93 results about "Macro-engineering" patented technology

The invention relates to a steel plate for a low-temperature vessel and a production method thereof, belonging to the technical fields of special steel plates and steel plate production methods. The steel plate for a low-temperature vessel is produced by smelting the following components in percentage by weight: no more than 0.12% of C, 0.15-0.50% of Si, 1.2-1.6% of Mn, 0.3-0.8% of Ni, no more than 0.010% of P, no more than 0.005% of S, 0.020-0.045% of Al, no more than 0.040% of Nb and the balance of Fe and inevitable impurities. The invention develops a new steel plate for a low-temperature vessel and a production method thereof. The favorable mechanical property of the steel plate is ensured under the condition of low noble alloy consumption, so that the steel plate has good organization, comprehensive property and weldability, the low-temperature impact toughness of the steel plate in a delivery state and a die welding state is improved, and the requirements of the market for high-quality steel for a low-temperature vessel are met, thus making positive contributions for domestic production of large engineering low-temperature equipment and achieving remarkable economic benefits.

The invention relates to a 1000MPa grade high-tenacity high-property-uniformity super-thick steel plate easy to weld. With Fe as the basic element, the steel plate comprises the chemical components of, by mass, 0.12-0.15% of C, 0.15-0.35% of Si, 0.95-1.20% of Mn, no more than 0.010% of P, no more than 0.002% of S, 0.5-0.8% of Cr, 0.4-0.6% of Mo, 2.4-3.0% of Ni, 0.2-0.4% of Cu, 0.06-0.09% of Al, 0.03-0.06% of V, no more than 0.04% of Nb, no more than 0.006% of N, 0.001-0.002% of B and impurity elements. When the carbon equivalent is no more than 0.75%, the thickness of the steel plate reaches 180 mm. According to the 1000MPa grade high-tenacity high-property-uniformity super-thick steel plate easy to weld, in order to meet requirements of large engineering equipment, a high-quality and high-purity continuous casting sheet billet produced by means of the optimized chemical components, high-purity molten steel and an optimized continuous casting process is adopted as a billet material, and the super-thick steel plate meeting the requirements is manufactured through a method of controlling rolling, quenching and low-temperature tempering.

The invention discloses a multiphase transversal arrangement circular laying construction method, which adopts a major engineering barge as a submarine cable laying ship, and adopts transversal arrangement of submarine cables, back-twist of a pi-shaped back-twist rack and transverse pull of heave away anchors of the barge, and comprises the concrete steps of construction preparation, top end landing construction, middle sea segment laying construction, tail end landing construction, circularly laying construction and submarine cable protection. The method has the advantages that the effective operation area is large, the adverse environmental impact can be effectively resisted, the laying and inclination adjustment efficiency is improved, measurement and control can be accurately performed, the routing deviation is avoided, the degree of automation is high, and the construction efficiency is high.

The invention discloses a load and freeze-thaw cycle coupled concrete durability testing device and an evaluation method. The device comprises a concrete load and freeze-thaw cycle coupling device, aconcrete strain testing system and a freeze-thaw testing machine. The concrete load and freeze-thaw cycle coupling device is placed in the freeze-thaw testing machine for a freeze-thaw cycle couplingtest. Sample strain data is recorded at real time through the concrete strain testing system, and by testing parameters such as rate of strain change, rate of mass change, etc. of a test piece after acertain times of load and freeze-thaw cycle coupling, durability of the concrete is evaluated. According to the invention, durability of loaded concrete (member) serving in severe cold areas can be rapidly tested, and load and freeze-thaw cycle coupling effect in actual service is accurately simulated. The method is simple to operate and is scientific and effective. The invention provides technical support for durability design and material selection of large-scale engineering structures under complex service conditions such as severe cold condition, etc.

A method for predicting seismic safety for extremely large engineering project includes using finite element (FE) preprocessing software to set up FE module, inputting parameters required by active time histories of seism for obtaining mathematical module, transmitting the model and time step length to supercomputer to carry out transient response analysis and model analysis for parallel calculation, sending data back to FE analysis software for following calculation and carry out visual processing by using FE post processing software to read in calculation result .

