| Abstrakt: |
1.The proposed method of production of die casting dies causes a six to seven times increase in their life and the design strength (thermal erosion resistance, oxidizability, interaction of the mold metal with the molten alloy,toughness and resistance of the metal to plastic deformation) of certain of the steels (20Kh13, 5KhNM, etc.) increases by up to 10 times.2.The volumetric preliminary and accompanying compressive stresses created in the dies cause slowing of development of thermal erosion. The preliminary compressive stresses may be calculated by the finite element method with the use of the computer, which makes it possible to predict the degree of thermal erosion.3.For built-up stressed dies the use of steels with a reduced alloy content and with an increased coefficient of thermal expansion such as 20Kh13, 4Kh5MFS, and 5KhNM is possible.4.The new method and investigated steels are intended for production of dies in any branch of machine and automobile and tractor building. |
Full text from SpringerLink