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球墨铸铁井盖和灰铁铸件井盖的区分方法

来源:http://www.kpp647.com添加时间:2016-08-08 18:29:50

1、灰铁的石墨是平扁片状的,球铁的石墨是圆球状的。敲击球墨铸铁如发出近似敲击碳钢的声音,说明球墨铸铁球化不错。而灰铁敲击声音听起来,很闷。

1, the iron graphite is flat, flaky, ductile iron graphite is in the shape of a ball. Percussion graphite cast iron, such as the issue of carbon steel sound similar to the sound, that ductile iron. The percussion sounds very dull gray.

2、而灰铁井盖则是不添加任何辅助原料,将生铁直接冶炼成铁水,然后浇筑成井盖。但是球墨铸铁井盖则是要添加球化剂、稀土镁等其他金属合金而成的,所以现在市场上和有关部门要求用球墨铸铁井

2, is the gray iron manhole cover does not add any auxiliary materials, pig iron smelting directly into molten iron, then poured into the manhole cover. But ductile cast iron manhole cover is adding nodulizing agent, rare earth magnesium and other metal alloy to a, so now on the market and the relevant departments requirements for ductile cast iron well

盖。那是因为球墨铸铁井盖,在承载能力上远远超过了灰铁井盖。

Cover。 That is because ductile iron covers, in the bearing capacity is much more than the iron manhole cover。

3、关于球化率问题,可以这么说,同样是球墨铸铁的产品,球化率不同,那质量也就不同,价格上也有很大区别。一般工厂已球化率达到85%为合格产品。球化率85%以下的是因为铸造的时候,没有球

3, on the rate of the ball, it can be said that the same is the ductile iron products, the rate of different, that quality is different, there is a big difference between the price. General factory has reached 85% of the rate of qualified products. The rate of less than 85% is due to casting when there is no ball

化好而造成铁水温度低,制造出来的产品承载压力达不到要求。

And the temperature of the molten iron is low, and the production of the product can not meet the requirements.

4、球墨铸铁强度高、韧性好,因此球墨铸井盖比同类型灰口铸铁井盖轻30%左右。球墨铸铁牌号采用QT500-7,铁水出炉温度不低于1456℃,在球化处理时增配稀土硅铁镁合金和选用含硫量低的焦碳,

4, ductile cast iron, high strength, good toughness, so ductile iron covers than the same type of cast iron manhole cover light 30%. Using QT500-7 nodular cast iron grade, molten iron baked temperature not lower than 1456 DEG C, equipped with rare earth ferrosilicon magnesium alloy and selection of sulfur low spheroidizing treatment in coke.

球化级别达三级以上。

The level of the ball up to three or more.

5、从断口的外观可以简单区别球铁和灰铁,用肉眼观察,灰铁断口的晶粒比较粗大,为灰白色,晶面有金属光泽。球铁的断口晶粒很细小,为黑灰色,如果球化好的话几乎没有金属光泽,如果有发白的

5, from the appearance of the fracture can simply the difference between ductile iron and gray iron, observed with the naked eye, gray iron fracture of relatively coarse grain size, gray white, crystal face with metallic luster。 The grain fracture of ductile iron is very small, if the ball is gray black, good words almost no metallic luster, if there is white

光泽,一般情况是出现白口组织。

The general situation is shiny, white iron structure.

6、从冶炼方法来说,球铁是在冶炼时在灰铁中加孕育剂与球化剂使石墨由分散的团絮状变成球状,以减小对铁素体的割裂,增大强度,提到性能来达到的。

6, from the smelting method, ductile iron is in the smelting in gray iron with inoculant and spheroidizing agent make the graphite by dispersion of flocculent turn into a ball, to reduce the split of the ferrite, the strength increases, the mentioned properties to achieve the。

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This paper by Shandong ductile cast iron manhole covers to provide help, more relevant content please click: http://www.kpp647.com us the details for you to answer. Welcome your presence!



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