718 results about "Hydrogen embrittlement" patented technology

The invention relates to the technical field of new energy pipelines, in particular to an anti-cracking hydrogen-doped pipeline system and a performance degradation monitoring method thereof. The hydrogen-doped pipeline system comprises a pipeline assembly, a supporting assembly, an operation assembly, a power assembly, a storage battery pack, a system control cabinet and a power generation assembly, the phenomena of hydrogen permeation and gas stratification are effectively inhibited through innovative pipeline structure design and material optimization in the system level, the hydrogen embrittlement risk is reduced from the source, and the energy consumption is reduced. According to the method, the hydrogen atom diffusion tracking and crack initiation prediction are combined, and a multi-scale collaborative monitoring system is constructed, so that the whole-process monitoring from hydrogen atom diffusion tracking to crack initiation prediction is realized, and particularly, a quantum dot marking technology is combined with a traditional sensing network, so that the service life of the pipeline can be effectively prolonged, and the reliability and the maintenance efficiency of safety monitoring are improved.

The invention belongs to the technical field of material life prediction, and particularly relates to an X70 steel gas pipeline multi-working-condition life prediction method based on transfer learning. Aiming at the problem of low prediction precision caused by dependence on single working condition data and large distribution difference between laboratory and actual service environment data in a traditional life prediction method, the invention provides a cross-domain transfer learning framework. The method comprises the following steps: acquiring mechanical property data through slow strain tensile tests of different hydrogen doping ratios in a laboratory environment, and constructing a domain self-adaptive life prediction model in combination with multi-modal feature decoupling, dynamic distribution alignment and physical constraint fusion strategies. The method significantly reduces actual scene data requirements, realizes high-precision prediction of the residual life of the pipeline under multiple working conditions, is suitable for oil and gas pipeline health monitoring and hydrogen embrittlement risk assessment, and has the advantages of high efficiency, low cost and high reliability.

The invention provides a static mixer with a bionic starfish type inlet structure and a mixing method thereof. The static mixer comprises a shell, a cavity is formed in the shell, one end of the shell is provided with an air inlet communicating with one end of the cavity, and the other end of the shell is provided with an air outlet communicating with the other end of the cavity; an air inlet pipe set is arranged at the end, close to the air inlet, of the shell and comprises a center air inlet pipe extending in the axial direction and five peripheral air inlet pipes evenly distributed in the circumferential direction of the center air inlet pipe. The central air inlet pipe and the peripheral air inlet pipe form a bionic starfish type inlet structure for simulating a central disc and a radiation wrist structure of starfish; a plurality of spiral pieces arranged in the axial direction of the cavity are arranged in the cavity, and the arrangement angles of the adjacent spiral pieces are different. By means of the bionic starfish type inlet structure design, hydrogen is evenly dispersed to the whole mixing area, the mixing uniformity of natural gas and hydrogen is effectively improved, and meanwhile the risk of hydrogen embrittlement is delayed.

This high-pressure tank stores, inside a tank body, a mixed gas that contains natural gas and hydrogen, and that contains more than 2% hydrogen by volume. The tank body includes: a cylindrical part extending in a first direction; and a dome part connected to both ends of the cylindrical part in the first direction. The steel material constituting the tank body has a tensile strength TS of 850 MPa or higher, has a structure in which 95% or more by area ratio is tempered martensite, and includes carbides of 100 nm or less scattered in the metal structure as precipitates. The high-pressure tank has a strength of 11250 cycles or more in crack progress analysis, suppresses the influence of hydrogen embrittlement in metal, ensures gas storage capacity, and has a reduced weight.

