When brown spots appear on the surface of A242 Type1 weathering plate, people will exclaim, "This must be a fake, A242 Type1 weathering plate will not rust." In
Pay attention to the following points when welding Q265GNH weathering steel:
1.Select the appropriate welding material and welding process. Q265GNH steel contai
·Good corrosion resistance: Q265GNH steel contains more copper, chromium, nickel and other alloying elements, which can form a dense passivation layer to
The continuous casting process is fully protected, and steel plate mold slag for container steel is added to the crystallizer.Q265GNH steel is prone to breakout
Since Q390 steel is a low-alloy high-strength steel, when welding high-strength steel, generally the material with the same strength as the base metal should be
Q390 steel has excellent comprehensive mechanical properties, excellent weldability, cold and hot workability, and corrosion resistance. In addition, Q390 steel
Submerged arc welding is a kind of high-efficiency welding method, and the most widely used in actual production is twin-wire submerged arc welding. For the Q39
According to the sources, the inclusions in X65 pipeline steel can be divided into two categories: endogenous and exogenous. Among them, the endogenous inclusio
Inclusions in X65 pipeline steel mainly exist in the form of non-metallic compounds, such as oxides, sulfides, nitrides, etc. Non-metallic inclusions have a gre
The performance of X65 pipeline steel mainly depends on its chemical composition and structure. Inclusions in X65 pipeline steel mainly exist in the form of non
The thickness of NM550 steel plate is usually between 6-80mm, and the common specifications are 8mm, 10mm, 12mm, 16mm, 20mm, 25mm, etc. Different thicknesses ar
(1) Preheating measures are taken before welding to ensure that the preheating temperature of NM550 wear-resistant steel plate is ≥ 200 °C.(2) The NM550
NM550 wear plate has excellent cutting performance. Due to its high hardness, carbide tools and tool coatings are required for cutting to ensure cutting efficie
30CrMnSi steel has good mechanical properties and good weldability because it does not contain the rare element nickel, and is widely used in steel parts for sh
The heat treatment process of quenching between Ac1 and Ac3 is called sub-temperature quenching. Sub-temperature quenching can improve the impact performance of
1. Material preparation
First of all, it is necessary to test the chemical composition of 30CrMnSi steel to ensure that it meets the requirements of relevant st
Due to the sensitivity of S700MC steel to high temperature, what is the advantage of lowering the rolling temperature for S700MC steel during hot rolling?(1)Red
When building rail vehicles, during the process of processing, assembling, and welding the components of each part of the car body, due to the existence of stre
1. S700MC steel plate is a low-alloy high-strength steel plate. S700MC steel plate has excellent performance, high strength, good welding performance, and S700M
Quenching can improve the plasticity and toughness of 35CrMo steel and reduce its brittleness, but it often inevitably reduces the strength and hardness of 35Cr
35CrMo steel belongs to pearlitic heat-resistant steel. It is mainly composed of chromium and molybdenum alloying elements. The alloying element chromium can fo
Carburizing is a heat treatment process in which steel is placed in a medium with sufficient carbon potential and heated to an austenite state and kept warm to
For the rolling of 35CrMo steel plate, the following standard requirements need to be met:
(1) Deviation requirements for thickness, width and length
The thickn
1. Cracks appear on the surface of 35CrMo steel after carburizing
Reason:
a.The concentration of surface penetration layer for 35CrMo steel is too high.
b.35CrM
35CrMo steel is a heat-resistant steel with pearlite structure, which has high thermal strength (δb≥440MPa) and oxidation resistance at high temperatur
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