Provided is a wear-resistant steel plate having excellent wear resistance, low-temperature toughness, and corrosion wear resistance. A wear-resistant steel plate having excellent low-temperature toughness and corrosion wear resistance containing, in mass percent, 0.10-0.20% C, 0.05-1.00% Si, 0.1-2.0% Mn, no more than 0.020% P, no more than 0.005% S, and 0.005-0.100% Al, and further containing one or two types of elements selected from among 0.05-2.0% Cr and 0.05-1.0% Mo, and fulfilling the condition that the amount of solid-solution Cr content of the steel (Crsol) and the amount of solid-solution Mo content of the steel (Mosol) is 0.05 ≤ (Crsol + 2.5 Mosol) ≤ 2.0, having a component structure comprising a remainder of Fe and unavoidable impurities, using an as-quenched martensite phase as a main phase, having a structure in which the prior austenite grain size is no more than 30 µm, and further having the surface hardness be at least 360 in terms of a Brinell hardness of HBW 10/3000.

Wear-resistant steel plate having excellent low-temperature toughness and corrosion wear resistance

The invention relates to a high-temperature acid chloride ion corrosion resistant steel plate and a manufacturing method thereof. The high-temperature acid chloride ion corrosion resistant steel plate is prepared from, by mass, 0.01%-0.3% of C, 0.02%-2.0% of Si, 0.1%-2.0% of Mn, 0-0.01% of S, 0-0.05% of P, 0.01%-0.1% of Al, 0.05%-2.0% of Ni, 0.05%-2.0% of Cu, 0.005%-1.0% of Cr, 0.05%-0.3% of Sn, 0.0005%-0.3% of Se, 0.005%-0.2% of Ti, 0.01%-0.1% of V, 0.003%-0.3% of Nb, and the balance Fe and inevitable impurities. The steel plate is excellent in high-temperature acid chloride ion corrosion resistance, and meanwhile the corrosion resistance is little changed along with the temperature of a corrosion medium, so that the service life is prolonged, the safety is improved, and the oil leakage accident is reduced.

High-temperature acid chloride ion corrosion resistant steel plate and manufacturing method thereof

Steel plate for structure with excellent marine atmospheric corrosion resistance and production method thereof

The invention discloses pre-hardened plastic die steel having high acid corrosion resistance According to the die steel, proportions of elements such as Cr, Mo, V, Mg and the like are properly increased on the basis of proportions of elements of traditional pre-hardened plastic die steel, meanwhile, usage amounts of other alloy elements are controlled, mechanical properties and processability of an alloy material are further improved on the basis that mechanical properties of the traditional plastic die steel are guaranteed, the die steel has the excellent acid corrosion resistance and is low in corrosion ratio at the high temperature, the surface is not abraded easily, by means of an added compound modifier formed by coating a nano tungsten carbide with rare-earth oxide-graphene oxides, the organizational structure of the die steel is refined, the interfacial compatibility among crystals is improved, strengthening and toughening effects are significant, and the modification effect is uniform and stable A preparation method of the die steel is simple and efficient, the manufacturing period is short, and the die steel is durable, can effectively improve surface quality of plastic pieces and has great production and application value

Pre-hardened plastic die steel having high plasticity and corrosion resistance and preparation method thereof

The invention provides Cu-containing nanophase strengthened easy-to-weld steel and a preparation method. The Cu-containing nanophase strengthened easy-to-weld steel comprises the following components by weight percent: less than 0.05% of C, 0.1-0.3% of Si, 0.5-1.5% of Mn, less than 0.002% of S, less than 0.004% of P, 1.5-2.5% of Cu, 4-8% of Ni, 0.3-0.8% of Al, 0.2-1% of Mo, less than 1% of Cr, 001-0.04% of Nb, 0.01-0.05% of Ti, 0.01-0.08% of V, and the balance of Fe and inevitable impurity elements. The preparation method comprises the following steps: performing induction smelting and casting under argon protection; heating cast ingots at 1,100-1,200 DEG C for 1-3 h, directly performing hot rolling at the initial temperature of 1,050-1,150 DEG C and the final temperature of 950 DEG C, and performing super-speed high-pressure water cooling after final rolling, wherein the hot rolling deformation is 50-90%; and selectively conducting solution and aging heat treatment on a rolled steel plate to obtain high-strength high-toughness easy-to-weld steel. The alloy steel is high in strength, good in plasticity, excellent in low-temperature impact toughness and easy to weld. Besides, the machining process is high in controllability, the cost is low and the operation is simple.

Cu-containing nanophase strengthened easy-to-weld steel and preparation method

The invention provides steel for the upper deck of a cargo oil tank of a tanker, which belongs to the technical field of ship plate steel. The steel comprises the following chemical components expressed in mass percentage: C 0.01 to 0.3%, Si 0.02 to 2.0%, Mn 0.05 to 2.0%, S <= 0.01%, P<= 0.05%, Ni 0.05 to 2.0%, Cu 0.05 to 2.0%, Cr 0.005 to 1.0%, Zr 0.005 to 0.2% and Hf 0.005 to 0.2%, with the balance being Fe. As needed, the steel also comprises one or more selected from the group consisting of 0.0005 to 0.2% of Ca, 0.0005 to 0.2% of Mg, 0.0005 to 0.2% of Sr and 0.0005 to 0.2% of Ba, and/or one or more selected from the group consisting of 0.0005 to 0.3% of Sn, 0.0005 to 0.3% of Sb and 0.0005 to 0.3% of Te, and/or one or more selected from the group consisting of 0. 0005 to 0.3% of W, 0.0005 to 0.3% of Mo, 0.0005 to 0.3% of Co and 0.0005 to 0.3% of REM. The steel has the advantages of excellent general corrosion resistance, greatly reduced maintenance cost and effectively improved reliability of the upper deck of the cargo oil tank in a service process.