The invention discloses a hydrogen embrittlement-resistant high-strength titanium alloy and a preparation method thereof. The hydrogen embrittlement-resistant high-strength titanium alloy comprises the following components in percentage by mass: 5.5%-6.5% of aluminum, 3.5%-4.5% of tin, 3.2%-3.8% of zirconium, 0.4%-0.6% of molybdenum, 0.7%-1.2% of tungsten, 0.25%-0.35% of niobium, 0.4%-0.6% of silicon, 0.8%-1.2% of yttrium, 0.03%-0.08% of carbon and the balance of titanium and inevitable impurities. The hydrogen embrittlement-resistant high-strength titanium alloy is prepared through the following steps that after cogging treatment is carried out on a smelted as-cast alloy blank, forging and heat treatment are carried out. The titanium alloy has no hydrogen embrittlement phenomenon after hydrogen charging stretching, the strength and hydrogen embrittlement resistance of the material are both considered, the Rm after hydrogen charging can reach 1180 MPa and is higher than that before hydrogen charging, and the ductility after hydrogen charging can reach 11.3% and is equivalent to that before hydrogen charging.

The invention discloses a preparation method of a super hydrogen embrittlement-resistant carbon steel material based on laser surface treatment, which comprises the following steps: carrying out surface pretreatment on a carbon steel substrate, and carrying out surface pretreatment including sand blasting treatment, ultrasonic cleaning and preheating treatment; laser cladding equipment is adopted to synchronously convey alloy powder on the surface of the pretreated carbon steel matrix for alloying treatment, and an alloying layer containing carbide is formed; the laser power and the scanning speed are adjusted to conduct gradient treatment on the alloying layer, and a gradient transition layer from the surface layer to the base body is constructed; performing laser shock peening treatment on the gradient transition layer to generate a shock peening layer; step type annealing treatment is conducted on the base body obtained after impact strengthening, and the component content is monitored in real time; through the synergistic effect of the gradient alloying layer and the impact strengthening layer, a carbide hydrogen barrier and a residual compressive stress protection layer are formed on the surface layer of the material, so that the hydrogen diffusion coefficient is reduced; the gradient transition structure effectively relieves interface stress concentration, and the hydrogen embrittlement resistance of the carbon steel material is improved.

The invention discloses an intelligent early warning and hierarchical linkage disposal method for hydrogen pipeline leakage, and relates to the technical field of hydrogen pipeline safety monitoring, and the method comprises the steps: building a pipeline health fingerprint reference library, deploying a five-dimensional cooperative sensing array, synchronously collecting, purifying and processing leakage and hydrogen embrittlement signals, and extracting core feature parameters; a dynamic algorithm is utilized to quantify hydrogen embrittlement risks, a leakage point is positioned, a comprehensive decision result containing information such as risk types and levels is output, differential grading disposal is started according to the decision result, emergency resources are deployed through a resource scheduling algorithm, a disposal plan is dynamically optimized through a closed-loop feedback mechanism, and efficient management of hydrogen pipeline safety is achieved.

The purpose of the present invention is to provide: a steel material which is suitable as a steel structure used in a hydrogen gas environment, has excellent hydrogen absorption resistance in a hydrogen gas environment, and has excellent hydrogen embrittlement resistance; and a method for producing same.　The steel material has a specific component composition, wherein the amount of saturated hydrogen that has entered in a hydrogen gas environment at a hydrogen gas pressure of 40 MPa is less than a predetermined value. The predetermined value is 0.8 ppm by mass when the tensile strength TS of the steel material is less than 500 MPa, and is a hydrogen amount CH (ppm by mass) calculated from formula (1) when the tensile strength TS of the steel material is 500 MPa or more. (1): CH (ppm by mass) = 5.4637e-0.004 × TS (MPa) In formula (1), TS (MPa) is the tensile strength of the steel material.

The invention belongs to the technical field of metal composite materials and hydrogen storage and transportation materials, and particularly relates to a high-strength hydrogen-embrittlement-resistant layered metal composite material for hydrogen storage and a preparation method and application of the high-strength hydrogen-embrittlement-resistant layered metal composite material. According to the preparation method, the nickel-saving austenitic stainless steel (NEASS) and the 30CrMo steel are alternately overlapped in a multi-layer mode, and the processes of vacuum electron beam welding, high-temperature hot rolling, accumulative ply rolling, multi-stage heat treatment and the like are combined, so that the composite board with the layer number reaching hundreds of layers, firm interface bonding, excellent mechanical performance and good hydrogen embrittlement resistance is prepared; the technical problem that strength, toughness and hydrogen brittleness resistance of an existing metal material in a high-pressure hydrogen environment are difficult to consider at the same time is solved. The obtained composite material has high strength, high plasticity and excellent hydrogen embrittlement resistance, and is suitable for structural materials of high-pressure hydrogen storage tanks, hydrogen conveying pipelines and other key hydrogen energy equipment.

