Skip to main content

Advances in Steel Will Drive Quality Improvement of Welding Material

Advances in Steel Will Drive Quality Improvement of Welding Material

The traditional alloy structural steel is to adjust the content of carbon and alloying elements in the steel and is equipped with appropriate heat treatment to achieve various superior performances, and is used for manufacturing welded structures under different application conditions. However, the general trend is that as the content of carbon and alloying elements increases, the strength increases, the weldability of the steel deteriorates, and the weldability problems of different steel grades vary. In the alloy structural steel, as the content of carbon and alloying elements increases, it tends to cause brittleness, softening and cracking tendency of the joint.
Due to advances in iron and steel smelting and rolling processes, various low-alloy high-strength steels such as building structural steel, shipbuilding steel platepressure vessel steel, pipeline steel, bridge steel, heat-resistant steel and low-temperature steel all tend to the development of low carbon, ultra-low carbon, micro-alloying, clean, fine-grained direction.
Development of new welding materials for advanced pipeline steel include cellulose down welding rod, low hydrogen iron powder type down welding rod, solid welding wire for gas protection and submerged arc, self-shielded flux cored wire, and welding materials matched with high-strength steel such as fire resistance and weather resistance, etc. The welding materials also include high-strength and high-toughness welding rods, solid welding wire and flux-cored welding wire suitable for high-strength thick plates for large oil storage tanks, pressure vessels, bridges and building structures.

Comments

Popular posts from this blog

30 LB RAIL FOR SALE

  30 LB RAIL FOR SALE What is a 30 lb rail? A 30 lb rail refers to a rail weighing 30 lb in meters, which is an ASCE 30 model rail produced according to ASTM A1. As a common light track, it is mainly used for laying mining track lines. Therefore, it is widely used in the South American market. The dimensions of the 30 lb rail are as follows: Head width: 42.9mm Track height: 79.4mm Track bottom width: 79.4mm Waist thickness: 8.4mm GloryRail is an important  mining rail  supplier in China. Engaged in rail supply for more than 20 years. Rail products are exported to many countries and regions around the world. Trusted and supported by many mining customers. We maintain long-term cooperative relationships with many important customers in Peru, Colombia, Panama, and Venezuela in South America BUY 30 LB RAIL FROM CHINA As the world’s most important rail tracks production base. There are six major steel mills in China producing rails with an annual output of millions of tons. G...

Rail clip installation

Rail clip installation rail clip installation Prerequisites for the rail clip installation 1. The rail presser is installed after the steel beam on the crane rails surface is adjusted; 2. The steel beam of the crane must be 3. The rail pressure device should be installed; 4. Before the installation of the  rail clamp , the surface paint of the crane beam is finished and meets the requirements of the current regulations; 5. Before the installation of the rail presser, the track joints should be connected, and the track joints and side bending deviations should meet the requirements of “Steel Structure Engineering and Acceptance Specifications”-83). 6. The welding of the base plate control plate and the steel suspension beam should meet the design requirements. Installation sequence and essentials A. Welding the fixed base, the fixed base can be used, the three grooves on the surface and the position of the rail presser can be positioned, and the allowable deviation of the position ...

What are railway rail fasteners?

What are railway rail fasteners? Railway rail fasteners Railway rail fasteners are a kind of railway accessories. The parts used to combine rails and sleepers (or other types of under-rail foundations) on the track are also called central joint parts. Its function is to fix the steel rail on the sleeper, maintain the gauge and prevent the longitudinal and lateral movement of the rail relative to the sleeper. The railway rail fastener system is divided into the shrapnel fastener system, gusset fastener system, and elastic strip fastener system. The gusset-type fastener is composed of a gusset plate, a threaded spike, a spring washer, an iron seat, and a buffer pad. The threaded spike is anchored in the reserved hole of the concrete sleeper bearing platform with sulfur cement mortar, and then bolts are used to fasten the buckle. Plate fastened. There are elastic strips I, II, and III types of clip fasteners. Type I elastic strip is composed of ω elastic strip,  screw spike , gauge b...