The invention discloses an intelligent controller system for large engineering equipment. The intelligent controller system comprises a mainboard, a signal acquisition unit and a self-adaptive PLC communication module. A CPU which is based on an embedded parallel processing framework is arranged on the mainboard. The mainboard is connected with a sensor or an instrument in the large engineering equipment through the signal acquisition unit, acquires equipment operating state signals or detection data detected and output by the sensor or the instrument, outputs a control instruction to a controlled device in the large engineering equipment, and controls the controlled device to operate automatically. The mainboard is connected and in communication with a PLC in peripheral equipment through the self-adaptive PLC communication module, forms an internet of things, conducts configuration monitoring on the PLC, and synchronously backups all data in peripheral controllers in the internet of things by means of a distributed data storage technology. The intelligent controller system for the large engineering equipment has the advantages of being high in system data processing speed, high in system operational stability, safe, and high in efficiency, and lowering the difficulty in system design, development and maintenance at a later period.

The invention discloses a food safety risk supervision mobile laboratory. The mobile laboratory provided by the invention comprises an engineering truck, wherein at least one electric leg which can be contracted to the ground is arranged at the bottom of a coach of the engineering vehicle; and a food detection related instrument is arranged in the coach of the engineering truck. The laboratory combines the detection analysis function of the traditional biological and a chemical laboratory with mobility and convenience of large engineering trucks, can supervise food safety in real time, has the advantages of strong maneuverability, high-end equipment, complete detection items, greenness and environmental protection, self-sufficiency of water, electricity and gas and the like, and can deal with field test tasks of various national-grade large activities and food safety emergency incidents.

The invention discloses a large-scale project management system based on the blockchain technology. A central node, stakeholder nodes, a key module, an information retrieval module and a block structure module form an integrated body; the central node is a planning department node, the stakeholder nodes are a R&D department node, an expert group node, a finance department node, a construction unitnode and a device unit node; the central node and the stakeholder nodes are connected through the P2P network. The system is advantaged in that the stakeholder nodes of the enterprise large-scale project and the project implementation flow are interconnected through the blockchain technology, and stakeholders are made to participate effectively in large-scale project management; data generated during project implementation are stored in the multiple nodes, and data availability is improved; blockchain reading and writing permissions are effectively allocated, and data security and non-repudiation are improved; the contract dispute risk and transaction cost are reduced, and transaction automation is promoted.

The invention discloses a structural system vulnerability evaluation method based on an ECBN (Explicit Connectivity Bayesian Network). The method aims at the limitations that conventional vulnerability analysis is mainly centralized at a component level and system failure probability reasoning is developed with little consideration to a probabilistic dependency relationship among components. The invention considers a combined effect of various component damages by the ECBN, discloses a root node prior probability evaluation model based on a multi-dimensional performance limit state equation, and strives to really reflect a component damage state and improve evaluation accuracy; the probabilistic dependency relationship among the components is considered by utilizing an analytic hierarchy process, and Bayesian network intermediate node condition probability information is constructed; and the method is particularly practical in a case of shortage of damage data, and finally, implementsreasoning from component vulnerability to structural system vulnerability by a variable elimination algorithm. Insufficient research on vulnerability evaluation of a large-sized engineering structuralsystem is made up, scientific supporting is provided for safety construction and effective operation of the important engineering structural system.

The invention discloses high-carbon cold-rolled automobile diaphragm spring steel. The high-carbon cold-rolled automobile diaphragm spring steel is prepared from the following constituents in percentage by weight: 0.70-0.90% of C, 0.15-0.35% of Si, 0.50-1.00% of Mn, P smaller than or equal to 0.008%, S smaller than or equal to 0.002%, 0.010-0.030% of Alt, 0.10-0.30% of V, 1.20-2.00% of Cr, 1.20-2.00% of Ni, 0.002-0.006% of Ca, and N smaller than or equal to 0.004%, and is prepared by the following production steps: molten iron desulphurization, smelting in a converter, refining in an LF (Ladle Furnace) furnace, processing in a RH vacuum furnace, continuous casting to form blanks, pit type slow cooling after cutting of cast blanks, cast blank heating, segmented hot rolling, reeling, slow cooling, annealing after cutting, cold rolling, quenching, tempering, and inspection for standby. The steel disclosed by the invention is rolled and thermally treated to achieve high strength, high elasticity, high limit of yielding, high fatigue limit resistance, low-temperature toughness and longer service life, and can be used for manufacturing various vehicle clutch assemblies, especially the large engineering machinery at the low temperature environment.

