CAJ | 학술논문

根据传热学原理和计算机辅助热分析（CATA）技术为理论基础，通过试验方法研究了镁合金AM60半固态成形性，研究结果表明，AM60合金固相率对温度的变化极为敏感，当初始固相分数从20％过渡到30％，温度从618．0℃降至615．4℃，仅仅约降低了2．6℃。在此区间内，固相率对温度的平均变化为3．85％／℃，初始固相率波动幅度为12．8％-19．2％／℃；当初始固相分数从30％过渡到40％，温度从615．4℃降至612．2℃，也仅有3．2℃左右。在此区间内，固相率对温度的平均变化为3．125％／℃，初始固相率波动幅度为7．8％-10．4％／℃；当温度在577．9—589．9℃区间内（跨度约为12℃），由于AM60镁合金固相分数则始终维持在62％上下。因此，AM60镁合金半固态成形工艺中，其初始固相率不应选择通常的20％-40％的区间范围内，而应该选择较大值，最佳值为62％左右。
근거전열학원리화계산궤보조열분석（CATA）기술위이론기출，통과시험방법연구료미합금AM60반고태성형성，연구결과표명，AM60합금고상솔대온도적변화겁위민감，당초시고상분수종20％과도도30％，온도종618．0℃강지615．4℃，부부약강저료2．6℃。재차구간내，고상솔대온도적평균변화위3．85％／℃，초시고상솔파동폭도위12．8％-19．2％／℃；당초시고상분수종30％과도도40％，온도종615．4℃강지612．2℃，야부유3．2℃좌우。재차구간내，고상솔대온도적평균변화위3．125％／℃，초시고상솔파동폭도위7．8％-10．4％／℃；당온도재577．9—589．9℃구간내（과도약위12℃），유우AM60미합금고상분수칙시종유지재62％상하。인차，AM60미합금반고태성형공예중，기초시고상솔불응선택통상적20％-40％적구간범위내，이응해선택교대치，최가치위62％좌우。
In the present work, based on heat transfer theory and CATA technology, a research on formability of semi -solid magnesium alloy AM60 was implemented through an experiment which achieved the quantitative rela-tionship between the semisolid solid - phase rate and temperature. It is shown that the solid - phase rate of AM60 alloys is extremely sensitive to its temperature. About only 2. 6℃ decreases when the solid - phase rate of the alloys is changed from 20% to 30%, and the average change rate of solid rate to temperature is 3.85%/℃, initial solid rate fluctuations from 12. 8% to 19. 2%/℃ ; About 3.2℃ decrease when the solid - phase rate of the alloy changed from 30% to 40%, and the average change rate of solid rate to temperature is 3. 125%/℃, initial solid rate fluctuations from 7.8% to 10. 4%/℃ ; While the temperature range from 577.9℃ to 589.9℃, which span 12 ℃, solid rate is always maintained at around 62% ? The result indicates that the initial solid rate should be higher, best is 62% rather than the usual 20% to 40% according to the AM60 magnesium alloy.