75results about How to "Inclusion oxide reduction" patented technology

The invention discloses a highly-wear-resistant alloy steel material used for pump trucks. The alloy steel material comprises following chemical elements by weight: 0.2-0.4% of carbon, 1.4-1.7% of silicon, 4.2-4.4% of manganese, 1.7-2.1% of chromium, 0.4-0.7% of molybdenum, 0.1-0.3% of aluminum, 0.3-0.5% of boron, 0.5-0.8% of titanium, 0.04-0.07% of La, S not more than 0.04% and P not more than 0.04%, with the balance being iron. The alloy steel has high hardness, good wear resistance, high toughness, good plasticity, good corrosion resistance and long service lifetime, and is suitable for working in highly-wearing environments such as pump truck tank bodies, delivery pipes, and the like. A portion of waste iron is used as a raw material of the alloy steel material and a secondary refining process is performed so that the quality of the alloy steel material is stable and uniform. A refining agent provided by the invention is used for casting production and is capable of increasing the rate of finished products, reducing the porosity degree in castings by 1-2 degrees, avoiding air hole generation on casting surfaces and reducing significantly oxide inclusion which is about at the 2 level.

The invention discloses a high-temperature resistant and wear-resistant alloy steel lining plate material which comprises the following chemical elements in percentage by mass: 0.2-0.4% of carbon, 0.2-0.4% of silicon, 3.5-3.7% of manganese, 0.7-0.9% of chromium, 0.8-1.1% of molybdenum, 1.2-1.4% of vanadium, 0.1-0.15% of lanthanum, 0.04-0.07% of Nb, less than or equal to 0.04% of S, less than or equal to 0.04% of P and the balance of iron. In the lining plate provided by the invention, the alloy steel obtained by adding the elements such as lanthanum, molybdenum and niobium into low-carbon steel has the advantages of high hardness, high strength, good wear resistance, high-temperature resistance, good toughness, good plasticity, corrosion resistance and high cost performance. In the lining plate material disclosed by the invention, the waste iron is partially used as the raw material, secondary refining is performed, the thermal treatment temperature after casting is reasonably controlled, the raw material is fed in batches, and the comprehensive mechanical properties are improved. A refining agent is applied to the casting production; and in a casting, the porosity is reduced by 1-2 degrees, and the oxide inclusion is at about level 2.

The invention relates to a high-hardness alloy steel material which contains the following chemical components in percentage by mass: 3.5-3.7% of carbon, 1.1-1.3% of silicon, 7.0-7.2% of manganese, 0.02-0.05% of molybdenum, 1.6-1.8% of copper, 2.4-2.6% of nickel, 0.006-0.009% of vanadium, at most 0.030% of P, at most 0.030% of S and the balance of iron. By using the raw material combination of the manganese, nickel, molybdenum and the like, the proportion, production technique and feed sequence are reasonably arranged, so the formed alloy material has favorable comprehensive mechanical properties, especially has very high strength and high hardness and has the advantages of excellent abrasion resistance, excellent corrosion resistance and excellent heat resistance. Part of scrap iron is used as the raw material, thereby enhancing the quality stability and uniformity of the alloy. The material is suitable for tools, cutters and the like. The refining agent is added to lower the porosity by 1-2 degrees.

The invention relates to an aluminum-silicon-magnesium cast aluminum alloy for a radiator of an air-conditioner. The aluminum alloy is characterized by comprising the following components: on the basis of weight percentage, 9.5 to 10.5 of Si, 3.40 to 3.60 of Mg, 0.60 to 0.80 of Ti, 0.04 to 0.06 of Sr, 0.08 to 0.12 of Hf, 0.5 to 0.8 of Bi, 0.8 to 1.1 of Ni, 0.2 to 0.3 of Sn, 0.16 to 0.19 of Zr, 0.12 to 0.14 of Li and 0.06 to 0.08 of Ba, with the balance being Al. The aluminum alloy provided by the invention overcomes the problems of low strength and elongation percentage of an aluminum-silicon alloy and poor casting performance and corrosion resistance of an aluminum-copper alloy and an aluminum-zinc alloy and has the advantages of improved tensile strength, toughness and casting performance, low cost, good corrosion resistance and good thermal conductivity.