The invention provides an engineering machine monitoring system, belonging to the technical field of engineering machine monitoring and control and aiming to solve the problem of poor universality of the conventional high-end large engineering machine control systems. A sensing and execution driving module of the system is used for acquiring working condition parameters of an engineering machine, sending the working condition parameters to a controller area network (CAN) bus type acquisition control module, receiving control signals of the CAN bus type acquisition control module and driving the engineering machine; the CAN bus type acquisition control module is used for sending the working condition parameters sent by the sensing and execution driving module to a monitoring module, and sending the control signals sent by the monitoring module to the sensing and execution driving module; and the monitoring module is used for displaying the working condition parameters sent by the CAN bus type acquisition control module to a user, and sending the control signals to the CAN bus type acquisition control module according to control commands input by a user. In the invention, a control system does not need to be separately designed for each specific engineering machine type, so that the engineering machine monitoring system has better universality.

The invention provides a vegetation recovery method for a water front hard protection slope. The method comprises the following steps of A. digging holes in the hard protection slope and making planting holes; planting plants in a discontinuous hard protection slope removing mode; B. screening and planting plant species growing in water-land transition zones; C. planting plants in a nursery stock plantation and seeding mode, wherein plant spacing of the plants is 90% of the sum of radiuses of adjacent plant crown widths; D. nurturing nursery stocks. According to the vegetation recovery method for the water front hard protection slope, through making planting holes, namely the discontinuous hard protection slope removing mode, original protection slope stability is maintained, suitable growing environment for plants is added, and interference and influence on the riverbank ecology system by dismounting and reconstruction and other large-scale engineering can be avoided.

The invention relates to a post-tensioned pre-stressing pipeline grouting agent, which is obtained by uniformly stirring the following raw materials according to weight percentage with rotating speed of no lower than 1000r / min: 4.7-5.1% of water reducing component, 0.3-0.5% of plastic expansion component, 28.2-30.1% of middle- to late-stage swelling component, 0.1-0.2% of stabilization component, 0.3-0.5% of delayed coagulation component, 0.3-0.5% of defoaming component, 43.0-47.1% of ultrafine active mineral admixture material and 18.9-20.4% of sulphoaluminate cement. The post-tensioned pre-stressing pipeline grouting agent has good performance, can satisfy requirement of industrialized production and can satisfy requirement of on-site construction preparation, construction operation is simple, and the grouting agent is especially suitable for post-tensioned pre-stressing pipeline grouting construction of large-scale engineering such as road, bridge and nuclear power station.

The invention discloses a touch key control panel for controlling an engineering vehicle. On the basis of the conventional controller functions, common functions of a common engineering vehicle controller are realized at low cost, common human-computer interaction equipment is provided, and a vehicle action indicting lamp and an alarm device are arranged, so that an engineering operator controls a large engineering vehicle more easily and quickly; meanwhile, the working state of the engineering vehicle can be provided for the operator in real time, so that accident potentials are reduced and the safety is improved. The touch key control panel is simple in structure and convenient to use, and can be widely applied to the control of vehicle-mounted equipment of the large engineering vehicle.

The invention relates to a large-space metal spherical roof plate lattice shell structure suitable for device storage and transportation, and belongs to the field of civil engineering mechanics and mechanical engineering. According to the metal spherical roof plate lattice shell structure, a 32-face body variant plane base element serves as a foundation, and topology mapping conversion is conducted on the spherical face so that the positions of space spherical surface nodes can be obtained. A spherical lattice shell roof plate is structurally composed of body node bases, base node bases, hinge joint connecting rod pieces and foam metal thin roof plate bodies, the node bases and the hinge joint connecting rod pieces are connected through threads, and rapid and accurate installation is achieved. The whole lattice shell structure is fastened to a base beam and a ground foundation by means of base beam foundation bolts through anchor hole plates of the base node bases, and therefore the performance for bearing all outward loads is improved for the spherical lattice shell. Field installation can start from ground erecting, connection is sequentially conducted upward, a hydraulic jacking machine supports the top of the lattice shell, external expansion installation is sequentially conducted from top to bottom, construction is quite convenient, and the large-space metal spherical roof plate lattice shell structure can be used for large-scale engineering construction, device storage and transportation, and emergency rescue and relief work centers.

