Nondestructive test culture introduction

Nondestructive testing isan applied technology subject based on modern science and technology ，It on the premise of no damage to tested object internal structure, the method of applied physics, physical performance, on the surface of the test object interior or state characteristics and internal structure, check the material internal continuity (defects), if there is not qualified to judge whether the detected object, to evaluate its applicability，Nondestructive testing subject almost involves physical science of optics and electromagnetic, acoustics, atomic physics and computer science, data communication, etc，In metallurgy, machinery, petroleum, chemical industry, aviation and aerospace fields have a wide range of applications。If do not have the application of nondestructive testing technology, the quality of the steel is difficult to guarantee, may stop the machine works, the plane to take off, the rockets are difficult to heaven, car may be overturned on the road, a train could be derailed, oil and natural gas pipeline leakage may occur, boiler and pressure vessel may explode... , so to speak, in the field of modern science and technology, no technology can like nondestructive testing has such a wide range of scientific basis and application field. As one of the foundation of modern industrial technology, nondestructive testing technology to guarantee the quality of products and engineering quality plays a more and more important role, its "guardian" quality reputation has been commonly agreed in the industry。

Nondestructive testing in terms of its nature，It focuses on the specific application of science and technology，so It is a applied very strong technical discipline,Has a strong operational or manufacturability. Operation technology skilled or not, largely determines the accuracy of test results, this technology not only on the specific operation,And performance in detection of mechanical motion, automatic control, and computer applications, so call nondestructive testing, had not been comprehensive applied technology subject。

Nondestructive testing technology not only has a profound scientific background, and a rich cultural connotation; Nondestructive testing embodies the wisdom of modern science, shine with the brilliance of the modern culture, modern civilization has nondestructive testing of a contribution. In the human into the glorious 21st century today, we should be at a higher perspective to examine NDT cultural phenomenon。

Marked by X-ray was discovered in 1895, the nondestructive testing as applied technical subject has a history of one hundred years; However, when we opened the historical discourse, brushed the time's dust, we will be surprised to find that origin and development of nondestructive testing technique has a rich historical background. Let us along the history, as the history of physical science hair clues, with broader vision to look for nondestructive testing subjects the footprints of growth。

Our motherland is the world's ancient civilizations, had great contribution to the development of science and technology, science and technology of ancient China cultural heritage in many application of nondestructive testing technology, we can find that in ancient China already has a simple NDT scientific thought。

cultural connotationofNondestructive testing shows:On the basis of modern physics and modern physics to establish a set of relatively complete theory of nondestructive testing; Set up a high-quality professional team of nondestructive testing (NDT) methods, in the study on nondestructive testing theory and the application of nondestructive testing actual testing;Has a large number of nondestructive testing instruments and equipment professional manufacturers; Nondestructive testing applications in the areas of industrial production are fully, for industrial products, is the major project of quality control and quality assurance play an important role。Modern industrial important products with "high temperature, high pressure, high speed, high stress" characteristics，If you don't have the application of nondestructive testing technology,Nondestructive testing technology after a century of development, its main sex has been the world recognized. Modern industry, as it were, without the advanced nondestructive testing technology, this paper already more and more widely accepted. As a kind of scientific culture, culture of nondestructive testing has been more and more widespread concern and attention。

In the late 20th century,World get rapid development of science and technology, and also indicates the rapid development of nondestructive testing technology,New technology represented by computer and new material,Promote the rapid development of the nondestructive testing technology, such as X-ray real-time imaging detection technology, the emergence of industrial computed tomography (CT) technology, make the X-ray testing continually broaden its application domain. Although the conventional X-ray film photographic detection technology in detection sensitivity, image clarity, etc have perfect day by day, but ray detection after the introduction of computer digital image processing technology, digital processing of the image quality are comparable to those obtained with film image quality. The emergence of the application of gamma rays and high-energy accelerator, thickness increases the ray detection, which is not easy to be low energy rays penetrate the detection of possible components, such as inspection of container goods at the customs. With the development of nanotechnology, nanometer material, image acquisition device is smaller than the image intensifier, larger capacity, higher resolution, image more clear。We can imagine,Nanotechnology will further promote the development of X-ray imaging technology。

