Austenitic hot work die steel
A technology of hot work die steel and austenite, which is applied in the field of iron and steel metallurgy to achieve the effect of good thermal stability and stable hardness
Inactive Publication Date: 2014-05-21
无锡市森信精密机械厂
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Problems solved by technology
Therefore, there is still room for improvement
Method used
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Experimental program
Comparison scheme
Effect test
Embodiment 1
[0015] An austenitic hot work die steel, which consists of the following components in weight percentage: C 0.3%, Si1.1%, Mn7.0%, Cr 7.5%, Ni3.5%, Mo 0.8%, V 0.5%, Zr 0.2%, P<0.02%, S<0.005%, N 0.15%, Fe balance.
Embodiment 2
[0017] An austenitic hot work die steel, which is composed of the following components in weight percentage: C 0.7%, Si 0.5%, Mn 8.0%, Cr 6.5%, Ni 4.5%, Mo 0.6%, V 2.0% , Zr 0.1%, P<0.02%, S<0.005%, N 0.30%, Fe balance.
Embodiment 3
[0019] An austenitic hot work die steel, which consists of the following components in weight percentage: C 0.4%, Si 0.9%, Mn 7.3%, Cr 7.2%, Ni 3.8%, Mo 0.75%, V 0.8% , Zr 0.17%, P<0.02%, S<0.005%, N 0.20%, Fe balance.
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The invention discloses an austenitic hot work die steel. The die steel comprises, by weight, 0.3 to 0.7% of C, 0.5 to 1.1% of Si, 7.0 to 8.0% of Mn, 6.5 to 7.5% of Cr, 3.5 to 4.5% of Ni, 0.6 to 0.8% of Mo, 0.5 to 2% of V, 0.1 to 0.2% of Zr, less than 0.02% of P, less than 0.005% of S, 0.15 to 0.30% of N, and the balance of Fe.
Description
technical field [0001] The invention relates to the technical field of iron and steel metallurgy, in particular to an austenitic hot work die steel. Background technique [0002] Traditional hot work die steels are all martensitic steels. Although these materials have high hardness and wear resistance, they have a fatal flaw. Most of their service temperatures are below 650°C, that is, they cannot work under high temperature conditions. When the temperature exceeds 650 °C, the martensite matrix decomposes, and recovery softening occurs, resulting in material failure. Compared with the disadvantage of martensitic steel, the matrix of austenitic hot work die steel always maintains a single austenite state no matter under normal temperature or high temperature working conditions, which can avoid the problems of matrix decomposition and recovery softening. As a matrix, austenite has good toughness but low hardness. Generally, by adding alloying elements such as Cr, Mo, V, etc....
Claims
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Inventor 华兆红
Owner 无锡市森信精密机械厂