A large-scale structure sensing resource conflict and function reuse collaboration and fusion monitoring system comprises a blackboard which is used for recording original data, an intermediate structure and an evaluation result, an agent which is used for storing domain knowledge and a supervision and management main body; the agent which is provided with a communication interface performs communication collaboration with other main bodies through the blackboard; the supervision and management main body obtains blackboard data change to control the agent to achieve respective tasks and accordingly coordinates the integral system to achieve resource and function reuse of a distributed type sensing network and achieve rapid and accurate position of static load and impulsive load. The large-scale structure sensing resource conflict and function reuse collaboration and fusion monitoring system is used for monitoring structural strain signals caused by the static load and the impulsive load in large scale engineering structures and redundancy characteristics of different sensors and redundancy information of the same sensor are extracted by the distributed type sensing network which is formed by a strain sensor, an FBG (fiber Bragg Grating) sensor and a piezoelectric sensor due to collaboration of a self-organization sensor network and a estimation method to accurately and rapidly monitor damage.

The invention relates to a high performance nano powder body-based tread rubber of engineering tires and a preparation process thereof. The tread rubber comprises the following components: 100 weight portions of natural rubber, 40 to 55 weight portions of carbon black, 3 to 10 weight portions of zinc oxide, 1 to 3 weight portions of stearic acid, 1.1 to 2 weight portions of anti-ageing agent 4020, 1.1 to 2 weight portions of anti-ageing agent RD, 1 to 2 weight portions of promoter NOBS, 1.5 to 2.5 weight portions of sulfur, and 1 to 15 weight portions of modified nano powder body. The preparation process for the tread rubber comprises the following steps: a, mixing; b, milling; c, sulfuration with the sulfuration pressure of 15 to 20 MPa, a sulfuration temperature of 143 to 150 DEG C and the sulfuration time of 10 to 30 minutes; d, demoulding; e, posttreatment, and the like. A modified nano powder body and the rubber are compounded through a mechanical co-mixing method; and the high performance rubber nano composite tread rubber is obtained after sulfuration. The tread rubber has high strength, tear resistance, high wear and pricking resistance, and chunking and chipping resistance, and is suitable for the ties of large engineering machineries under complex and extreme construction conditions such as loaders, cranes, bulldozers, and the like.

The invention discloses a subsea X-mas tree hydraulic valve performance online monitoring and diagnostic system, which comprises a data collecting portion and a data processing portion, wherein the data collecting portion collects hydraulic data of an underwater electronic module and / or a hydraulic supply module and / or a production control system respectively, and transmits the hydraulic data to the data processing portion; and the data processing portion stores and processes the hydraulic data, compares and analyzes the hydraulic data by combining pre-stored standard hydraulic data, and outputs detection results and diagnostic information. The invention further discloses a monitoring and diagnostic method corresponding to the subsea X-mas tree hydraulic valve performance online monitoring and diagnostic system. The subsea X-mas tree hydraulic valve performance online monitoring and diagnostic system and the subsea X-mas tree hydraulic valve performance online monitoring and diagnostic method acquire and analyze data online in real time, substantially increase the working efficiency, are not affected by situations such as harsh weather and sea conditions, and eliminate safety risk of personnel and equipment during construction operation in the prior art; and the subsea X-mas tree hydraulic valve performance online monitoring and diagnostic system is applied to monitoring and diagnosis of various kinds of underwater hydraulic valves, does not request large-scale engineering equipment and a large number of operators in operation, and can save a lot of personnel and equipment cost.

The invention relates to a long-distance radar collision detection device and a method. Friction, collision and major personal safety accidents and the like are frequently caused due to a sight dead zone of a driver in an operation process of a large engineering vehicle at a port, a wharf and the like. The invention provides a stable and reliable device and a method which have strong environmental suitability and can effectively improve controllability and safety of the driver during operation of the large engineering machinery vehicle and a special vehicle. A data fusion technology of microwave radar sensors and ultrasonic radar sensors can effectively detect targets with different features in a complex environment, the influence of false interference is eliminated at the same time, and the controllability and safety of the driver during the operation of the large engineering machinery vehicle and the special vehicle can be effectively improved.

