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中厚板工艺流程谁了解

中厚板工艺流程谁了解

浏览：42次 | 提问时间： 08-10 04:27

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倾尽所有换你心 08-10 04:28

中厚板工艺流程中厚板热处理工艺是由加热、保温和冷却三个阶段组成。根据不同的目的可采用不同的加热温度和冷却速度。中厚板热处理常用的有正火、退火及调质三种工艺。中厚板热处理的目的是为了生产具有高抗拉强度、高屈服点、耐冲击、耐腐蚀、耐磨等性能的调质板材。

麋鹿与林 08-10 04:36

中厚板的生产流程通常为配合控制轧制，采用低温出炉的加热制度，可节省*消耗。轧制工艺分三个阶段:①成形轧制，消除板坯表面的影响和提高宽度控制的精度，沿板坯长度方向或斜向进行1~4道轧制。把坯料轧至所要求的厚度。②展宽轧制，这是中厚板不同于其他种类板材轧制的重要工序。为达到轧制成品规格所要求的宽度，板坯转90°、沿板宽方向轧制。③精轧，展宽轧制后再转90°，转回原坯料长度方向，轧制到成品板厚度。妥善制定中厚板轧制工艺能提高轧机的生产能力、钢板的质量和成材率。要确保钢板的平直度，除采取各种保证板形的措施外，对厚度40mm以下的钢板每块均需经过热矫直，对不平直的冷钢板进行冷矫直。为冷剪切成品板，钢板要冷至 150℃以下，冷却要均匀，冷却速度应适宜;自从采用滚切式剪机剪切后，基本上解决了剪弯缺陷问题;调整剪刃间隙可以大大提高钢板剪切断面的质量。根据钢板质量要求，用超声波进行不同深度的探伤，对焊管用板的四个板边要全面进行探伤。热处理时除了保证板的机械性能外，还要保证板形良好。抛丸涂层法多用于生产造船和桥梁用板，抛丸去除氧化铁皮后，再涂层防锈，涂层后应快干。钢板表面尺寸形状的检查主要靠人工进行，打印标记工序已实现机械化，并可由计算机控制*作。

钟情你 08-10 04:44

1、原料选择原料是中厚板生产中的重要环节之一。原料的选择是否合理，将影响轧机的生产率、成材率、钢板质量及成本。原料表面缺陷一般可以采用表面清理的方法消除，然后再加热、轧制，否则会因原料缺陷在轧制过程中扩展造成废品。连铸坯常见缺陷有：表面裂纹、内部裂纹、皮下气孔和夹杂、非夹杂、中心偏析、中心疏松、重皮、划伤、凹坑等。原料表面的缺陷除一些比较轻微的在加热过程中被氧化掉不会影响钢板质量外，尺寸超过一定限度的缺陷都需要采用某种清理方法将其清除掉，以免影响钢板质量而造成废品。表面质量清理不仅能改善钢板表面质量，而且能减少废品，节约金属和降成本。中厚板分厂采用*清理方法，按Q/WG（LG）202标准，对板坯进行认真检查和缺陷清理。 2、加热（1）在热轧中厚板前，必须将板坯加热到一定温度，使其具有一定的可塑性后再进行轧制。（2）加热的目的：钢的加热目的：提高钢的塑性。降低变形抗力，以便于轧制。影响金属塑性的因素有如下两种：（1）塑性受钢的内在因素影响、化学成分、组织结构、非金属夹杂物；（2）塑性受轧钢时的外部条件影响：变形温度；变形速度；应力状态及加热介子。（3）加热时，分预热、加热、均热三个阶段。预热段主要是减小钢坯的热应力和利用炉气温度来预热钢坯；加热段是加热钢坯的主要地方，即快速将钢坯加热到工艺要求的温度，加热段温度的高低对产量和质量有极大的影响；均热段有二个目的，一是使钢坯获得较小断面温差，二是有利于提高炉子单位生产率。（4）加热工艺：加热工艺包括加热温度（加热温度、均热温度）、加热速度、加热时间、炉温制度及炉内气氛。3、轧制中厚板轧制过程分四个阶段：（1）除鳞阶段：除尽轧件表面上的氧化铁皮，以保证获得优良的钢板表面质量。（2）宽展阶段：根据坯料的尺寸和对性能的要求，确定轧制方式，解决坯料与成品在宽度上的差异，确保钢板在宽度上达到规定的要求。（3）轧长阶段：给予轧件大的压下量，使轧件迅速轧长，为下阶段轧制创造条件。（4）精确度控制阶段：根据产品要求，对钢板进行厚度精度控制，板形控制，性能控制。第1 、2阶段为立辊轧机和二辊轧机上完成，第3、4阶段为四辊轧机上完成。

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