球墨铸铁井盖制作要求_四川井盖_四川井盖厂家_成都井盖厂
球墨铸铁井盖是球墨铸铁制品的一种。球墨铸铁经过球化和孕育处理得到球状石墨,有效提高了铸铁的力学性能,特别是塑性和韧性,从而获得比碳钢更高的强度。球墨铸铁是20世纪50年代发展起来的一种高强度铸铁材料,综合性能接近钢。基于其优异的性能,已成功用于铸造一些受力复杂,对强度、韧性、耐磨性要求高的零件。球墨铸铁已迅速发展成为仅次于灰铸铁的用途广泛的铸铁材料。所谓“以铁代钢”,主要是指球墨铸铁。
球墨铸铁井盖质量有保证,球墨铸铁强度高,韧性好,所以比同类型灰铸铁井盖轻30%左右。球墨铸铁的牌号为QT500-7,球墨铸铁井盖采用QT500-7。Qt 500表示抗拉强度为500MPA7,7表示伸长率。铁水出炉温度不低于1456℃。球化处理时,加入稀土硅铁镁合金,并选用低硫含量的焦炭,球化程度在三级以上。球墨铸铁井盖的特点:韧性好。详述了中碳钢的冲击值,是灰铸铁材料的10倍以上。耐腐蚀性强。喷水腐蚀试验表明,90天的腐蚀量仅为钢管的1/40,灰铸铁管的1/10。使用寿命是灰铁管的两倍,普通钢管的五倍。可塑性好。延伸率≥7%,和高碳钢差不多,灰铸铁材料延伸率为零。高强度。抗拉强度ób≥420MPa,屈服强度ós≥300MPa,与低碳钢相同,是灰铸铁材料的3倍。
在城市道路管理中,一般采用圆形井盖,因为圆形井盖不易倾斜,可以更好地保护行人和车辆的安全。使用圆形主要是因为圆形井盖通过其中心的每个直径长度都是相同的,这样如果井盖被过往车辆卷起,其直径会比下面的井口略宽,井盖就不会掉入井口。
(一)对化学成分要求严格,原铁水碳、硅含量高于灰铸铁,球墨铸铁中锰、磷、硫含量降低。
(2)铁水出钢温度高于灰铸铁,以弥补球化和孕育处理时铁水温度的损失。
(3)球化,即在铁水中加入球化剂。
(4)加入孕育剂进行孕育处理。
(5)球墨铸铁流动性差,收缩大,需要较高的浇注温度和较大的浇注系统尺寸,合理应用冒口和激冷铁,顺序凝固的原则。
(6)进行热处理
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井盖的类型有哪些?
井盖类型非常的多,像是上水井盖、污水井盖、雨水井盖、雨水箅子、电力井盖、路灯井盖、通信井盖、电信井盖、热力井盖、燃气井盖、电缆井盖、化粪池井盖等等。不同的井盖有不同的功能,上水井盖是供水用的井盖,下水井盖则主要是用来排除掉路面上的积水的。像湖南甄金井盖的类型,有不锈钢井盖、铸铁井盖、复合树脂井盖等类型,铸铁井盖中,球墨铸铁圆井和铸铁沟盖板使用的较多。因为路面上的车辆多,而球墨铸铁井盖的承压能力比较好,公路上使用的多的就是这类型井盖了,而且井盖的类型也多。
There are many types of well covers, such as water supply well covers, sewage well covers, rainwater well covers, rainwater grates, power well covers, street lamp well covers, communication well covers, telecommunications well covers, thermal well covers, gas well covers, cable well covers, septic tank well covers, and so on. Different manhole covers have different functions. The upper manhole cover is used for water supply, while the lower manhole cover is mainly used to remove water from the road surface. There are various types of manhole covers such as stainless steel manhole covers, cast iron manhole covers, and composite resin manhole covers. Among the cast iron manhole covers, ductile iron round wells and cast iron trench covers are more commonly used. “Because there are many vehicles on the road, and the pressure bearing capacity of ductile iron manhole covers is relatively good, this type of manhole cover is commonly used on highways, and there are many types of manhole covers.”
什么球墨铸铁井盖
球墨铸铁井盖是球墨铸铁产品的一种,球墨铸铁通过球化和孕育处理得到球状石墨,有效地提高了铸铁的机械性能,特别是提高了塑性和韧性,从而得到比碳钢还高的强度。球墨铸铁是20世纪五十年代发展起来的一种高强度铸铁材料,其综合性能接近于钢,正是基于其优异的性能,已成功地用于铸造一些受力复杂,强度、韧性、耐磨性要求较高的零件。球墨铸铁已迅速发展为仅次于灰铸铁的、应用十分广泛的铸铁材料。所谓“以铁代钢”,主要指球墨铸铁。
Ductile iron manhole covers are a type of ductile iron products. Spheroidal graphite is obtained from ductile iron through spheroidization and inoculation, effectively improving the mechanical properties of cast iron, especially its plasticity and toughness, resulting in higher strength than carbon steel. Ductile iron is a high-strength cast iron material developed in the 1950s. Its comprehensive performance is similar to that of steel. It is precisely based on its excellent performance that it has been successfully used to cast some parts with complex stress and high requirements for strength, toughness, and wear resistance. Ductile iron has rapidly developed into a widely used cast iron material, second only to gray iron. The so-called “replacing steel with iron” mainly refers to ductile iron.
什么是不锈钢井盖?
什么是高分子井盖?
“高分子井盖是采用不饱和聚脂树脂为基体的纤维增强热固性复合材料,用压制成型技术制成,是一种新型的环保型井盖。”
绿色环保:不生锈、绿色环保、节约不可再生资源。
防盗功能强:高分子井盖系复合材料具有不可再生性,不能回收利用,因而具有主动免被盗功能。
平衡能力好、承压力强:盖座咬合精度高,配合性好提高了道路的通行能力和行车舒适度。
日常维护简便、费用低:重量轻、防盗窃、寿命长、易识别,便于日常的开启和维护,有效降低了养护的劳动强度和更新费用的支出。