Zhengzhou Guoyun Electronics Technology Co., Ltd. celebrated the Spring Festival of 2012 with a ceremony to bid farewell to the old and welcome the new. At nine in the morning, as the national anthem of the People's Republic of China sounded, the programs celebrating Guoyun's growth together with us unfolded one by one. First, our chairman Zhang Mingyu delivered a speech on the growth experience of Guoyun and its future development prospects, including the quenching equipment for machine tool guides. The program that I will never forget was selected by the sales department of Zhengzhou Guoyun Electronics, written by several sales managers of our company after a day and night of effort, finally completed satisfactorily. I would like to share it with everyone.
***I left my small county, suffering from hunger all the way. To sell Guoyun's heating power supply, my life has changed ever since. In Guoyun, I have been working hard. Customers have been纠缠when buying machines. The technical department provided strong support with sensors. Finally, in 2011, I achieved great success. No longer will I be looked down upon by friends, no longer will I let my parents worry at home, no longer will I let my tearful mother worry, no longer will I let my weathered father endure heat and cold. Engineer Zhang, when will our company go public? Next year, soon I will enter the circle of rich people. I will work hard and strive to double the sales next year. Praise Guoyun, thank Guoyun, we grow together with Guoyun. www.guoyunwu.com, Zhengzhou Guoyun official website.
The quenching process is widely used in modern machinery manufacturing industry. Important parts in machinery, especially steel parts used in automobiles, airplanes, and rockets, are almost all treated with quenching. To meet various parts' vastly different technical requirements, various quenching processes have developed. For example, according to the treated part, there are whole, partial, and surface quenching; according to whether the phase change is complete during heating, there are complete quenching and incomplete quenching (for hypo-eutectoid steel, this method is also called subcritical quenching); according to the content of phase change during cooling, there are分级quenching, isothermal quenching, and sub-cooling quenching, etc.