Use of ferromagnetic components defects under the action of external magnetic field to produce magnetic flux leakage phenomenon to detect parts of defect magnetic flux leakage test, has been for routine detection technology used in various kinds of quality inspection of ferromagnetic components,On the basis of again a kind of advanced nondestructive testing technology of metal magnetic memory diagnostic technique, it can be effectively applied to the equipment in service early damage detection,Its basic principle is: before ferromagnetic metals like defects or defects, the small area under the effect of the changes in the earth's magnetic field, produce a magnetic field changes the information, the so-called magnetic memory characteristics,Due to equipment's own genetic components namely microscopic defects formed in production and in the later in the operation of the load, the relationship between the metal magnetic memory, in the form of accumulated in the operation of the artifacts the size of the load force and the direction of change will cause the metal magnetic magnitude and direction of change, the leakage magnetic field on the surface of a metal component scanning detection, can be set for the area of stress concentration, which indirectly judge the possibility of the defects in ferromagnetic materials. Metal magnetic memory method does not require pretreatment was carried out on the surface of equipment, able to quickly and accurately to diagnosis of equipment, so as to achieve the aim of fatigue damage early warning and control equipment。

The nondestructive testing technology is nondestructive evaluation direction development,Nondestructive testing for the purpose of defects detection,if have overproof defect ,Generally by the testing personnel to decide whether to repair,But not all overweight defect repair was as clean as possible,whether repair Should depend on defects evaluation,so Nondestructive evaluation on the basis of the nondestructive testing (NDT) arises at the historic moment，Nondestructive evaluation of the basic approach is to (1) to stress analysis of materials (components), according to the components under load, calculation and determination of component stress of the defective parts;(2)Measure or estimate the defective parts and residual stress,（3）Determine the breaking strength of the material (4)Quantitative nondestructive testing(5)Fracture mechanics calculation, judge the dangerous degree of the defect, and finally the future of defect assessment,The emergence of the nondestructive testing evaluation promotes the development of nondestructive testing to a higher level,Nondestructive testing culture the quality concept of nondestructive testing technology in the industrial production has play a more and more important role, this role is mainly to the important quality control and quality assurance of products or components. Nondestructive testing values of culture embodies the culture of quality. Nondestructive testing in the code of conduct, quality advocate the true, the concept of pursuing perfect unity of material civilization and spiritual civilization, this is the cultural values of nondestructive testing (NDT).

With the rapid development of science and technology and the advent of the era of global economic integration, the competition of market economy will become increasingly fierce, the competition is the focus of science and technology and quality. Nondestructive testing has been wedded with quality from the date of birth, nondestructive testing is a modern industrial production of the important methods for quality control and quality assurance,Some experts assert that:In modern production, who mastered the nondestructive testing technology, who can be in an impregnable position in the fierce competition，The quality competition in today's society has gradually replaced the original price competition, the quality is no longer a luxury, the pursuit of perfect quality is an eternal theme. Nondestructive testing for its solid theoretical foundation and exquisite craft, faithfully to perform the duties of a "guardian" quality。

The knowledge economy as the main characteristics of the 21st century has come. International famous scientist Dr Juran quality management once pointed out: "if the 20th century is the century of productivity, then the 21st century is the century of quality, quality will become the theme of the new century". In the 21st century, human will feel constantly improve the quality of products and services, quality culture rise rapidly in the social culture, the quality idea, quality consciousness is increasingly deep hearts, nondestructive testing culture in order to perfect unification "superb techniques and superior quality" the quality of the ideas and values has been generally accepted. Today, bells ringing in the new century, the quality of the century has come, let us the nondestructive testing technology workers make joint efforts to meet the beautiful future.