The invention provides a plasma heating hydrogen-rich direct reduction ironmaking system and method. The system comprises a plasma shaft furnace, a heat exchanger, a washer, a desulfurization device, a dehydration device and a pressurization device, the plasma shaft furnace comprises a feeding area, a reduction area, a blanking area and a plasma heating area from top to bottom; the plasma heating area is provided with a hydrogen plasma torch, a thermal reduction gas circulation outlet and a hydrogen inlet; and the hydrogen plasma torch is used for heating and ionizing hydrogen entering from the hydrogen inlet. According to the system and method, the green electricity hydrogen plasma torch is adopted for heating and ionizing hydrogen, then sponge iron is heated and reduced to produce molten iron, compared with a traditional hydrogen heating mode, the heating speed is high, the temperature is high, carbon-containing fuel is not combusted, safety and hydrogen embrittlement are achieved, compared with a traditional shaft furnace for producing sponge iron, low-quality ore can be adopted for producing molten iron, and the production cost is low. The control is convenient.

The invention discloses a pickling-free cold heading Kovar alloy wire production process which comprises the following steps: S1, raw material preparation: preparing the following raw materials in percentage by mass: 41.5% of Ni, 0.5% of Co, less than or equal to 0.03% of C, less than or equal to 0.05% of Mn, less than or equal to 0.05% of Si, less than or equal to 0.02% of P, less than or equal to 0.02% of S and the balance of Fe; mixing the materials, and carrying out vacuum induction melting and electroslag remelting to prepare an alloy ingot; the alloy cast ingot is subjected to hot rolling treatment to form a hot-rolled wire rod with the diameter being 12.0-16.0 mm; s2, peeling treatment is conducted, specifically, surface layer defects of the hot-rolled wire rod in the step S1 are removed through a peeling machine; s3, dry-type drawing treatment is conducted, specifically, the hot-rolled wire rod treated in the step S2 is subjected to dry-type drawing through a dry-type drawing die to form an alloy wire; s4, intermediate annealing treatment is conducted, specifically, the alloy wire in the step S3 is placed in an annealing furnace, sufficient hydrogen is input into the annealing furnace, intermediate annealing is conducted under the hydrogen protection atmosphere, the annealing temperature is 950-1100 DEG C, and the annealing walking speed is 3-5 m / min; the surface quality and the size consistency of the wire can be improved, meanwhile, the defects of environmental pollution, hydrogen embrittlement and the like are reduced, and the use requirements of high-end precise cold heading parts are met.

The invention discloses an annular furnace heat-resistant supporting forged chassis and an additive manufacturing process and a fixing device thereof, and belongs to the technical field of plating of metal materials, and the annular furnace heat-resistant supporting forged chassis comprises the steps that heat-resistant alloy steel base metal with specific components is prepared; carrying out laser texturing and nickel-based alloy bottom layer pretreatment on the surface of the steel plate; performing laser cladding on high-silicon high-temperature alloy powder containing niobium and rare earth elements to form a functional cladding layer, and performing gradient cladding on the edge of the atmosphere guide hole; and finally, carrying out heat treatment and assembling with a fan-shaped refractory brick fixing device. A composite oxide film and a multi-scale strengthening system are constructed, hydrogen resistance and brittleness resistance are effectively achieved, interface thermal stress is relieved, cracking and stripping of a cladding layer are avoided, a fixing device adapts to thermal expansion, the atmosphere is dredged, and the annealing uniformity of a steel coil is improved; the problems of creep deformation, hydrogen embrittlement, cladding layer stripping and thermal stress cracking of a traditional supporting component under the conditions of high temperature, heavy load and nitrogen and hydrogen atmosphere are solved.

