By establishing a management system that shows full and accurate compliance with all its activities based on the ISO 9001:2015 standard, this unit has its power on fulfilling the requirements of the principles of this system. The laboratory unit by having modern laboratory equipment, expert experts, and a lot of software and hardware resources and creating suitable environmental conditions and by using valid criteria in operational methods and instructions to ensure the implementation of standard requirements in the field of duties and laboratory of the quality control unit has the task of conducting the necessary tests based on all national and international standards, which has caused all the production stages, including the inspection of incoming raw materials, inspections during production, as well as inspections and The control of the produced product to the specifications of these standards. The quality control laboratory consists of different departments, including sampling, material mechanical properties laboratory, and material chemical analysis laboratory, which is equipped with the latest test and analysis equipment.
Mechanical properties laboratory
Tensile test
One of the destructive tests is that the sample is subjected to one-dimensional tensile force up to the breaking point, while the length increase is recorded simultaneously with the applied force (applied load). Test results are typically used to select a material for quality control purposes and to predict how a material will react under other types of forces. The engineering stress/strain curve is drawn based on the values of applied force, and elongation, so the output of the test is a stress/strain curve that shows the behavior of the material under tension. The data obtained in this test are used to determine the mechanical properties of the material and the following quantities are obtained:
Yield stress
The stress at which plastic deformation or yielding occurs.
Tensile strength or ultimate tensile strength (UTS)
It is the maximum tensile stress that the sample can withstand and the ratio of the maximum force (load) to the initial cross-sectional area of the sample is defined.
The purpose of the tensile test
Tensile tests are performed for various reasons. The results of tensile tests are used in the selection of materials for engineering applications. Tensile properties will often be included in material specifications to ensure quality. Tensile properties are often measured during the development of new materials and processes to compare different materials and processes. Finally, tensile properties are often used to predict the behavior of a material under a variety of forces other than uniform tension. The strength of the material is often of primary concern, the strength in question may be in terms of the stress required to cause significant plastic deformation or the maximum stress that the material can withstand. Against it, the resistance is slow to be measured. These measurements are used with sufficient accuracy (in the form of safety factors) in engineering design. It also calculates the ductility of the material, and how much it can be deformed before breaking. Formability is rarely directly incorporated into the design, but instead, materials are included in the specification to ensure quality and stiffness. Elastic properties may also be of interest, but special techniques are used to measure these properties in tensile testing, and more accurate measurements, it can be done through ultrasonic techniques.
Chemical analysis laboratory by spectrometry method
What is quantometry?
Quantometry is a device that can be used to measure the presence of different elements in a piece. Quantum analysis with the SES spark emission spectrometer is one of the precise material analysis systems for measuring metals, which can measure alloys with great accuracy. Analyze and determine all available alloy elements and their concentration in the sample. (Qualitative and quantitative analysis) Since this device, which works based on electrical discharge, is often used to identify and analyze metallic elements, it is the most common type of analysis for the metallurgical industry.
The basis of quantum work
To perform this test, a standard sample must be prepared with a stoned, sanded, and polished surface that is completely smooth and free of any pollution and grease caused by grease, oil, etc. It should also be noted that since there is a space limitation for placing and working on samples in some quantum devices, samples should be prepared in the standard dimensions and sizes of that device and placed in the device. This test is based on optical emission. As a result of sparking, the sample evaporates due to electric discharge, the atoms and ions resulting from atomic evaporation are excited and radiate, and the radiated light passes through an optical fiber through an optical spectrometer. According to light emission wavelength range of each element, the most suitable emission line is selected to determine the type of element and measure the concentration of that element in the sample. An important point in working with a quantum meter is to determine the basic element, that is, the element that has the highest percentage in the sample. Because each device has limitations in terms of the type of base element, for example, some types of devices are only capable of testing parts that have the base element Cu, Fe, and Al. To determine what the basic elements of each part are, it can be provided from the specifications provided by the person who prepared the sample, or in cases where it is not easy to identify, by placing the sample on the device and performing tests and checking the data obtained from the device, an element can be determined. which has the most presence in the piece (basic element) considered it as the basic element.
Applications of quantum analysis
Identification of TRACE elements
Identify unwanted elements
Non-destructive quantum testing
Measurement of lead content in leaded rice
Determining the amount of soluble and insoluble aluminum in steel
Analysis and investigation of all types of cast iron, such as gray cast iron, ductile cast iron, etc.
Identifying and determining the amount of hydrogen, oxygen, and nitrogen in titanium
Identification of metal materials and their compliance with common commercial standards and alloys
Analysis and review of all kinds of aluminum alloys such as aluminum alloys, lithium
Identification and measurement of phosphorus, sulfur, and thallium elements in nickel base alloys
Identification and measurement of phosphorus, zirconium, and antimony elements in copper base alloys
Identification and measurement of nitrogen element in steels and alloy steels, stainless and refractory
Identification and measurement of phosphorus, strontium, boron, and titanium elements in aluminum base alloys
Determining the chemical composition by quantitative method destructively or as minimally as possible
Analysis of all types of steels, including alloy steels, high manganese anti-wear steels, simple carbon steels, etc.
Considering that Persian Gulf Steel Profile Company has the ISO 9001:2015 certificate, to continue and improve the quality management system, it is necessary to plan and work properly to improve and evaluate the effectiveness of the system. . Therefore, the quality control unit tries to create a regular framework for the company’s activities by preparing a written program of internal audits, monitoring the existing processes, the feasibility of improving the systems and using specialized software.