{"id":19900,"date":"2020-06-28T02:32:18","date_gmt":"2020-06-28T02:32:18","guid":{"rendered":"https:\/\/www.meetyoucarbide.com\/?p=19900"},"modified":"2020-06-28T02:32:21","modified_gmt":"2020-06-28T02:32:21","slug":"analysis-of-crack-in-steel-casting","status":"publish","type":"post","link":"https:\/\/www.meetyoucarbide.com\/tr\/analysis-of-crack-in-steel-casting\/","title":{"rendered":"Analysis of Crack in Steel Casting"},"content":{"rendered":"
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Inclusions in molten steel during smelting are one of the important reasons for cracks in steel castings. In order to reduce inclusions in molten steel, the smelting operations of deoxidization, desulfuration, impurity removal and degassing should be strengthened in the smelting process, and necessary measures should be taken in the ladle behind the furnace, such as adding rare earth to modify the shape of inclusions, so as to reduce the existence of inclusions and eliminate the cracks of steel castings better.<\/p>\n\n\n\n
1. Types and causes of inclusions in steel<\/h2>\n\n\n\n
Inclusions in steel mainly refer to non-metallic inclusions in steel. It is generally believed that non-metallic inclusions in steel usually exist in the following forms: oxides: F EO, Fe2O3, m no, Al2O3, SiO2, MgO, etc.; sulfides: m ns, FES, etc.; silicates: fesio 4, m nsio 4, FeO \u00b7 a L2O3 \u00b7 SiO2, etc.; nitrides: AlN, Si3N4, etc.<\/p>\n\n\n\n
The non-metallic inclusions in steel come from two aspects: one is generated along with the smelting process, namely, deoxidizing products of ferroalloy are added during tapping and secondary oxidation products of molten steel and air during pouring, which are called endogenous inclusions, which are generally small particles and evenly distributed in steel; the other is brought in from outside for various reasons, which are called foreign inclusions, This kind of inclusions are mostly irregular in shape, large in size and uneven in distribution, which is the main cause of cracks and is harmful to steel.<\/p>\n\n\n\n