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粉末冶金高溫合金差熱曲線的相變溫度分析方法

發(fā)布人:上海艾荔艾金屬材料有限公司bt990.com.cn 更新時(shí)間:2015-12-31
采用差熱分析技術(shù),研究樣品質(zhì)量和升溫速率對(duì)FGH96合金差熱曲線的影響。以FGH96為代表,探索采用差熱曲線分析方法準(zhǔn)確測(cè)量粉末冶金高溫合金相變溫度的最佳升溫速率和樣品質(zhì)量。分析和對(duì)比差熱曲線不同方法判定的γ′相完全溶解溫度、固相線溫度及液相線溫度。改進(jìn)了固相線判定方法,并在此基礎(chǔ)上確定了FGH96合金中主要相變溫度的最優(yōu)判定方法。實(shí)驗(yàn)測(cè)定了FGH96合金熱等靜壓、熱擠壓和熱處理狀態(tài)的相變溫度。
粉末冶金高溫合金差熱曲線的相變溫度分析方法Analysis methods of phase transformation temperature on differential thermal analysis curves of powder metallurgy superalloy
采用差熱分析技術(shù),研究樣品質(zhì)量和升溫速率對(duì)FGH96合金差熱曲線的影響。以FGH96為代表,探索采用差熱曲線分析方法準(zhǔn)確測(cè)量粉末冶金高溫合金相變溫度的最佳升溫速率和樣品質(zhì)量。分析和對(duì)比差熱曲線不同方法判定的γ′相完全溶解溫度、固相線溫度及液相線溫度。改進(jìn)了固相線判定方法,并在此基礎(chǔ)上確定了FGH96合金中主要相變溫度的最優(yōu)判定方法。實(shí)驗(yàn)測(cè)定了FGH96合金熱等靜壓、熱擠壓和熱處理狀態(tài)的相變溫度。結(jié)果表明:FGH96合金在不同狀態(tài)下的相變溫度基本相同。同時(shí),確定了高溫合金差熱分析的兩個(gè)重要實(shí)驗(yàn)參數(shù),提出可統(tǒng)一應(yīng)用于高溫合金差熱曲線分析相變溫度的判定方法。

The effects of sample mass and heating rate on differential thermal analysis (DTA) curves were investigated. Available methods for determining gamma prime(γ′)solvus, solidus and liquidus were analyzed and compared separately. This study improves methods for determining solidus and identifies optimal methods for measuring temperature of γ′solvus, solidus and liquidus. Transformation temperatures of FGH96 samples prepared by hot isostatic pressing(HIP), hot extrusion(HEX) and heat treatment(HT) were tested. DTA curves do not show significant differences.Appropriate sample mass and heating rate are obtained, and auniversalapplicable analysis method of DTA curves for dermining phase transformation temperatures of powder metallurgy superalloy is proposed.

全文下載:http://pan.baidu.com/s/1sk3Cl7B

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AILIAI has been a reliable partner and supplier of sophisticated and high-quality semi-finished products maed of alloys. In dialogue with our customers, we optimise our products to meet the specific application requirements. AILIAI develops the best alloy material solutions for current and future challenges.

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