Study TD Method Infiltrating Cr On Hot-Work Die

Mould technique is not only a important symbol of national product manufacture horizon, but also decide the country's product quality, the benefit and the ability of developing new product to some extent. As the development of the industry, the requirement of the performance of moulds becomes higher and higher, the life question is prominent day by day. Surface strengthening technique plays a very important role in the mould industry, and attracts widely attentions.Salt-bath infiltrating chromium by TD method belongs to one of infiltrating metal, this paper analyze and introduce correlated theory and influence factors, probe into the key point of salt-bath, mold selection effecting the coating performance, and seek one kind surface treatment craft to apply the industrial production. Explore a series of 5CrMnMo, H13, 3Cr2W8V matrix affecting the coating performance, and mainly inspect the different carbon amount as well as the different alloy content influence the coating thickness. We obtain the different temperature work on the typical steel able-coating and the processing layer performance; carbon amount, alloy content and process time infect processing layer thickness.To the low-carbon steel, Solid carburization can enhance resistance to wear, bear the impact of superficial matrix. Mix with the original good plasticity and the tough higher merits, it can obviously enhance the mold service life. But hot work die steel request a higher heat weary and good anti-high temperature oxidability, so some materials which can't carry on TD processing firstly carburize, and then actualize TD processing, which may make mold service life to go a step further. This paper discusses the variational rule of carburization box size, carburization time influence carburization thickness. Study the processing of 1Cr18Ni9Ti and 1Cr13 stainless steel at the different carburization dosage, contrast experiment, and inspect the processing layer spreading situation and the performance test. The conclusion is: a few RE can remarkably urge to infiltrate the coating, and enhance the surface hardness.At the same time, use the instrument analyze the layer ingredient and the structure, and determine different processing parameter influence the metallographic phase under the different craft. The result shows, the processing layer is integrity, achieve the ideal thickness, the surface quality is well, and obtain the good hardness.TD method processing and Solid carburization layer thickness is even, compact, integrity, own extremely high micro-hardness, and integrating force is strong. Achieve remarkable effect apply to hot work die and the components surface strengthening, display hot anti-oxidability and rigidity in high temperature situation, and also have the merit of energy conservation and few environmental damage, so it value to widespread everywhere. Through theory and experimental study, some main problems are solved perfectly. It paves the way from a technique in lab. to application of this surface strengthening method in industry.