Producing austenite-containing fine-dendritic cast steel exhibiting increased transformation induced plasticity or twinning induced plasticity properties with an equivalent value for the stacking fault energy (W) of the austenite of less than 55 mJ/m 2, comprises blowing species-characteristic particles (5 mass%) having a particle diameter of less than 150 mu m with inert gas, into the casting stream during casting. Producing austenite-containing fine-dendritic cast steel exhibiting increased transformation induced plasticity or twinning induced plasticity properties with an equivalent value for the stacking fault energy (W) of the austenite of less than 55 mJ/m 2, corresponding to the relation W[mJ/m 2] is equal to 230 percentage of carbon minus 54 percentage nitrogen minus 0.1 percentage chromium plus 2 percentage nitrogen minus 4 percentage silicon plus 0.1 percentage molybdenum minus 1 percentage manganese minus 0.6 percentage cobalt plus 0.4 percentage aluminum plus 4 percentage copper plus 3 percentage niobium, comprises blowing species-characteristic particles (5 mass%) having a particle diameter of less than 150 mu m with inert gas, into the casting stream during casting. INDEPENDENT CLAMS are also included for: (1) the austenitic cast steel part produced by the above method, where the cast steel at room temperature exhibits 0.2% yield strength of 200-450 MPa, a tensile strength of 600-900 MPa, a necking of 70-100% and an elongation at break of 50-100%, and the product of tensile strength and elongation at break has a value of 45000-60000 MPa%; and (2) a austenitic-martensitic cast steel part produced by the above method, where the cast steel at room temperature exhibits 0.2% yield strength of 300-800 MPa, a tensile strength of 800-1600 MPa, a necking of 20-70% and an elongation at break of 10-60%, and the product of tensile strength and elongation at break has a value of 16000-48000 MPa%.
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机译：生产具有增加的相变诱发塑性或孪晶诱发塑性特性的奥氏体细枝状铸钢，奥氏体的堆垛层错能（W）的当量值小于55 mJ / m 2>，包括吹塑物种特征颗粒在铸造过程中，将具有小于150μm的粒径（5质量％）的惰性气体引入惰性气体中。生产具有增加的相变诱发塑性或孪生诱发塑性特性的含奥氏体的细枝状铸钢，奥氏体的堆垛层错能（W）的当量值小于55 mJ / m 2>，对应于关系W [ mJ / m 2>]等于230％的碳减去54％的氮减去0.1％的铬加上2％的氮减去4％的硅加上0.1％的钼再减去1％的锰再减去0.6％的钴加上0.4％的铝加上4％的铜加上3％的铌包括在铸造过程中用惰性气体将粒径小于150μm的物种特征颗粒（5质量％）吹入铸造流中。还包括以下方面的独立要求：（1）通过上述方法生产的奥氏体铸钢零件，其中室温下铸钢的0.2％屈服强度为200-450 MPa，抗拉强度为600-900 MPa，缩颈拉伸强度和断裂伸长率的乘积为70-100％，断裂伸长率为50-100％，其值为45000-60000 MPa％。 （2）通过上述方法制造的奥氏体-马氏体铸钢零件，其中，室温下的铸钢的0.2％屈服强度为300-800MPa，抗拉强度为800-1600MPa，颈缩为20-70。 ％和断裂伸长率为10-60％，拉伸强度和断裂伸长率的乘积的值为16000-48000MPa％。
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