The study of the structure of smelted metals plays an important role in the production of precision alloys. This makes it possible to produce materials that fully comply with state standards and the high requirements of customers.
Regular quality control is required to ensure the reliability and durability of steel products. One of the important methods of this control is to determine survivability. It is used to test heating elements from precision alloys with high electrical resistance. The essence of the method is to determine the survivability of the material by heating it to a predetermined temperature and then cooling it until the metal surface darkens. Below we will discuss this and other methods of quality control in detail high-precision steels.
One of the important parameters that should be monitored when producing precision alloys is survivability. It determines the ability of a material to maintain its mechanical and electrical characteristics under various loads and operating conditions. The method for determining survivability is a procedure where parts made of produced alloys are subjected to cyclic heating and cooling. This makes it possible to assess the alloy's resistance to thermal effects and determine the tensile strength. The time elapsed before the test sample burns out is an indicator of this limit.
In addition to determining survivability, fatigue tests are carried out. They make it possible to calculate the endurance limit of the material by repeating the maximum stress cycles. The number of cycles in which material fatigue does not occur due to repeated deformations (torsion, compression, stretching, bending) makes it possible to set the alloy's endurance limit.
Precision alloys are mainly used in conditions where even a slight deviation from the chemical composition established by GOST can lead to changes in physical and mechanical characteristics under specified operating conditions. Spectroscopic research methods, in particular X-ray fluorescence analysis, are used to determine the chemical composition of the material. This makes it possible to accurately determine the content of each element in the alloy, which allows maintaining a high quality standard.
Monitoring the metal structure and identifying defects is another important aspect of determining the quality of metals produced. For this purpose, metallographic equipment is used that makes it possible to study the microstructure of the material under a microscope and identify porosity, shrinkage shells and various non-metallic inclusions. Additionally, ultrasonic and eddy current techniques are used to detect cracks, voids and other structural defects that can reduce the strength and reliability of alloys.
For most precision materials, their electrical and magnetic properties. These parameters are determined using standard physical tests, which include:
As part of measuring electrical resistance, the difference in electrical resistances within one coil is calculated by measuring this parameter at the beginning and end of the test samples.
General quality control produced by the plant PZPS precision alloys include not only the methods described, but also many other tests, including:
All these control methods allow create materialsthat meet the highest quality standards and the requirements of modern industry. Thanks thorough research At each stage of production, the St. Petersburg Precision Alloy Plant can guarantee the accuracy of the characteristics of its products and the compliance of their chemical composition with the applicable GOSTs and specifications.