The invention relates to the field of monitoring, in particular to a construction site monitoring system and a construction site monitoring method. By unmanned aerial vehicle assisted monitoring, image and video acquisition in a whole engineering construction process is realized, and construction progress and safety conditions can be known effectively. As safety management is an important part of project management, eradication of safety production accidents is the basis for completion of set purposes of projects and is also the guarantee of smoothness in project implementation. Safety management strengthening and safety inspection intensification which are critical are normally realized by means of personnel deployment reinforcement and inspection frequency increase, which cannot completely meet requirements of existing mega project construction and management. Therefore, by application of the construction site monitoring system and the construction site monitoring method to a large engineering construction safety management process, construction site safety reliability is improved, and probability of safety accidents is reduced.

The invention discloses a method for casting a special high-alloy steel track shoe for large mining machinery. The method mainly comprises the following steps: preparing a model, modeling, baking coatings, performing mould assembling, smelting, pouring, unpacking, performing gas cutting, cleaning sand, normalizing, performing carbon gouging, performing shot blasting, polishing and performing nondestructive testing. The method provided by the invention is simple and convenient and is low in cost, the service performance of the high-alloy steel track shoe for the large mining machinery can be enhanced, the surface wear resistance is enhanced, the service life is prolonged, and the maintenance cost is reduced.

The invention provides a test bed for verifying the function of a TBM tool changing robot, and belongs to the technical field of mechanical structure design. A reduced scale test bed needs to be ableto meet hob poses at different positions for the current mainstream structural style of a TBM tool disc and a main beam; meanwhile, available space resources in the tool disc and the front end of themain beam are considered to provide an installation interface for the later tool changing robot. Comprehensively considering the above two aspects, the reduced scale test bed is designed in two parts.The first part is a tool disc simulation part which mainly provides simulation of different hob poses; and the second part is a main beam simulation part which mainly provides space constraint of thefront end of the main beam and the interface allowing for the tool changing robot to install. Thus, the size and weight of the test bed are greatly reduced, meanwhile, different poses of hobs can besimulated at many times, and the space working ability of the robot developed in the future is tested more comprehensively. The test bed provides a method reference for laboratory level function verification of large-scale engineering equipment.

The invention discloses a large-scale engineering material distribution management method, platform and system based on WeChat. The method includes: material scheduling initiation, supplier supply, logistics, inspection, metering, material distribution, material detection, and material scheduling finishing. The platform comprises following services in an API manner: ordering, supplier supply, logistics navigation positioning, message pushing, inspection stations, metering, material distribution, material detection, data analysis, authentication and audit etc. The system comprises following modules: an initiation module, a supplier supply module, a logistics processing module, a material inspection module, a cloud pushing module, a data analysis and mining module, a metering module, a distribution module, an authentication and audit module, and a material detection module etc. According to the method, the platform, and the system, various information processing conditions during logistics management in a large-scale engineering construction site are acquired and reported to a rear-end cloud system through WeChat which is a convenient mobile terminal tool, functions of data analysis and mining are employed, and effects of deepening the management and effectively monitoring the engineering quality are finally achieved.

The invention provides a consolidated grouting method for anchoring cement of a bedrock contact segment. The biggest characteristic of the method comprises the following steps of: anchoring the combined incoming-slurry steel pipe which can bear anchor action on the upper end and the lower end of the contact segment by applying a water-filter-type mud-jack anchoring method and a one-through pore-forming and a new technology of descending stage grouting; and balancing the upthrust force of the consolidated grouting pressure by anchor acting force generated by the combined incoming slurry, thus reducing the thickness of concrete boards, effectively solving the contradictions that large-scale engineering construction progress is restricted and the construction cost is greatly lowered, realizing the construction efficiency of multiply improving cement consolidated grouting, greatly accelerating the construction progress, and more beneficially promoting the completion of the overall construction progress plan.

The invention discloses an intelligent health monitoring self-repairing system and method for a fiber grating sensor network, belonging to the field of engineering structure health monitoring technology. Aiming at the reliability of an intelligent health monitoring system of a fiber grating sensor in a large-scale engineering structure, the functions of information acquisition, extraction, analysis, evaluation and the like of a conventional distributed fiber grating intelligent health monitoring system are transformed into intelligent agents that can sense the own bodies and the environments and can communicate and mutually cooperate with other agents by adopting multi-agent cooperation and decision-making techniques, failure sensors are subjected to functional compensation based on the fiber grating sensor which is survived near a damaged area through the mutual cooperation among the agents, and thus the whole intelligent health monitoring system can be restored to normal work without changing the fiber grating sensor network in a monitored object, the functional compensation for local failure of the fiber grating sensor network can be achieved, and finally, the intelligent evaluation of the health state of the monitored object can be achieved with higher accuracy and reliability.

