overcooling and the reasons why tin can be reduced are also discussed.