2. Selection of welding wire and flux
(1) The welding wire is mainly selected as the filler metal to add alloy elements to the weld and directly participate in the metallurgical reaction in the welding process. Its chemical composition and physical properties not only affect the stability in the welding process, the performance and quality of the welding joint, but also affect the welding production rate.

The market of spherical compensator is short. Watch out for the device when axial compensation of propulsion force is needed
The impact of the 15 year economic downturn led the steel industry to a low point, and the spherical compensator was not very prosperous in the market. In recent years, the economy has been rising from time to time, and the market for spherical compensators has also turned around. Today, let's briefly analyze the macro situation of the market for spherical compensators.
Spherical compensator
At present, China's iron and steel industry lacks independent innovation and original creativity, and the central technology is still in the pursuit period. As a result, most spherical compensator varieties cannot fully meet the needs of the steel industry, and the compensator market lacks driving force. The main performances are as follows:
1) The contradiction between excess capacity and demand is outstanding, which is not conducive to the balance of supply and demand in shopping malls;
2) The decline of the company's benefits is not conducive to the development of vitality of the progressive economy;
3) The commodity price of ball type compensator fell too fast.
In order to completely change the rigid market situation at that time, it is necessary to start from adjusting the industrial structure, improve the technical content of compensator products, accelerate industrial upgrading, and strengthen the competitiveness of all professions.
Corrugated compensator is a disturbing element centered on the bellows, which can be used for axial, transverse and angular compensation on the pipeline. In order to reduce the self-excited phenomenon of the medium, the axial compensator is equipped with an inner sleeve inside the product, which limits the ability of radial compensation to a large extent, so it is generally only used to absorb or compensate the axial displacement of the pipeline (if a small amount of radial displacement is really required in the pipeline system, it can also absorb the combination of axial, angular and arbitrary displacement; hinge compensator (also called angular compensator) Compensator, which is used together with two or three compensators (single hinge compensator has no compensation ability) to absorb transverse deformation in a single plane; Universal hinge (angular) compensator, used by two or three matching, can absorb three-dimensional deformation.
When axial compensation is required in the pipeline, we often choose to use the direct buried corrugated compensator. Because of its large compensation amount, stable performance and simple operation, this equipment has won the trust of many customers. Because many customers always neglect the details of the device, which leads to the application effect of the product, our company summarizes the precautions of its device here today.
The directly buried corrugated compensator is mainly used for axial compensation, and has super bending resistance, so the influence of pipeline subsidence is not considered. The self expansion compensation is completed under the maintenance of corrugated compensator shell and guide sleeve, and other performances are the same as those of ordinary corrugated compensator.