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1972年,美国钢铁公司洛雷因(Lorain)工厂46英寸轧机的传动轴经历了一系列不明原因的机械性断裂事故。这些事故造成了维护、停产和更换设备等方面的巨大损失。 1948年建造的这台轧机,初期使用的是SAE1035锻钢联接轴。这些轴由4,000马力的电动机单独传动。每根轴长36英尺,直径19英寸,重约25吨,单根费用超过40,000美元。从1948年到1972年只有一根轴断裂,这是一个令人羡慕的记录。尤其可喜的情况是被轧制钢锭的单重从1948年的8
In 1972, the drive shaft of the 46-inch mill at the U.S. steel company Lorain experienced a series of unexplained mechanical breakdowns. These incidents caused huge losses in maintenance, outages and equipment replacement. The mill built in 1948 initially used a SAE1035 forged steel coupling. These shafts are individually driven by a 4,000-horsepower motor. Each axis is 36 feet long, 19 inches in diameter and weighs about 25 tons, with a single cost exceeding $ 40,000. From 1948 to 1972, only one axis ruptured, which is an enviable record. Particularly gratifying is the fact that rolled ingots are single weight from 1948 to 8