Chris Na

 1. Stoma     This is a small cavity formed by the gas that has not escaped during the solidification process of the metal. Its inner wall is smooth, contains gas, and has a high reflectivity to ultrasonic waves, but because it is basically spherical or ellipsoidal, That is, it is a point-shaped defect, which … Read more

    Carburizing and quenching is actually a composite process, namely carburizing + quenching. We are often used to talk about the two together, because the two processes that are completed on the same equipment are the most commonly encountered in production (but there are also carburizing air cooling, carburizing slow cooling and then reheating … Read more

 1. Graphitization process of cast iron     The formation process of graphite in cast iron is called graphitization process. The basic process of the structure of cast iron is the formation process of graphite in cast iron. Therefore, it is very important to understand the conditions and influencing factors of the graphitization process to … Read more

 The 690 alloy tube used for the steam generator heat transfer tube of nuclear power plant bears the corrosion of high temperature, high pressure and water medium, alloy grain size, intergranular Cr depletion, intergranular carbide and its force on stress concentration. The academic effect is an important factor that affects the intergranular corrosion and stress … Read more

   Duplex stainless steel has the same proportion of ferrite and austenite, and has excellent mechanical properties and corrosion resistance. It is widely used in petrochemical, transportation, marine engineering and other fields. 2205 duplex stainless steel is a typical representative of the second generation of duplex stainless steel, and the proportion of global production and … Read more

 1. 45-high-quality carbon structural steel, the most commonly used medium-carbon quenched and tempered steel Main features: The most commonly used medium carbon quenched and tempered steel, with good comprehensive mechanical properties, low hardenability, and easy to crack during water quenching. Small parts should be quenched and tempered, and large parts should be normalized. Application examples: … Read more

     In this type of enterprise, the employees are tired, and the boss is even more tired. They are all working hard for the future of the company, and they have also thought of many new methods, but the results have been minimal. Due to its “top-down” management model, traditional enterprises will inevitably lead … Read more

Calculation Formula The calculation formula for the selection of die-casting machine: Die-casting machine clamping force (t) = 1.4 * casting projected area * ratio of the projected area of ​​the die casting-the orthographic projected area of ​​the die casting * modulus (CM2). The tonnage of the die-casting machine is indicated by the clamping force of … Read more

 Any corporate meeting should look like a lady’s skirt, the shorter the better. In fact, many corporate meetings are like shrouds, long and useless, and the biggest effect is a waste of time. And time is also the most important cost of an enterprise. Regarding the super-large enterprises and state-owned enterprises, I don’t need to … Read more