Glorysteelwork

Effect of Multiple Quenching and Tempering on SCM440 Steel Properties Due to the harsh work environment of marine machinery, it is often used at low temperatures (≤ -20 °C), and at the same time it is subjected to very large loads, which imposes certain requirements on the low-temperature impact properties of material. When the total surface area of the grain boundary increases, the concentration of impurity segregation at the grain boundary will decrease, the harmful effect will decrease, and the brittle transition temperature may decrease. Since the grain size is inversely proportional to the total grain boundary area, refining the grains can improve the low temperature impact toughness of the material. The main purpose of the quenching and tempering heat treatment is to adjust the structure, reduce the carbides, obtain the Sorbite or Sorbite structure  and the granular carbide structure with uniform distribution to improve the overall performance. Studies have shown tha...

Welding Process about Low Carbon Steel and Low Alloy Steel The welding of low carbon steel and low alloy steel belongs to the welding of dissimilar metal materials. The welded structure of dissimilar steel is not only economical and reasonable, but also saves valuable materials and improves the performance of the components. Welded structures made of dissimilar metals are increasingly used in modern machinery, chemicals, power, and mining. According to the metallographic structure, low carbon steel and low alloy steel belong to pearlitic steel, and these two kind of dissimilar steel welded structures are used in practice. Low carbon steel has excellent weldability and low steel cost.  S355JR steel  is a kind of low carbon steel. Glory Steel could offer  S355JR steel  as crane rail. Ordinary low-alloy steel is added small amount of alloying elements (mass fraction not exceeding 3%) based on carbon steel to make the microstructure of carbon steel change, ...

JFE Steel Will Increase Steel Price to Cope with Mining Cost Pressure Japan’s JFE Steel warned that the company will share some of the raw material cost pressure to downstream users by raising the price of finished steel to maintain the company’s profit level. Last month, iron ore prices once reached the highest point in nearly five years. JFE Steel Chief Financial Officer Masashi Terahata said in an interview. “Although there are certain bottlenecks in the current raw material supply market, we can still purchase iron ore and produce finished steel products in the short term. The current main problem is price. In this fiscal year, the company need reflect the cost pressure of iron ore prices and other expenses on our steel prices.” Even though the iron ore price increases, Glory Steel will offer reasonable price for customers to support them to get high quality steel products, like  hot rolled steel plate ,  hot rolled steel square bar , etc. JFE Steel is also worr...

Glory Steel Supply High Quality T Shaped Steel for Elevator At present, the manufacturing requirements of elevator guide rail products are increasingly inclined to high precision, high speed and high smoothness, which puts higher technical requirements on the elevator guide rail steel industry. Glory Steel could offer profile steel bar and special  T-shaped steel bar  for elevator guide rails. For example, Glory Steel’s main products  S45C hot rolled steel square bar  and  SS400 hot rolled steel flat bar  offer great support for back-end precision elevator manufacturing projects, like high-speed elevator rail market. The elevator guide rail is a safety rail that runs up and down in the hoistway. The guide rail is installed on the hoistway wall, and is fixedly connected to the hoistway wall by the rail bracket. The commonly used guide rails for elevators are T shaped guide rails. The T shaped steel bar produced by Glory Steel has strong rigidi...

Study on Cooling Method of SUP9 Spring Flat Steel Hot rolled spring flat steel bar is mainly used for the automotive industry, and it’s the raw material for automobile leaf spring  manufacturing. The main varieties of spring steel include 60Si2Mn spring steel,  SUP9 spring steel flat bar , 55SiMnVB spring steel. SUP9 spring steel flat bar is produced in accordance with the Japanese standard. At present, many leaf spring manufacturers mostly use SUP9 spring steel as the raw material for manufacturing automotive leaf springs. Compared with 60Si2Mn, SUP9 spring steel has good hardenability and low decarburization tendency, so the mechanical properties and fatigue properties of the leaf springs produced with SUP9 spring steel are better than that of 60Si2Mn steel. However, due to the good hardenability of  SUP9 steel , the hardness is often too high during actual rolling production and cooling. The reheating, quenching and tempering treatment are carried out in...

Application of S45C Steel Rapid Tempering and Quenching Process S45C steel  is widely used in machinery manufacturing. S45C carbon steel is a kind of commonly used medium carbon tempered structural steel, like  S45C carbon steel square bar . Normalizing can improve the cutting performance of less than 160 HBS blanks. After the steel is quenched and tempered, its comprehensive mechanical properties are superior to other medium carbon structural steel. Quenching and tempering treatment is a common heat treatment process for S45C steel. To this end, we have studied S45C steel quenching and tempering process. The mechanical properties of the quenched and tempered parts subjected to rapid tempering were tested for hardness of 27 times on different sections of 55 mm effective thickness. The maximum hardness difference was 9 HB units and the uniformity was good. The following items should be noted in the process specification: Firstly, the capping temperature shoul...

Experimental Study on Steel Mechanical Properties at High Temperature A more accurate understanding of the mechanical properties of structural steel at high temperatures is the basis for the analysis of steel structure response under fire.  S45C carbon steel square bar  is a kind of structural steel. Glory Steel Work could offer structural steel like,  S20C steel , S45C steel, etc. Foreign countries have done a lot of researches on the mechanical properties of structural steel under high temperature. However, due to different test methods (steady state test and transient test), different accuracy of test equipment and measurement technology, and different control mode and control selected parameters during the test with the complex effects of creep factors, there will be certain differences in test results. The structural models used in different theoretical analysis of structural fire resistance response and the calculation of various parameters are also quite d...