The invention discloses an antimony-containing highly-wear-resistant alloy steel material used for pump valves. The alloy steel material comprises following chemical elements by weight: 0.3-0.45% of carbon, 0.7-0.85% of silicon, 1.1-1.4% of manganese, 2.7-2.9% of chromium, 0.3-0.5% of boron, 0.12-0.15% of cerium, 0.5-0.8% of As, 0.02-0.04% of Sb, S not less than 0.04% and P not less than 0.04%, with the balance being iron. By adoption of combination of the antimony, the boron, the cerium, and other elements, the alloy steel obtained has high hardness, good wear resistance, good toughness and good corrosion resistance, is suitable for working in highly-wearing environments, such as pump truck tank bodies, delivery pipes, bearings, pump shafts, and the like, and has service lifetime two times longer than a common material. A portion of waste iron is used as a raw material of the alloy steel material and a secondary refining process is performed so that the quality of the alloy steel material is stable and uniform. A refining agent provided by the invention is used for casting production. The porosity degree in castings is reduced by 1-2 degrees. Oxide inclusion is at about the 2 level.

The invention discloses a high chrome alloy steel material and a preparation method thereof. The high chrome alloy steel material contains the following chemical elements by mass percent: 2.6-2.8% of carbon, 11.3-12.5% of chrome, 0.1-0.3% of nickel, 0.3-0.5% of manganese, 0.04-0.06% of molybdenum, 0.3-0.5% of vanadium, 0.005-0.006% of titanium, 0.7-0.8% of copper, not more than 0.03% of P, not more than 0.03% of S and the balance of iron. The high chrome alloy steel material has the beneficial effects that the hardenability and corrosion resistance of steel can be improved by increasing the content of chrome; by reasonably setting the ratio and the production process, the formed alloy material has excellent comprehensive mechanical properties and has the advantages of ultrahigh strength, good wear resistance, strong corrosion resistance and the like; by using the adopted refining agent for casting production, the yield is obviously increased, and in particular, the porosity in castings is reduced by 1-2 degrees and is effectively controlled, pores can not be generated on the surfaces of the castings and oxide inclusions are obviously reduced.

A red-hardness high alloy steel material for pump valves comprises the following chemical element components by mass percent: 0.2-0.4% of carbon, 0.6-0.9% of silicon, 1.7-1.9% of manganese, 2.1-2.4% of molybdenum,1.6-1.8% of chromium, 0.02-0.04% of vanadium, 0.02-0.05% of nickel, 0.1-0.15% of niobium, 0.04-0.06% of Ta, not more than 0.04% of S, not more than 0.04% of P, and the balance of iron. The alloy steel of the invention not only has high hardness and good red hardness, but also has good toughness and good wear resistance. The method of the invention partly adopts scrap iron as a raw material; secondary refining is performed; and the comprehensive mechanical properties are improved. The alloy steel of the invention is suitable for high-wear rate parts used at high temperature, such as pump shafts, pipelines, valves and the like. The method of the invention adopts a refining agent in the casting production, which significantly improves the yield, especially reduces the degree of porosity in casting by 1-2 degrees, and controls the oxide inclusion level at about grade two.

The invention discloses a martensite alloy steel material used for an air valve of an internal combustion engine. The alloy steel material comprises following elements by weight: 0.6-0.8% of carbon, 0.2-0.3% of silicon, 3.3-3.5% of manganese, 0.4-0.5% of chromium, 0.03-0.05% of molybdenum, 0.004-0.005% of vanadium, 0.06-0.08% of Ti, 2.3-2.5% of Ni, 0.01-0.03% of Sb, S not more than 0.030% and P not more than 0.030%, with the balance being iron. According to the alloy steel material and the method, by using composition of the antimony and other raw materials, and by reasonably arranging the ratio and the production technology and reasonably arranging the adding sequence, the alloy material formed has characteristics of high strength, high hardness, good wear resistance, good toughness, resistance to high-temperature corrosion, oxidation resistance, and the like. The alloy steel material is suitable for the air valve of the internal combustion engine so that the air valve has high air tightness. A portion of waste iron is used as a raw material to make the alloy quality stable and uniform. By addition of a refining agent, the porosity degree is reduced by 1-2 degrees.

