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IM体育App下载-球墨铸铁在阀门材料中的优势分析

2021-10-05 09:22:39 浏览: 589次 作者:IM体育App下载
作为钢的替换品,1949年人类开辟了球墨铸铁。铸钢含碳量少在0.3%,而铸铁和球墨铸铁含炭量量则最少为3%。铸钢中的低含碳量使得作为游离石墨存在的碳不会构成布局薄片。铸铁内的碳自然情势是游离石墨薄片情势。在球墨铸铁内,这类石墨薄片经由过程非凡的处置方式转变成细小的球体。这类改良后的球体使得使得球墨铸铁比铸铁和钢比拟具有加倍优良的物理机能。恰是这类碳的球状微不雅布局,使得球墨铸铁具有加倍杰出的展延性和抗冲击性,而铸铁内部的薄片情势致使铸铁没有展延性。经由过程铁素体基体可取得最好的展延性,是以,球墨铸铁的压力负载部件都颠末铁素体化退火周期的工艺处置后,球墨铸铁内部的球状布局也可以或许消弭铸铁内部的薄片石墨轻易发生的裂痕现象。在球墨铸铁的微不雅照片中,可以看见裂痕游行到石墨球后终止。在球墨铸铁行业内,这些石墨球称为“裂痕终结者”,由于它们具有禁止断裂的能力。

  As a substitute for steel in 1949, the human development of ductile cast iron. Less than 0.3% carbon steel, while the cast iron and ductile iron with carbon content the amount of at least 3%. Low carbon steel makes as free graphite carbon sheet structure will not form. The natural form of carbon in cast iron is the free graphite flake form. In ductile iron, the graphite flakes change through special processing methods into a tiny ball. The improved ball made of cast iron makes has physical properties greater than cast iron and steel. It is this nodular microstructure of carbon, the nodular cast iron has better extension and impact resistance, while the flake form of cast iron results no ductility. To obtain the best ductility, the ferrite matrix therefore, ductile iron pressure containing parts are treated with a ferritizing annealing cycle, ductile iron spheroidal nodules also eliminate the crack phenomenon of flake graphite cast iron internal prone. In microscopic photos of ductile iron, can see the cracks in the procession to the ball after the termination of graphite. In the ductile iron industry, the graphite ball called “ crack terminator ”, because of their ability to prevent breakage.

  与铸铁比拟,球墨铸铁在强度方面具有绝对的优势。球墨铸铁的抗拉强度是60k,而铸铁的抗拉强度只有31k。球墨铸铁的屈就强度是40k,而铸铁并没有显示出屈就强度,而且终究呈现断裂。球墨铸铁的强度-本钱比远远优在铸铁。

  Compared with cast iron, ductile iron has the absolute advantage in strength. Tensile strength of cast iron is 60K, while the tensile strength of cast iron is only 31k. The yield strength of ductile iron is 40K, and the iron did not show the yield strength, and ultimate fracture. Ductile iron strength-to-cost ratio is much better than that of cast iron.

  球墨铸铁的强度和铸钢的强度是可比的。球墨铸铁具有更高的屈就强度,其屈就强度最低为40k,而铸钢的屈就强度只有36k。在年夜部门市政利用范畴,如:水、盐水、蒸汽等,球墨铸铁的耐侵蚀性和抗氧化性都跨越铸钢。因为球墨铸铁的球状石墨微不雅布局,在削弱振动能力方面,球墨铸铁优在铸钢,是以加倍有益在下降应力。选择球墨铸铁的一个主要的缘由在在球墨铸铁比铸钢本钱低。球墨铸铁的低本钱使得这类材料加倍受接待,锻造效力更高,也较少了球墨铸铁的机加工本钱。

  The strength of ductile iron and steel strength is comparable. Ductile iron has a higher yield strength, yield strength minimum of 40K, while the yield strength of steel is only 36k. In most municipal applications, such as: water, salt water, steam, ductile iron corrosion and oxidation resistance than cast steel. As the spherical graphite cast iron microstructure, the decrease vibration capability, ductile iron better than steel, therefore more conducive to reducing stress. Choose one of the important reasons of ductile cast iron is ductile iron casting low cost ratio. The low cost of nodular cast iron makes the material more popular, casting more efficient, less the cost of machining ductile cast iron.

本文题目:球墨铸铁在阀门材猜中的优势阐发 本文地址:http://www.hqfmjt.com/company-news/207.html
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