Flat Thread Rolling Die For Bolts And Screws  

Product Description GB / T 972 "Thread rolling plate" standard stipulates that the thread rolling plate is made of 9SiCr, Cr12MoV steel, the hardness of the working part is 59 ~ 62HRC, if> 62HRC is easy to collapse, <59HRC is easy to wear; quenched martensite <3; There should be no decarburization and low hardness on the working surface; there should be no defects such as cracks, nicks, rust and grinding burns on the surface of the thread rolling board. According to the working conditions of the thread rolling board, the selected materials should have the following properties: (1) Good hardenability, high matrix hardness and good wear resistance; (2) Good dimensional stability; (3) Good impact toughness and appropriate strength; (4) Good machinability and hot workability.    Henghui will choose the suitable carbide materials of pr…