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河北亿安精密铸造有限公司
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地址:河北省沧州市献县城东工业区
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玛钢扣件材质的重要性

2017-02-15

建筑钢管扣件是什么材质? 建筑钢管扣件是什么材料?建筑扣件材质为玛钢铸铁材质,此材质的优点是柔韧性好,不易断,成本低,可反复使用。
建筑扣件使用中存在的不安全因素为:①扣件来源杂乱,质量不均,特
别是有价格很低的劣质扣件进入施工现场;②旧扣件的螺栓有滑丝,但仍勉强使用。建筑扣件有钢板冲压的和可锻铸铁的。用于搭设模板支撑架的扣件为可锻铸铁扣件,材料为机械性能不低于KTH33008的可锻铸铁,其机械性能:抗拉强度330N/mm,延伸率8%,硬度HB120~163。可锻铸铁是由一定成分的白口铸铁经石墨化退火而成,比灰口铸铁具有较高的韧性,多用于制造成承受冲击荷载的铸件。建筑扣件检测的基本要求如下:①新扣件必须有产品质量合格证、生产许可证、专业检测单位的测试报告;②扣件螺栓拧紧力矩达70N·m时,可锻铸件扣件不得破坏。  
国内常用的建筑扣件是铸铁制作,其机械性能应符合《钢管脚手架扣件》(GB15831-2006)材质不低于KT330-08.而目前市场上扣件品种鱼龙混杂、质量参差不齐,有的厂家使用灰口铸铁、地槽钢来制作扣件,其机械性能难以满足要求不按照国家标准生产。
扣件是连接钢轨和轨枕的中间联结零件。其作用是将钢轨固定在轨枕上,保持轨距和阻止钢轨相对于轨枕的纵横向移动。在混凝土轨枕的轨道上,由于混凝土轨枕的弹性较差,扣件还需提供足够的弹性。
扣件必须具有足够的强度,耐久性,和一定的弹性,并有效第保持钢轨与轨枕之间的可靠联结。此外,还要求扣件系统零件少,安装简单,便于拆卸。

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