The invention discloses a hydrogen embrittlement-resistant welding wire for tailor welding of ultrahigh-strength aluminum-silicon coating hot-formed steel and a welding method, and belongs to the technical field of metal materials. 5.0%-7.0% of Ni; 0.3%-0.6% of Mo; 0.08% to 0.12% of Nb; mo, Nb and C react to form Mo2C / NbC nanophase fixed free hydrogen; 0.05%-0.1% of V: carrying out a reaction to form VC nanophase fixed free hydrogen; 0.5% to 0.8% of La; 0.3%-0.5% of Ce; 0.1%-0.5% of Ti; according to the invention, hydrogen atoms diffused in the welding process can be captured, the hydrogen content in a welding seam is obviously reduced, and the diffusible hydrogen amount is reduced by more than 40% under the hydrogen capturing effect of retained austenite, so that the hydrogen-induced crack sensitivity is reduced by 70%.

The invention discloses austenite hydrogen-resistant stainless steel and a preparation method thereof, and belongs to the field of metal materials. The austenitic hydrogen-resistant stainless steel comprises the following chemical components in percentage by mass: less than or equal to 0.06% of C, less than or equal to 1.00% of Si, 3.00-5.00% of Mn, 19.50-22.00% of Cr, 11.00-13.00% of Ni, 1.50-2.00% of Mo, 1.50-3.50% of Cu, 0.20-0.30% of V, 0.10-0.23% of Nb, 0.30-0.40% of [N], less than or equal to 0.01% of P, less than or equal to 0.004% of S, less than or equal to 0.003% of [O] and the balance of Fe. The preparation method comprises the steps of vacuum induction melting, high-temperature homogenization, forging, hot rolling and heat treatment. The method solves the problems that traditional austenitic stainless steel is poor in hydrogen embrittlement resistance and an existing process is difficult to consider precise regulation and control of high purity, low impurities and hydrogen trap elements at the same time.

Provide a steel material having high strength and excellent hydrogen embrittlement resistance characteristics. The steel material according to the present disclosure has a chemical composition in mass %, C: 0.25 to 0.30%, Si: 0.10 to 0.50%, Mn: 0.05 to 0.60%, P: 0.050% or less, S: 0.0100% or less, Al: 0.001 to 0.100%, Cr: 0.50 to 1.50%, Mo: 0.80 to 2.00%, Ti: 0.002 to 0.010%, V: 0.08 to 0.30%, Nb: 0.010 to 0.050%, B: 0.0001 to 0.0050%, N: 0.0100% or less, O: 0.0100% or less, and the balance consisting of Fe and impurities, a tensile strength of 900 to 1100 MPa, an original austenite grain size of 20.0 μm or less, and a dislocation density of 7.0×10 14 m -2 or less, and the Q value obtained from the line profile of X-ray diffraction is 2.35 or more.

The invention discloses a method for obtaining a critical stress intensity factor of a hydrogen environment material, and belongs to the technical field of stress intensity factor measurement. According to the method disclosed by the invention, a hollow notched sample is prepared from a suitable pipeline material according to hydrogen embrittlement research, then the two ends of the sample are filled with hydrogen, tensile test loading is carried out, and the test is stopped after the sample is failed and fractured due to hydrogen embrittlement. The method is more in line with the actual stress state of the pipeline, can provide the material stress intensity factor value and the critical fracture stress intensity factor of the material under different loads, and has important significance for evaluating the fracture toughness and crack resistance of the material in the hydrogen environment.

The invention discloses a SiO2 / alpha-Al2O3 composite hydrogen-resistant coating for a hydrogen conveying pipeline and a preparation method of the SiO2 / alpha-Al2O3 composite hydrogen-resistant coating, and belongs to the technical field of hydrogen resistance of hydrogen conveying pipelines. The composite hydrogen-resistant coating disclosed by the invention is of a sandwich composite structure of a base material, namely SiO2-alpha-Al2O3; a radio frequency magnetron sputtering method is adopted, the composite coating with the related thickness is flexibly prepared by controlling parameters, the preparation method is simple and easy to implement, the preparation cost is low, and according to related experimental results, it is proved that the obtained SiO2 / alpha-Al2O3 composite hydrogen resistance coating for the hydrogen conveying pipeline is compact in structure, bonding between a base material and SiO2 and between SiO2 and alpha-Al2O3 interfaces is tight, and the film-substrate bonding force is 8.5 N; the hydrogen permeation activation energy is 146.2-177.9 kJ. / mol, the hydrogen permeation pressure index is 0.73-0.91, the problems of hydrogen permeation and hydrogen embrittlement of the hydrogen conveying pipeline can be greatly solved, and the service safety of the hydrogen conveying pipeline is guaranteed.