Steel for upper deck of cargo oil tank of tanker

The invention provides steel for the lower plate of a cargo oil tankof a tanker, which belongs to the technical field of ship plate steel The steel comprises, by mass, 001 to 03% of C, 002 to 2% of Si, 01 to 20% of Mn, no more than 001% of S, no more than 0 02% of P, 005 to 20% of Ni, 005 to 20% of Cu, 0005 to 10% of Cr, 00005 to 03% of Se, 00005 to 03% of Ge, with the balance being Fe; preferably, (Cu + Ni + Cr)/S is 200 to 480 The steel can also comprise one or more selected from the group consisting of 00005 to 03% of Sn, 00005 to 03% of Sb and 00005 to 03% of Te, and/or one or more selected from the group consisting of 0 0005 to 03% of W, 00005 to 03% of Mo, 00005 to 03% of Co and 00005 to 03% of REM, and/or one or more selected from the group consisting of 00001 to 02% of Ca, 00001 to 02% of Mg, 00001 to 02% of Sr and 00001 to 02% of Ba The steel has the advantages of excellent local corrosion resistance under the conditions of a high concentration of Cl and a high acidity and effective prolongation of the service life of a steel plate when the steel plate is coated by a protective layer or is exposed

Steel for lower plate of cargo oil tank of tanker

The utility model belongs to the technical field of material corrosion, and in particular relates to a simulative corrosion tester for an upper deck on an oil cargo tank. The device comprises the following units which are in sealed connection through gas pipelines: a gas source supply unit capable of supplying multiple groups of gases, a flow and test sample temperature control unit (4), a gas mixing unit (5), a corrosion reaction unit (6) and an exhaust gas recycling unit (7). According to the utility model, the actual work condition of the oil cargo tank of an oil tank, which is operated on the sea, is conveniently simulated under the laboratory conditions, so that the experiment conditions are closer to natural conditions, a great number of scientific and reasonable test data is obtained in a shorter time, the simulative corrosion tester is used for predicating the safety of the oil cargo tank in the operating time of 25 years, and the maintenance cost is greatly reduced; meanwhile, the simulative corrosion tester is beneficial to reducing the research development period of a new product of corrosion resistant steel of the oil cargo tank.

Simulative corrosion tester for upper deck on oil cargo tank

The invention relates to high-performance Cu-containing steel and a heat processing process thereof, and belongs to the technical field of low-alloy and high-strength steel. The high-performance Cu-containing steel comprises the following components in percentage by weight: 0.01 to 0.06 percent of C, 0.10 to 0.60 percent of Si, 0.10 to 1.30 percent of Mn, less than or equal to 0.020 percent of P, less than or equal to 0.008 percent of S, 0.005 to 0.050 percent of Nb, 0.10 to 0.60 percent of Mo, 1.30 to 3.60 percent of Ni, 0.005 to 0.030 percent of Ti, 1.00 to 2.00 percent of Cu, 0.10 to 0.60 percent of Cr, 0.005 to 0.06 percent of V, 0.005 to 0.04 percent of Al and the balance of Fe and inevitable impurities. Simultaneously, the weight ratio of Ni to Cu is 1.00-2.50. The heat processing process of the steel comprises solution treatment at the temperature of between 800 and 950 DEG C and aging treatment at the temperature of between 500 and 700 DEG C. The high-performance Cu-containing steel has the advantages that the yield strength is more than or equal to 690 MPa, the Charpy V-notch impact energy at the temperature of -40 DEG C is more than or equal to 180 joules; and the high-performance Cu-containing steel has the excellent comprehensive mechanical properties and welding performance, and is suitable for steel for ocean shipping, engineering machines, oil platforms and the like.

High-performance Cu-containing steel and heat processing process thereof

The invention relates to a test sample loading device and a test sample loading method for gaseous corrosion under a top heat-transferring and temperature-controlling environment. The test sample loading device is used for researching corrosion resistance of deck steel on an oil tanker oil hold, and comprises a reaction kettle cover (1), wherein the reaction kettle cover (1) is provided with a top surface and a bottom surface; the bottom surface is provided with a plurality of test sample mounting grooves (2) which are distributed in a radial shape; the upper surface of a matched specially-shaped test sample (4) is used for carrying out heating temperature detection and the lower surface is used for carrying out corrosion detection; the loading of a test sample is finished by sequentially putting a heat-conduction gasket (5), the matched specially-shaped test sample (4) and a separation blade (6) into the test sample mounting grooves (2) in sequence and fixing by using bolts (3). The loading device and the method provided by the invention can really reflect the characteristics that a reaction material is subjected to top heat transferring and temperature controlling and the lower surface is corroded; the loading device and the method also have the advantages of simplicity and convenience for mounting the test sample, sensitivity in test sample temperature controlling and the like.

Test sample loading device and method for gaseous corrosion under top heat-transferring and temperature-controlling environment

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