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为获得高机械性能的管坯和无缝钢管,顿涅茨冶金厂对30CrMnSiA进行了一系列的试验冶炼。研究了以下的试验方案:Ⅰ、Ⅱ、及Ⅲ方案是在钢包内分別加入2.0、3.0及4.0公斤/吨钢硅钙合金进行补充脱氧;Ⅳ方案是向中注管加入硅钙合金1.2公斤/吨钢。按此方法浇注两板钢锭,其余三板则按通常的工艺浇注。向钢包加入钙2—4公斤/吨提高了钢液的脱氧度,钢中酸溶铝的含量证实了这一点。这样,随着硅钙加入量从2.0公斤/吨增到4.0公斤/吨,钢中酸溶铝的含量增
In order to obtain high mechanical properties of the tube and seamless pipe, the Donets Metallurgical Metallurgical 30CrMnSiA conducted a series of pilot smelting. The following test program was studied: Ⅰ, Ⅱ, and Ⅲ programs are added 2.0, 3.0 and 4.0 kg / ton of steel calcium-calcium alloy in the ladle to replenish deoxidation; Ⅳ scheme is to add a tube of calcium and silicon alloy 1.2 kg / Tons of steel. According to this method pouring two plates ingot, the other three plates are cast according to the usual process. Adding 2-4 kg / t of calcium to the ladle increases the degree of deoxidation of the molten steel, as evidenced by the content of acid-soluble aluminum in the steel. In this way, with the amount of calcium silicate increased from 2.0 kg / tonne to 4.0 kg / tonne, the content of acid-soluble aluminum in steel increased