The present disclosure provides a hydrogen decrepitation apparatus and a hydrogen recycling method. The hydrogen decrepitation apparatus comprises a hydrogen decrepitation furnace, a solid hydrogen-storage device, a first hydrogen recovery pipeline, a second hydrogen recovery pipeline, a hydrogen reuse pipeline, a first discharge pipe, a second discharge pipe, an inert gas pipeline, and a bypass pipeline. The hydrogen decrepitation apparatus enables hydrogen used in hydrogen decrepitation to be reused, thereby reducing costs of hydrogen decrepitation and lowering energy waste.

The present invention relates to a hydrogen embrittlement evaluation method and an evaluation device, and provides a hydrogen embrittlement evaluation method comprising: a step for applying a stress to a test piece of a steel material so as to have a stress triaxial value pre-selected from the range of 0.30-0.80; and a step for determining the limit hydrogen amount of the steel material. Also provided is a hydrogen embrittlement evaluation device provided with: a holder for holding a test piece of a steel material; the stress applying mechanism is used for applying stress to the test piece; a display unit that displays the amount of displacement of the test piece to which the stress has been applied; and a transmission mechanism for mechanically transmitting the amount of displacement of the test piece to the display unit, in which the application of the stress can be controlled by the stress application mechanism so that the amount of displacement of the test piece corresponds to a predetermined stress triaxial value.

The present invention discloses a preparation method of a graphite-like carbon nitride-yttrium-stabilized zirconium oxide composite hydrogen barrier coating. First, a low-carbon steel substrate is pretreated to obtain a pretreated substrate; then zirconium n-propyl alcohol, n-propyl alcohol, acetylacetone and yttrium nitrate are mixed and reacted, aged to obtain a yttrium-stabilized zirconium oxide sol; the sol is coated on the pretreated substrate and dried, and the coating, drying and repeated treatments are followed by pre-sintering, followed by repeated coating, drying, and finally heat treatment to obtain a yttrium-stabilized zirconium oxide coating YSZ; melamine and thiourea are mixed, calcined and ground to obtain powdered graphite-like carbon nitride g-C3N4; finally, g-C3N4 powder and a coating coated with YSZ are sintered to obtain a graphite-like carbon nitride-yttrium-stabilized zirconium oxide g-C3N4 / YSZ composite coating. The hydrogen barrier coating prepared by the present invention can solve the problem that hydrogen embrittlement is prone to occur when current steel equipment is used in a hydrogen environment, and improve the safety of steel equipment during hydrogen energy utilization.

The hydrogen transmission pipeline steel comprises the following chemical components in percentage by mass: 0.020%-0.045% of C, 0.11%-0.19% of Si, 1.45%-1.65% of Mn, less than or equal to 0.0010% of S, less than or equal to 0.008% of P, 0.015%-0.045% of Al, 0.040%-0.060% of Nb, 0.020%-0.035% of Ti, 0.30%-0.50% of Cr, 0.0040%-0.0080% of RE, less than or equal to 0.004% of N, less than or equal to 0.0015% of O, less than or equal to 0.0001% of H and the balance of Fe and other inevitable impurities, the conditions that the carbon equivalent Ceq = C + Mn / 6 + (Cr) / 5 is less than or equal to 0.35%, the Nb / Ti = the rare earth element is selected from at least one of lanthanum, cerium and neodymium. The invention aims to solve the technical problems that the existing hydrogen transmission pipeline steel is easy to generate hydrogen embrittlement, short in fatigue life and high in production cost in a high-pressure hydrogen environment, and meets the core requirements of hydrogen energy long-distance transmission pipeline engineering on high strength, high hydrogen embrittlement resistance, high fatigue performance and low cost of materials.

