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有的老师傅说:“热加工人在大干,定叫钢铁组织变。它的变化有规律:和热按着平衡图,却按着C曲线。”这话是很有道理的。一冷却有“学问”钢在热加工时,必须有加热、保温及冷却的过程。将钢从一定的较高温度,随着时间的推移,降到室温(或某一较低温度),这就是冷却。简单说来,冷却就是钢本身温度的降低过程。钢在热加工后的冷却方法是不一样的。就拿锻轧后坯料的冷却来说,有的在砂(或灰)坑中冷,有的在空气中冷,还有的在炉中冷。而热处理工件的冷却方法就更多了。归根结底,还是一个冷却快与慢的问题。衡量冷却快慢,用冷却逮度(V)来标志。冷却速度是指工件在单位时
Some old masters said: “The hot workman is doing a great job, and he calls it a steel organization, and it has a regular pattern of change: press the balance graph with the heat, and press the C-curve.” A cooling of “learning” steel in the thermal processing, there must be heating, insulation and cooling process. The steel from a certain higher temperature, over time, down to room temperature (or a lower temperature), which is cooling. In short, cooling is the temperature reduction of the steel itself. Steel cooling after hot processing is not the same. As for the cooling of blank after rolling, some are cold in the sand (or ash) pit, some are cold in the air, and others are cold in the furnace. The heat treatment of the workpiece cooling method even more. After all, it’s still a matter of fast and slow cooling. Measure the cooling rate, with the cooling rate (V) to mark. Cooling rate refers to the workpiece in the unit