SUS XM7不銹鋼合金設計之研究

A study of the alloy design of SUS XM7 stainless steel

蕭名宏(Ming-Hung Hsiao) ； 黃祺祥(Chi-Shang Huang)

《鑛冶：中國鑛冶工程學會會刊》 44卷1期 (2000/03) Pp. 103-112

https://doi.org/10.30069/MM.200003_44(1).0010

摘要

本文為瞭解銅、鎳等合金元素對SUS XM7不銹鋼機械性質的影響，以真空電弧精煉的方式配製鎳、銅含量不同的試片，再進行拉伸、硬度、X-ray繞射等實驗來研究SUS XM7不銹鋼在不同的銅、鎳含量下之加工硬化行為、顯微組織及機械性質，以作為產業界合金設計上之參考。在實驗結果中顯示：隨著鎳、銅含量的增加，材料的加工硬化指數、伸長率、應變誘發麻田散鐵變態量均呈現遞減的趨勢。在17.5Cr-9.6Ni的不銹鋼組成範圍內，銅含量達3.5 wt.%時，則其對沃斯田鐵相穩定度的貢獻已達飽和；當銅含量小於3.5 wt.%時，其冷軋鋼片的硬度值隨銅含量的增加而降低，但當銅含量超過4 wt.%時，其冷軋鋼片的硬度值不減反增。而對12Ni-17.5Cr的合金而言，其硬度值是隨銅含量的增加而呈直線下降。

關鍵字

疊差能 ； 應變誘發麻田散鐵 ； 加工硬化

並列摘要

In order to study the effect of Cu and Ni on mechanical property of austenitic stainless steel. The vacuum arc refining method was used to melt the specimens with different Cu and Ni content, and then using tensile test, hardness test and X-ray diffraction to study the work-hardening characteristics, microstructure and mechanical properties for the reference of the stainless steel plants. The results showed that increase of Cu and Ni content would reduce the work-hardening exponent, elongation and the content of strain induced martensite of material. For the 9.6Ni-17.5Cr alloys, the contribution of Cu on stabilizing the austenite is saturated at 3.5 wt. %. For the cold rolling sheet of the 9.6Ni-17.5Cr alloys, the hardness decreases with increase of the Cu content when Cu content is below 3.5 wt%, and attains a minimum value at 4 wt%. But, when Cu content exceeds 4.0 wt%, hardness increases with increase of Cu content. For the 12Ni-17.5Cr alloys, the hardness decreases linearly with increase of Cu content.

並列關鍵字

Stacking fault energy ； Strain induced martensite ； Work hardening