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利用ANSYS10.0,对铸件表面硼化物梯度耐磨材料成形过程中温度场进行了模拟验证,对梯度耐磨材料不同部位的成形机制进行了分析研究,结果表明,模拟结果与试验结果较为吻合,合金粉块不同部位温度变化将影响复合材料的质量,内层及中间层温度高,高温持续时间长,熔合质量好,而对于最外层,温度较低(<1000℃),高温持续时间短,尖角处温降快,导致这些部位复合材料熔合质量较差、缺陷较多。进一步研究表明,砂型材料的导热率及合金粉块内低熔点的熔合剂过多均会影响复合材料的质量。
The temperature field during the forming process of boride gradient wear-resistant material on casting surface was simulated by ANSYS10.0. The forming mechanism of different parts of gradient wear-resistant material was analyzed. The results show that the simulation results are in good agreement with the experimental results, The change of temperature in different parts of the alloy powder will affect the quality of the composites. The temperature of the inner and middle layers is high, the duration of the high temperature is long and the quality of the fusion is good. For the outermost layer, the temperature is low (<1000 ℃) , Sharp corner temperature drop, resulting in poor fusion quality of these parts of composite materials, more defects. Further studies show that the thermal conductivity of sand-based materials and alloy powder lumps of low-melting point too much will affect the quality of composite materials.