The invention relates to the field of research on hydrogen embrittlement sensitivity of metal materials, in particular to a device for detecting hydrogen embrittlement sensitivity of a metal material in pure hydrogen and hydrogen-doped environments. The whole device is divided into an upper clamp main body and a lower clamp main body which are oppositely arranged up and down, and the upper clamp main body is provided with an upper clamp upper side through hole, an upper clamp lower side through hole, an upper clamp left side through hole, an upper clamp right side through hole and a pressed rod insertion hole. The lower part clamp main body is provided with a sample fixing groove, a sealing groove, an air cavity, a lower part clamp left side ventilation channel, a lower part clamp right side ventilation channel, a lower part clamp upper side screw hole, a lower part clamp lower side screw hole, a lower part clamp left side screw hole and a lower part clamp right side screw hole. According to the device and the method, the real working condition of contact between gas phase hydrogen and a metal material in actual engineering can be simulated, the problem of experimental cost caused by equipment requirements and sample processing can be solved, and meanwhile, the operation process of an experiment can be greatly simplified.

The utility model relates to the technical field of pipeline detection, in particular to a hydrogen pipeline material safety detection device which comprises two connecting semi-rings, connecting mechanisms are arranged on the two connecting semi-rings, and the two connecting semi-rings are fixed to the outer side of a pipeline in a butt joint mode through the connecting mechanisms. The detection mechanism is arranged on the inner side of the connecting semi-ring and comprises a coupling positioning assembly and an acoustic emission instrument, the coupling positioning assembly is arranged on the connecting semi-ring, and the acoustic emission instrument is arranged in the detection cylinder on the inner side of the connecting semi-ring; the detection mechanism can be matched with the moving mechanism to complete dynamic detection on the hydrogen pipeline; through the cleaning mechanism, dust and impurities on the surface of the pipeline can be cleaned by using a brush in the moving process of the connecting ring, and secondary cleaning is performed on the pipeline by cooperating with the fan to blow airflow and using an exhaust outlet, so that attachment of the dust and impurities is reduced, and the situation that the dust and impurities are attached to the pipeline to affect the detection effect is avoided; the problem that an existing hydrogen embrittlement detection method cannot carry out dynamic nondestructive detection on the hydrogen pipeline is solved.

The invention discloses a preparation method of a copper bar with zero high-temperature heating defect, which comprises the following steps of: smelting, up-drawing continuous casting, rolling, coiling, peeling, multi-pass coiling, reserved bottom annealing and drawing, the hydrogen embrittlement grade of the copper rod subjected to upward continuous casting reaches the second grade or below; in the rolling process, the rolling speed is 3-10 m / min, and the machining rate is larger than or equal to 30%. The hydrogen embrittlement grade of the copper rod is reduced, the surface defects of the copper rod are eliminated, and the liquid leakage condition during high-temperature heating is avoided by raising the height of the cooling water tank during upward continuous casting and combining cold machining modes such as rolling and coiling.

The present invention provides an ultrahigh-strength cold rolled steel sheet having a tensile strength of 1,100 MPa or more and excellent hydrogen embrittlement resistance, and a manufacturing method therefor. According to one embodiment of the present invention, the ultrahigh-strength cold rolled steel sheet having excellent hydrogen embrittlement resistance comprises, by wt%, 0.1-0.5% of carbon (C), 0.01-2.0% of silicon (Si), 0.1-5.0% of manganese (Mn), 0.01-2.0% of aluminum (Al), more than 0% and less than or equal to 3.0% of chromium (Cr), more than 0% and less than or equal to 1.0% of molybdenum (Mo), more than 0% and less than or equal to 0.4% of nickel (Ni), 0.05-0.4% of copper (Cu), 0.01-0.2% of titanium (Ti), 0.01-0.1% of niobium (Nb), 0.01-1.0% of vanadium (V), 0.001-0.005% of boron (B), more than 0% and less than or equal to 0.02% of phosphorus (P), more than 0% and less than or equal to 0.01% of sulfur (S), and the balance of iron (Fe) and other inevitable impurities, and satisfies a tensile strength (TS) of at least 1,100 MPa, an elongation (EL) of at least 3% and a hydrogen embrittlement test non-fracture time of at least 100 hours.

