铸造的品种和特色 当温度超越300-400℃(钢的蓝脆区)，到达700-800℃时，变铸造对金属坯料(不含板材)施加外力，使其发生塑性变形、改动尺度、形状及改进功能,用以制作机械零件、工件、工具或毛坯的成形加工办法。 铸造的品种和特色 当温度超越300-400℃(钢的蓝脆区)，到达700-800℃时，变形阻力将急剧减小，变形才能也得到很大改进。依据在不一样的温度区域进行的铸造，对于锻件质量和铸造技术需求的不一样，可分为冷锻、温锻、热锻三个成型温度区域。本来这种温度区域的区分并无严厉的边界，通常地讲，在有再结晶的温度区域的铸造叫热锻，不加热在室温下的铸造叫冷锻。

　　在低温铸造时，山东锻件加工的尺度变化很小。在700℃以下铸造，氧化皮形成少，并且表面无脱碳表象。因而，只需变形能在成形能范围内，冷锻简单得到极好的尺度精度和表面光洁度。只需控制好温度和光滑冷却，700℃以下的温锻也可以获得极好的精度。热锻时，因为变形能和变形阻力都很小，可以铸造形状复杂的大锻件。要得到高尺度精度的锻件，可在900-1000℃温度域内用热锻加工。别的，要注意改进热锻的工作环境。锻模寿数(热锻2-5千个，温锻1-2万个，冷锻2-5万个)与其它温度域的铸造比较是较短的，但它的自由度大，成本低。

　　坯料在冷锻时要发生变形和加工硬化，使锻模接受高的荷载，因而，需求运用高强度的锻模和采用避免磨损和粘结的硬质光滑膜处理办法。别的，为避免坯料裂纹，需求时进行中心退火以保证需求的变形才能。为保持杰出的光滑状况，可对坯料进行磷化处理。在用棒料和盘条进行连续加工时，当前对断面还不能作光滑处理，正在研究运用磷化光滑办法的可能。

　　济南泉西重型锻造有限公司18764458888成立于1996年是济南较大的锻件生产厂家之一,主营锻造,锻造加工,锻件厂.主要生产各种模具钢、工具钢高速钢、普碳钢坯及来料加工,最大单件生产量可达25吨.

　　中译英：When the temperature exceeds 300-400 degrees C (the blue and brittle zone of steel) and reaches 700-800 degrees C, the casting can make plastic deformation, change the scale, shape and improve function to make the forming process of mechanical parts, workpieces, tools or blanks. When the temperature exceeds 300-400 C (the blue and brittle zone of steel), the deformation resistance will be reduced sharply and the deformation can be greatly improved. According to the different temperature areas, the casting can be divided into three forming temperature regions, such as cold forging, warm forging and hot forging, for the difference between the quality of the forging and the demand of the casting technology. There is no strict boundary between this region of temperature. Generally speaking, the casting is called hot forging in the region of recrystallized temperature, and the casting that is not heated at room temperature is called cold forging.

　　In cryogenic casting, the dimension of forging is very small. Less than 700 degrees C, the oxide scale is less, and the surface has no decarburization. Therefore, only the deformation energy can be obtained in the forming energy range, and cold forging can achieve excellent scale accuracy and surface finish. We only need to control temperature and smooth cooling, and warm forging below 700 degrees can achieve excellent accuracy. When hot forging, because deformation energy and deformation resistance are very small, it can cast large forgings with complex shape. To obtain high precision forgings, hot forging can be done in the 900-1000 temperature range. In addition, we should pay attention to improving the working environment of hot forging. The number of forging dies (hot forging 2-5 thousand, warm forging 1-2 million, cold forging 2-5 million) is shorter than other casting in other temperature fields, but the degree of freedom is large and the cost is low.

　　When the blank should be deformed and hardened during cold forging to make the forging die accept high load, it is necessary to use high strength forging die and use hard smooth film treatment to avoid wear and bond. In addition, in order to avoid billet cracks, center annealing is needed to ensure the deformation of demand. In order to maintain excellent smoothness, billet can be phosphating. During continuous processing with rod and wire rod, the section can not be smoothed at present. The possibility of applying phosphating smoothing method is being studied.

　　Ji'nan Spring Heavy Forging Co., Ltd. 18764458888 was established in 1996 as one of the largest manufacturers of forgings in Ji'nan. The main forging, forging, forging and forging factories mainly produce all kinds of die steel, tool steel high speed steel, universal carbon billet and material processing, the maximum single piece production can reach 25 tons.