The invention relates to a combined tensioning mechanism for a caterpillar band, which meets the special requirement on the practical tension variation by a caterpillar band assembly when a large engineering machinery caterpillar band chassis is on a smooth road surface and under a field pathless condition. The mechanism consists of a caterpillar band assembly, a tensioning device, a longitudinal beam and the like, wherein the sliding rail of the tensioning device and support lugs at the two sides of the support are arranged in a groove of a fender at the end part of the longitudinal beam; vertical plates at the two sides of the fender are respectively provided with a rectangular hole and a bracket used for installing and fixing an adjustable pad and are connected by bolts; and the exposed end of an oil cylinder piston rod at the other end is arranged in the round hole of the vertical plate of the longitudinal beam. When the caterpillar band requires smaller tensioning force, grease is filled into the oil cylinder of the tensioning device to regulate the tensioning force. In the chassis driving process, once the impact load of the chassis exceeds the limit of the chassis, an elastic gap is eliminated, the balance of extra-large tensioning force is directly borne by the support lugs arranged at the two sides of the support and the adjustable pad between the brackets of the groove of the longitudinal beam fender so as to maintain the normal work of the chassis.

The invention provides an efficient design method for a digital large-scale engineering construction site. The efficient design method comprises the following steps: establishing an enterprise site standardized component library; acquiring real terrain data of the to-be-built site; processing the obtained topographic data by using Civil3D to obtain a site processing scheme; on the basis of field processing, combining with an enterprise field station standardized component library, and utilizing Revit to obtain a standard field station design model; generating a material statistical table for cost budget; and generating a construction drawing for on-site construction disclosure. The optimal field station arrangement can be accurately simulated according to the engineering scale, the field condition, the material mechanical configuration and the like; accurate engineering quantity and material quantity metering of station construction can be directly obtained, and accurate budget cost ofstation construction is obtained; various CAD construction layout drawings are exported by using a digital standard station model, so that field temporary station construction is accurately guided, and rework is avoided; the component library can be unified according to different main body requirements, and construction standardization and visual display are easily achieved.

The invention discloses a large-scale engineering structure deformation full-time global online monitoring device and method, belongs to the technical field of large-scale safety monitoring, and can solve the technical problems of wide coverage range and high precision required by deformation monitoring of the large-scale engineering structure.According to the invention, a fiber grating array sensing optical cable, a fiber grating array signal demodulation instrument and a data processing unit are utilized to form a large-scale engineering structure deformation full-time global online monitoring system. Due to the fact that the sensing optical cables among the nodes are arranged in a crossed mode, differential detection is achieved, the influence of common mode factors is eliminated, the system is not sensitive to temperature and displacement in other directions, and stability and reliability of the system are effectively improved. The system is simple in structure and convenient to install, so that the system has large-scale engineering conditions.

The invention discloses a production method of a high-strength steel plate for engineering machinery. The steel comprises the following components of, in percentage by weight, 0.10%-0.25% of C, less than or equal to 0.80% of Si, 0.80%-1.20% of Mn, less than or equal to 0.010% of P, less than or equal to 0.0015% of S, 0.005%-0.015% of Al, less than or equal to 1.0% of Cr, less than or equal to 1.0% of Mo, 0.30%-2.0% of Ni, less than or equal to 0.30% of Cu, less than or equal to 0.015% of Ti, less than or equal to 0.020% of Nb, less than or equal to 0.080% of V, less than or equal to 0.0040% of B, less than or equal to 0.0040% of N, less than or equal to 0.0010% of O, less than or equal to 0.00015% of H, more than or equal to 95% of Fe and inevitable impurities; the process of the steel plate comprises the steps of smelting, refining, continuous casting, rolling and heat treatment; and the structure of the steel plate comprises a lath martensite matrix and a small amount of retained austenite, 5%-10% of the retained austenite is arranged on the upper surface of the steel plate, and 2%-5% of the retained austenite is arranged on the lower surface of the steel plate. The steel plate has good comprehensive mechanical properties, pure steel quality, uniform performance in transverse and longitudinal structures and rolling direction, good plate shape and surface quality and low residual stress, and shows excellent whole plate bending capacity in the rolling direction. The steel plate can be used for manufacturing large engineering machinery such as cranes and pump trucks.