The invention belongs to the field of hydrogen conveying, and particularly relates to a flexible hydrogen conveying pipe and a preparation method thereof and a hydrogen leakage detection system.The flexible hydrogen conveying pipe is of a structure mainly made of non-metal materials, the problem of hydrogen embrittlement is fundamentally solved, and the safety and reliability of the hydrogen conveying pipe in the long-term use process are improved. According to the invention, the internal pressure bearing layer is reinforced by adopting high-strength fibers, and can bear higher internal hydrogen pressure after being woven, so that the structural integrity of the pipeline under a high-pressure conveying working condition is guaranteed; meanwhile, the inner pressure bearing layer composite optical fibers can monitor the pipeline state to prevent third-party damage, the optical fiber monitoring system can accurately position the pipeline position in real time and conduct all-dimensional monitoring on the pipeline state, potential safety hazards can be found in time, accurate fault information is provided for maintenance personnel, maintenance measures can be taken in time, and the maintenance efficiency is improved. The accident risk and the maintenance cost are reduced.

The invention relates to a steel plate base body, a pre-plated steel plate and a preparation method thereof, a hot stamping forming component and a preparation method thereof and an automobile structural part. The steel plate substrate comprises 0.29 to 0.42 wt% of C, 0.15 to 0.50 wt% of Si, 0.30 to 0.90 wt% of Mn, 0.10 wt% or less of P, 0.10 wt% or less of S, 0.10 to 0.50 wt% of Al, 0.05 to 0.10 wt% of Nb, 0.001 to 0.02 wt% of B, 0.20 to 0.80 wt% of W, 0.10 wt% or less of impurities, and the balance of Fe. The hot-stamping formed steel plate disclosed by the invention can have high strength and high hydrogen embrittlement-resistant delayed cracking performance at the same time.

Provided herein is a high-pressure fluid storage container with oxidation resistance / hydrogen embrittlement resistance through surface treatment.

The invention discloses an intelligent monitoring system for hydrogen embrittlement detection and an implementation method of the intelligent monitoring system, and relates to the field of material structure monitoring, a strain sensor, a temperature sensor and a hydrogen concentration sensor are installed, and a wireless sensor network is constructed to achieve real-time monitoring of the strain state, the temperature change and the hydrogen concentration of a material; in the data processing stage, monitoring data is smoothed, cleaned and normalized, noise is effectively eliminated, the data quality is improved, the characteristics of the strain rate, the temperature change rate and the hydrogen concentration change rate are extracted, and subdata sets are obtained through recursion division; evaluating the relationship between the characteristics and the hydrogen embrittlement risk by calculating a Pearson's correlation coefficient, and calculating an abnormal score by using an isolated tree algorithm so as to divide risk conditions; creating a RESTfu API interface, regularly generating a hydrogen embrittlement risk report, and implementing corresponding monitoring and maintenance measures according to the risk level; through the method, the equipment safety and the management efficiency are improved, accidents and loss caused by hydrogen embrittlement are reduced, and the overall management efficiency is improved.

The invention relates to the technical field of natural gas transportation safety, in particular to a hydrogen embrittlement risk online monitoring system and method for a hydrogen-doped natural gas pipeline based on multi-parameter fusion, and the system comprises a sentry sensing unit which adopts a metal short pipe which is the same as a to-be-monitored hydrogen-doped natural gas main pipeline in property, material, process, wall thickness and service history, an internal circulating medium is kept consistent with the main pipeline; the risk sensor is provided with a multi-parameter sensor to obtain risk sensing parameters including hydrogen permeation current, pipe wall micro-strain and temperature signal parameters; the signal processing unit is connected with the sentry sensing unit, receives the risk sensing parameters and analyzes and generates hydrogen embrittlement risk indexes through a risk analysis model; and the risk warning unit is connected with the signal processing unit, and triggers a danger prompt signal when the hydrogen embrittlement risk index is greater than a preset safety index. The method has the effect of meeting the danger monitoring effectiveness of safe operation of the hydrogen-doped natural gas pipeline.