The invention relates to a rupture-resistant alloy steel hammerhead material which contains the following chemical elements in percentage by mass: 2.2-2.5% of carbon, 1.7-1.9% of silicon, 2.5-2.8% of manganese, 1.2-1.5% of copper, 2.7-3.1% of chromium, 4.4-4.6% of molybdenum, 0.6-0.8% of vanadium, 1.5-1.6% of titanium, 0.7-0.9% of boron, 1.0-1.2% of magnesium, 0.15-0.25% of Zr, at most 0.05% of S, at most 0.05% of P and the balance of iron. The material contains the boron, molybdenum, chromium, titanium and many other alloy elements, and has the advantages of high hardness, high wear resistance and favorable toughness. The material is suitable for a medium-size crusher, is used for crushing high-hardness ores, and can not easily rupture. Part of scrap iron used as a raw material is subjected to secondary refining, the post-casting heat treatment temperature is reasonably controlled, and the raw materials are added in different batches, so that the alloy quality is more stable and uniform, thereby enhancing the comprehensive mechanical properties. When the refining agent is used for casting production, the yield is obviously enhanced.

The invention discloses a wear resistant high-carbon steel pump valve material. The wear resistant high-carbon steel pump valve material comprises the following chemical elements in percentage by mass: 2.2-2.4% of carbon, 1.2-1.4% of silicon, 2.1-2.3% of manganese, 0.7-0.9% of molybdenum, 0.05-0.08% of nickel, 0.7-0.9% of vanadium, 1.2-1.4% of titanium, 0.04-0.07% of Ta, not more than 0.04% of S, not more than 0.04% of P, and the balance iron. The elements of molybdenum, vanadium and titanium are added in alloy steel based on high-carbon or low-carbon steel, so that the alloy steel not only maintains the high strength and the high hardness of the high-carbon steel but also has the characteristics of high thermal strength, good wear resistance and better toughness; and one part of waste steel serves as a raw material, and is refined twice, so that the quality is more stable and uniform. A refining agent is used for producing castings, so that the porosity is reduced by 1-2 degrees, and the oxide inclusion is at about grade 2. The alloy steel is applied to parts with high-temperature operation and high abrasion, and is long in service life.

Provided are a high erosion-resistant radiator fin aluminum alloy and a manufacture method thereof. The aluminum alloy is characterized in that the aluminum alloy is composed of the following components by weight percentage: 4.5 to 5.0% of copper, 0.1 to 0.15% of barium, 4.5 to 4.8% of manganese, 0.6 to 0.9% of titanium, 0.12 to 0.15% of boron, 0.2 to 0.3% of Mo, 0.9 to 1.2% of V, 0.04 to 0.08% of Bi, 0.20 to 0.25% of Sb, 0.06 to 0.09% of Zr, 1.2 to 1.4% of Li, 0.1 to 0.15% of Pd, and the balance being aluminum. The tensile strength of the aluminum alloy cast according to the method reaches 405 MPA when the elongation rate is 12.5%. The corrosion behavior of the alloy materials may be tested by adopting an SWAAT experiment and the test shows substantial improvements of the erosion-resistance of the aluminum alloy.

