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Ordinary carbon steel Q345B and S355JR and weathering steel Q255GNH were placed in a non-specially humid environment indoors to investigate their weathering performance. When Q345B and S355JR were placed for 1 week, rust began to appear on the surface; wh
By studying the uniformity of deformation between racks and the uniformity of laminar cooling, it is analyzed that the main reason for the poor shape of SPHC weathering steel plates is the uneven cooling of laminar flow.
The microstructure of the weld zone of S355J2W steel welded joints air-cooled is composed of coarse columnar ferrite, network ferrite, acicular ferrite and a small amount of pearlite, and the microstructure of the heat-affected zone is composed of fine an
The test material is 12mm thick S355J2W weathering steel, using MAG welding (melting electrode active gas shielded arc welding) multi-layer multi-pass welding process, the shielding gas is 80% Ar+ 20% CO2 mixed gas, the joint form is butt joint, V-shaped
For the Corten B weathering steel experiment, under the same corrosion environment and the potential difference between grain boundaries and grains, compared with samples with larger grain sizes, the k value of the sample with smaller grain size Smaller,
The requirements for environmental protection of steel structure buildings are increasing at home and abroad, and the surface treatment technology of S355J2WP weathering steel should also be developed towards environmental friendliness. Therefore, BBN pro
In the natural environment, S355J2WP weathering steel can use the protective and stable rust layer generated by itself to prevent further corrosion, so as to realize bare use, omit the traditional paint coating process, and maintain free in the later stag
The matrix structure of A588 Grade A weathering steel plate has a great influence on the corrosion performance, and the multiphase structure should be avoided as much as possible. The more uniform and single the structure, the better the corrosion resista
A588 Grade A weather-resistant steel plate refers to the addition of a small amount of alloying elements such as Cu, Cr, Ni, etc. to ordinary low-alloy steel, so that an amorphous oxide layer with a dense layer and strong adhesion to the base metal is for
When the stack cooling Q235NH steel plate is cooled from high temperature after rolling, the thermal stress caused by the inconsistency of the internal and external cooling rate is inconsistent with the internal and external phase transformation during th