Brief introduction of metal cooling treatment for construction fasteners

Introduction of metal fasteners for building fasteners

The cooling of the building fastener is also an indispensable step in the heat treatment process. The cooling method varies with the process, mainly to control the cooling rate. The general cooling rate is the slowest, the normalizing cooling speed is faster, the cooling speed is faster But also because of different steel and have different requirements, such as empty hard steel can be the same as the normal cooling rate of hardening.

The construction fastener is made of two sub-fasteners. The lower part of each sub-fastener is connected with the movable joint bolts. Clearance and thrust surface of the fastener on the connection between the two sub-threaded rivet coupling, and any angle of rotation. This model has a substantial feature of the fastener and significant progress, so that parts to reduce the number of parts to reduce costs , And because of its own material flanging thickness is greater than the thickness of hollow rivets, it increases the tensile strength, torque and rigidity greatly improved, compared with the traditional building fasteners, more secure and reliable, the structure of the fastener structure strength Better than traditional building fasteners.

There are many things to note about the use and characteristics of construction fasteners and anti-skid construction fasteners, but the demand for these two fasteners will usher in a new period for the current domestic and international demand markets.

Metal heat treatment process can be divided into the overall heat treatment, surface heat treatment, local heat treatment and chemical heat treatment, etc. According to the heating medium, heating temperature and cooling methods, each category can be divided into a number of different heat treatment process. Different heat treatment process, can be obtained in different organizations, which have different performance. Iron and steel industry is the most widely used metal, and steel microstructure is also the most complex, so a wide range of steel heat treatment process.

The whole heat treatment is the heat treatment process of the whole body which is heated by the whole workpiece and then cooled at the appropriate speed to change its overall mechanical properties.The steel heat treatment is basically the basic process of annealing, normalizing, quenching and tempering.

The annealing of the building fastener is to heat the workpiece to the appropriate temperature, according to the material and the workpiece size using different holding time, and then slow cooling, the purpose is to make the internal organization of metal or close to equilibrium, access to good process performance and performance, Or for further quenching for the preparation of the normalizing is the workpiece heated to the appropriate temperature in the air after cooling, normalizing effect similar to annealing, but get the organization more thin, often used to improve the cutting performance of materials, and sometimes with In some of the less demanding parts as the final heat treatment.