The invention provides an aluminum alloy with good processability for a radiator. The aluminum alloy is characterized by comprising the following components: on the basis of weight percentage, 5.5 to 6.0 of Si, 1.2 to 1.5 of Mg, 0.3 to 0.4 of Cu, 0.4 to 0.6 of Fe, 2.3 to 2.4 of Cr, 1 to 1.2 of Nb, 3.5 to 3.6 of V, 0.6 to 0.9 of Zr, 0.1 to 0.3 of Be, 0.06 to 0.08 of La, 0.16 to 0.19 of Ho, 0.1 to 0.15 of Li and 0.06 to 0.08 of Ba, with the balance being Al. The invention further discloses a manufacturing method for the aluminum alloy. The aluminum alloy provided by the invention has the advantages of good yield strength and elongation percentage, excellent heat conductivity and uneasy sintering.

The invention discloses a refractory steel material used for blades of centrifugal pumps. The refractory steel material comprises following chemical elements by weight: 0.2-0.4% of carbon, 0.7-0.9% of silicon, 1.2-1.5% of manganese, 0.6-0.9% of nickel, 0.5-0.7% of molybdenum, 1.4-1.6% of vanadium, 0.04-0.07% of Ho, S not more than 0.05% and P not more than 0.05%, with the balance being iron. By utilization of the silicon, the vanadium, the rare earth element holmium, and other elements, and by adding the raw materials in batches and reasonably controlling the thermal treatment temperature after casting, an alloy formed has characteristics of high strength and high hot strength, and capability of being impact resistant, corrosion resistant and wear resistant. A portion of waste iron is used as a raw material of the steel material and a secondary refining process is performed so that the quality of the steel material is stable and uniform. The steel material is suitable for centrifugal pump blades operated at high temperature so that the blades have high lift and are not liable to damage. A refining agent provided by the invention is used for casting production. The porosity degree in castings is reduced by 1-2 degrees. Oxide inclusion is at about the 2 level.

The invention discloses a wear-resistant alloy steel liner plate material with high strength. The wear-resistant alloy steel liner plate material comprises the following chemical elements by mass percent: 1.2-1.4% of carbon, 0.9-1.2% of silicon, 3.5-3.7% of manganese, 0.5-0.7% of boron, 2.1-2.3% of magnesium, 1.2-1.4% of tungsten, 0.7-0.9% of molybdenum, 0.04-0.07% of Sb, no more than 0.04% of S, no more than 0.04% of P and the balance of iron. The obtained alloy steel has good hardness, obdurability, distortion resistance, impact resistance, wear-resisting property and high-temperature resistance by using the elements such as tungsten, magnesium, stibium and the like. A part of scrap iron is used as a raw material, so that the alloy is more stable and even in quality by secondary refining, reasonably controlling the thermal treatment temperature after casting, and feeding the raw materials in batches, and the comprehensive mechanical performance is improved. A refining agent disclosed by the invention is applied to casting production, so that the yield is obviously improved, particularly, the porosity in a cast is reduced by 1-2 degrees, and oxide inclusion is at about second level.

The invention relates to an alloy steel material for a plate hammer for yttrium-containing mines, which contains the following chemical elements in percentage by mass: 1.2-1.5% of carbon, 0.9-1.2% of silicon, 2.7-3.1% of manganese, 3.2-3.5% of chromium, 0.8-1.1% of titanium, 1.2-1.5% of niobium, 1.6-1.9% of boron, 0.03-0.05% of Y, 0.8-1.2% of Mg, at most 0.05% of S, at most 0.05% of P and the balance of iron. By using high-carbon steel as the main material and containing the boron, Y, niobium and many other alloy elements, the material has the advantages of high hardness, high wear resistance, low brittleness and favorable impact resistance; the material is suitable for working conditions with severe impact; and when the material is used for crushing high-hardness materials with the particle size of 200-400mm, the service life is prolonged by 2-3 times as compared with the traditional high-manganese steel. Part of scrap iron used as a raw material is subjected to secondary refining, the post-casting heat treatment temperature is reasonably controlled, and the raw materials are added in different batches, so that the alloy quality is more stable and uniform, thereby enhancing the comprehensive mechanical properties. When the refining agent is used for casting production, the yield is obviously enhanced, the porosity in the casting is lowered by 1-2 degrees, no pores can be generated on the casting surface, and the oxide inclusion content is obviously lowered by 2 levels or so.