【摘要】：在熔融堆積成形制造技術(shù)中,成形制品的熱處理工藝對于其力學(xué)性能和外觀有較大影響。以熔體微分粒料3D打印機(jī)為實(shí)驗(yàn)平臺,以PLA為實(shí)驗(yàn)材料,在相同工藝參數(shù)下,打印15個拉伸試件,并將其分成5組,其中,第一組不做處理,第二至第四組分別在不同的溫度下進(jìn)行熱處理。將5組試件進(jìn)行拉伸測試,得到每組平均最大拉伸強(qiáng)度,并取樣進(jìn)行X-射線衍射分析,通過Jade軟件對圖譜進(jìn)行結(jié)晶度計(jì)算,得到了在不同溫度下試件的結(jié)晶度,分析了熱處理溫度、最大拉伸強(qiáng)度、結(jié)晶度之間的相互關(guān)系。實(shí)驗(yàn)結(jié)果表明:隨著熱處理溫度的提高,試件的最大拉伸強(qiáng)度和結(jié)晶度都呈先增大后減小的趨勢,且試件的拉伸強(qiáng)度和結(jié)晶度成正相關(guān)關(guān)系。熱處理溫度在100~120℃之間時,試件的拉伸強(qiáng)度最大;在100℃時,結(jié)晶度達(dá)到最高。僅從試件的拉伸強(qiáng)度考慮,最佳熱處理溫度為100℃。
[Abstract]:The heat treatment of the products has great influence on their mechanical properties and appearance. Using a 3D printer of melt differential granular as the experimental platform and PLA as the experimental material, 15 tensile specimens were printed under the same process parameters and divided into 5 groups, among which, the first group did not do the processing. The second to fourth groups were treated at different temperatures. The average maximum tensile strength of each group was obtained by tensile test of five groups of specimens. The crystallinity of the samples was calculated by Jade software, and the crystallinity of the samples was obtained at different temperatures. The relationship among heat treatment temperature, maximum tensile strength and crystallinity was analyzed. The experimental results show that the maximum tensile strength and crystallinity of the specimens increase first and then decrease with the increase of heat treatment temperature, and the tensile strength and crystallinity of the specimens are positively correlated. When the heat treatment temperature is between 100 鈩，

本文編號：2382388