鐵-17鉻-6鎳-0.2氮合金性質分析

The Characteristic Analysis of the Fe-17Cr-6Ni-0.2N Alloy

蕭惇哲(Hsiao Tun-Che)

指導教授 ： 趙志燁

國立屏東科技大學/工學院/機械工程系所/碩士(2007年)

https://doi.org/10.6346/NPUST.2007.00036

摘要

本文研究17鉻-6鎳-0.2氮合金在經過熱處理後其機械性質與顯微結構，合金於900～1200℃固溶處理後，可得到不同比例的顯微結構。其中固溶處理1000℃後，其顯微結構為麻田散鐵+15%沃斯田鐵，可得到最佳強度與延伸率的組合，其抗拉強度為142.7～145.6ksi，降伏強度為95.5～95.9ksi，延伸率為41.2～47.56%。
此外，研究了17鉻-6鎳-x氮(x：0.04~0.25)合金的變化，經固溶處理1000℃之後，顯微結構為麻田散鐵+χ%沃斯田鐵，其方程式為χ=f[N%]，χ約為4.6～40%，機械性質分佈:抗拉強度約140～175ksi、降伏強度為95.5～125.9ksi、延伸率約17～47%。
而17鉻-6鎳-0.2氮-3銅合金，經固溶處理1000℃與時效處理450、550℃之後，顯微結構為麻田散鐵+y%沃斯田鐵，其方程式為y=f[N%]，y約為32～45%，機械性質分佈:抗拉強度約107～122ksi、降伏強度為33～50.5ksi、延伸率約25～53%。

關鍵字：不銹鋼、氮含量、機械性質

關鍵字

不銹鋼 ； 氮含量 ； 機械性質

並列摘要

This article studies the 17Cr-6Ni-0.2N alloy mechanical property and the microstructure after heat treatment. The alloy after 900~1200℃ solution heat treatment, may obtain the different proportion microstructure.After solution heat treatment 1000℃,microstructure is two-phase structure of martensitic+15% austenitic, alloy has the best mechanical property. The tensile strength ranged from 142.7 to 145.6ksi, the yield strength ranged from 95.5 to 95.9ksi, the elongation ranged from 41.2 to 47.56％.
In addition, This article studied alloy increase nitrogen content 0.04~0.25% change, after solution heat treatment 1000℃, microstructure is martensitic+x%austenitic, the equation is x=f [N%], x≒4.6~40%, mechanical property : the tensile strength ranged from 140~175ksi, the yield strength ranged from 95.5 to 125.9ksi, elongation ranged from 17~47%.
Afterward we study alloy to increase 3% copper, after solution heat treatmen 1000℃ and aging 450, 550℃, microstructure is martensitic+y%austenitic, the equation is y=f[N%], y≒32~45%, mechanical property : the tensile strength ranged from 107~122ksi, the yield strength ranged from 33 to 50.5ksi, elongation ranged from 25~53%.

Keywords: Stainless Steel, Nitrogen content, Mechanical property

並列關鍵字

Stainless Steel ； Nitrogen content ； Mechanical property

參考文獻

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