A kind of corrosion-resistant casting high-carbon steel and preparation method thereof

Abstract

The invention discloses corrosion-resistant cast high-carbon steel and a preparation method thereof. The cast high-carbon steel comprises the following chemical components in percentage by weight: 0.8-1.2 percent of carbon, 1.2-1.6 percent of silicon, 0.5-0.8 percent of manganese, 1.5-1.8 percent of copper, 0.3-0.5 percent of titanium, 0.15-0.18 percent of aluminum, 0.08-0.15 percent of boron, 0.1-0.3 percent of Mo, 0.10-0.20 percent of N, less than or equal to 0.02 percent of P, less than or equal to 0.02 percent of S and the balance of Fe. The preparation method comprises the following steps: (1) smelting; (2) sequentially adding 1.6-1.8 mass percent of metal aluminum, 1.2-1.5 mass percent of ferrosilicon, 0.1-0.3 mass percent of ferroboron, 0.2-0.5 mass percent of ferrotitanium and 0.8-1.5 mass percent of ferromanganese based on molten steel into the molten steel when the temperature of the molten steel is 1500-1550 DEG C, heating the molten steel to the temperature of 1600-1650 DEG C, preserving the temperature for 2-3 hours, discharging, and injecting the molten steel into a casting ladle; (3) performing microalloying treatment; (4) slagging off and pouring into a casting mold; and (5) performing heat treatment. According to the reasonable arrangement of the ratio and preparation process, the formed cast high-carbon steel has the advantages of extremely high strength, high hardness, high atmospheric corrosion resistance and high high-temperature corrosion resistance.

Description

technical field [0001] The invention relates to the technical field of cast steel, in particular to a corrosion-resistant cast high-carbon steel and a preparation method thereof. Background technique [0002] Cast steel is a general term for iron-based alloys used to produce castings that do not undergo eutectic transformation during solidification, and is a type of casting alloy. Cast steel is an alloy with iron and carbon as the main elements, and the carbon content is 0-2%. So far, cast steel is divided into three categories: cast carbon steel, cast low alloy steel and cast special steel. [0003] Cast carbon steel is cast steel in which carbon is the main alloying element and contains a small amount of other elements. Cast steel with a carbon content of less than 0.2% is cast low-carbon steel; For cast high carbon steel, as the carbon content increases, the strength and hardness of cast carbon steel increase. Cast carbon steel has high strength, plasticity and toughne...

AI Technical Summary

Problems solved by technology

However, due to the diversification of outdoor environments, cast steel materials also have certain requirements for acid and alkali corrosion resistance, and the current cast high carbon steel cannot meet the standards for practical applications