On May 30, 2007, the company added a large-scale automatic oil quenching heat treatment production line. After intensive commissioning, it was successfully put into operation half a month ahead of the original plan. The production capacity of this oil quenching production line is very few in Ningguo, reaching the scale of 20 tons per shift, which indicates that Xinma company has stepped up a new level in product quality assurance than before. Compared with the previous air quenching heat treatment of the company, the use of oil quenching production line makes the hardness and uniformity of products reach a new height, and the hardness and toughness are maintained at a more reasonable intersection point, which can greatly reduce the use cost of customers.