CN1570594A - 镁合金试棒简易拉伸蠕变试验方法 - Google Patents
镁合金试棒简易拉伸蠕变试验方法 Download PDFInfo
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Abstract
本发明公开了属于有色金属高温性能试验技术的一种镁合金试棒简易拉伸蠕变试验方法。该方法是在一个工字形支架上同时固定多个拉伸蠕变试棒进行试验,以弹簧作为加力系统,对各个试棒施以相同的轴向拉力,并加热、保温,获得在规定时间内试棒的最终蠕变伸长量。通过获得大量的试棒最终蠕变伸长量而不是完整的蠕变曲线来定性地判断材料的抗蠕变性能。方法简单、直观,可以作为金属拉伸蠕变试验的前期试验,对新合金的研制方案进行初选。
Description
技术领域
本发明属于有色金属高温性能试验技术特别涉及一种镁合金试棒简易拉伸蠕变试验方法。
背景技术
目前蠕变试验方法所涉及的蠕变试验机普遍采用杠杆加力系统,并且使用引伸引测量变形。这样可以获得完整的蠕变曲线,保证试验数据的精度。但每次试验的试棒数量受到了限制,使蠕变试验变得费时费力、成本高,无法得到较多的数据点。这对分析镁合金的高温蠕变性能有较大的限制。
发明内容
本发明的目的是提出了一种镁合金试棒简易拉伸蠕变试验方法。该方法是在一个工字形支架上同时固定8~10个拉伸蠕变试棒进行试验,以弹簧作为加力系统,对各个试棒施以相同的轴向拉力,在150~200℃高的温度,保温200~500小时下,获得在试验时间内的最终蠕变伸长量。
本发明的有益效果是,通过获得大量的试棒最终蠕变伸长量而不是完整的蠕变曲线来定性地判断材料的抗蠕变性能。方法简单、直观,可以作为金属拉伸蠕变试验的前期试验,对新合金的研制方案进行初选。
附图说明
图1为简易拉伸蠕变试验装置示意图。
具体实施方式
本发明提出了一种镁合金试棒简易拉伸蠕变试验方法。该方法是在一个工字形支架上同时固定8~10个拉伸蠕变试棒进行试验,以弹簧作为加力系统,对各个试棒施以相同的轴向拉力,在150~200℃高的温度下保温200~500小时,获得在规定时间内试棒的最终蠕变伸长量。具体试验如图1所示,将试棒5固定在支架1上的上夹具4和下夹具6之间,对螺母2施以给定的扭矩。通过螺母、碟形弹簧3和上夹具4、下夹具6的作用在试棒5上得到一个确定的轴向拉力。整个装置放在箱式电阻炉内连续加热至150~200℃,保温200~500小时,通过测量试棒标距部分的长度变化得出最终蠕变伸长量。
Claims (1)
1.一种镁合金试棒简易拉伸蠕变试验方法,其特征在于:在一个工字形支架上同时固定8~10个拉伸蠕变试棒进行试验,以弹簧作为加力系统,对各个试棒施以相同的轴向拉力,在150~200℃高的温度下保温200~500小时,获得在试验时间内试棒的最终蠕变伸长量。
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Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN101221107B (zh) * | 2008-01-29 | 2010-06-23 | 洛阳市谱瑞慷达耐热测试设备有限公司 | 自动进样热态应变压力试验机及测量方法 |
CN109030196A (zh) * | 2018-08-18 | 2018-12-18 | 深圳阿尔泰克轻合金技术有限公司 | 一种金属材料单轴抗蠕变试验试样、夹具及方法 |
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Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN101221107B (zh) * | 2008-01-29 | 2010-06-23 | 洛阳市谱瑞慷达耐热测试设备有限公司 | 自动进样热态应变压力试验机及测量方法 |
CN109030196A (zh) * | 2018-08-18 | 2018-12-18 | 深圳阿尔泰克轻合金技术有限公司 | 一种金属材料单轴抗蠕变试验试样、夹具及方法 |
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