Annealing, hardening and heat treatment of alloy tool steel
Are you interested in annealing, hardening of alloy tool steel? The supplier Evek GmbH offers to buy any quantity of alloy tool steel at an affordable price in a wide range. We provide delivery of products anywhere in the continent. The price is optimal.
Relevance
Annealing is used to obtain the equilibrium structure of tool alloy steels. There are the following varieties of this operation: Evek GmbH offers to buy alloyed structural steel at an affordable price in a wide range. We provide delivery of products to any point of the continent. The price is optimal.
| Types of annealing | Technical feature |
| Recrystallization | Heating is carried out at temperatures of 720 ... 770°С, as a result of which the cladding obtained after cold deformation is removed. |
| Full | Heating is carried out to temperatures of 780 ... 850°С. After that the steel is kept until it is fully heated, and slowly cooled to 500 ... 600 ° C. Further cooling rate can be any. As a result, internal stresses are removed and the initial structure of steels is corrected, which becomes fine-grained. |
| Incomplete | This is used to prepare the product for subsequent hardening, and to reduce the hardness. The temperature of such annealing must correspond to the temperature range of the transformation of pearlite into austenite; |
| Isothermal | Similar to the full annealing but at a higher rate. Alloy tool steels are annealed at temperatures of 700...750°С to the final hardness of 200...250 NV; |
| Diffusion . | Necessary for obtaining a homogeneous structure in large hammer dies. Cooling of alloyed tool steels after annealing can be carried out according to two schemes. According to the first one, firstly, cooling is carried out with the furnace at reduced speeds and then in air. The second scheme includes isothermal soaking, cooling with the furnace, and then - in calm air. |
| Grain perlite annealing. | It is used to decrease the hardness and increase the machinability of tool carbon steels. This annealing has cyclic nature: periodically the temperature of heating changes from 680 ... 690°С to 730 ... 740°С. The products are cooled down together with the furnace; |
Hardening .
Modes of hardening depend on the chemical composition of tool alloy steels, the level of its physical and mechanical properties and the configuration of the product. A distinction is made between:
| Types of hardening | Technical characteristics |
| Full | Heating occurs above the austenitic transformation temperature. Depending on the cooling rate, the steel structure may be martensitic-austenitic or, at lower temperatures, sorbitic and troostitic. |
| Isothermal | Steel is heated slightly above normal temperatures and cooled in oil or molten salts until the austenite has completely disintegrated. In this process, the residual stresses and warpage of complex tools are reduced; |
| Stepwise | The transformation of austenite to martensite occurs as a result of alternate cooling/heating in the austenite-perlite transformation zone. Cooling is performed in a hot environment, and then in air. |
To improve the quality of quenching, it is worthwhile to carry out it in furnaces with controlled atmosphere. After quenching, tempering is carried out, during which internal stresses are eliminated. The hardness is somewhat reduced, but at the same time the brittleness of the steels in question is reduced.
Buy. Furnizor, price.
Are you interested in annealing and hardening of alloy tool steels? Supplier Evek GmbH offers to buy alloy tool steel in any quantity at the manufacturer's price. We provide delivery of products anywhere in the continent. The price is optimal. We invite to partner cooperation.
