2results about How to "Optimize chemical composition" patented technology

This invention discloses a method for preparing rare-earth-containing guide materials for producing steel profiles. The chemical composition of the rare-earth-containing guide material, by weight percentage, is as follows: C 0.80–2.30%; Si 0.10–0.65%; Mn 0.85–2.50%; P ≤0.020%; S ≤0.025%; V ≤0.03%; Cr 0.65–1.35%; Mo 0.06–0.77%; RE content ≥0.0020%; and the remainder being Fe and unavoidable impurities. The preparation method includes steelmaking processes and ingot rolling processes. The purpose of this invention is to provide a method for preparing rare-earth-containing guide materials for producing steel profiles, and to smelt and prepare guide materials with good strength and toughness ratios and excellent wear resistance.

The application discloses a growth promoter for improving the seedling emergence rate of cotton in saline-alkali soil, and the salt resistance of cotton seed germination is improved by using rapeseed euricin regulator and GABA permeation regulator; the stable agent formed by strong acid materials such as urea phosphate can quickly reduce the pH value and saline-alkali of the soil tillage layer; meanwhile, the urea phosphate, amino acid, fulvic acid and auxiliary materials provide certain nutrient substances for seedling crops; the cooperation among raw materials fundamentally improves the salt tolerance of cotton seedling, not only improves the seedling emergence rate of cotton, but also can quickly reduce the pH value of saline-alkali soil in Xinjiang after dissolving water, improves the chemical composition of soil, reduces the salt content and alkalinity of soil, creates a good environment for crop growth, and after application, the soil salt content is below 20 g / kg, the pH value is below 7.5, the seedling emergence rate of cotton is above 70%, which is more than 30% higher than that of the control, and the yield of cotton in saline-alkali soil in Xinjiang is significantly increased, thereby providing technical support for rural revitalization.