导言远在五十年前由于实驗及生产經驗的累积,对于黑心可鍛鑄鉄的生产已經揭穿了其全部秘密,並且可以稳定地获得合于要求的鑄件。但是在厚断面鑄胚的生产及进一步縮短退火周期的两个問題上,到目前为止,仍然是可鍛鑄鉄生产的基本問題。增大鑄件壁厚(至100公厘或100公厘以上)使其在鑄态不产生麻口,是一个鑄态石墨化問題,也就 Introduction Fifty years ago, due to the accumulation of experimental and production experience, the production of black malleable castings has revealed all its secrets and made it possible to stably obtain the desired castings. However, so far the production of heavy cross-section cast embryos and the further shortening of the annealing cycle are still the basic problems in the production of malleable castings. Increasing the wall thickness of the castings (up to 100 mm or 100 mm) does not create hemp in the as-cast form and is an as-cast graphitization problem