5Heat treatment and mechanical testing of AISI H11 steel

Sayyad Zahid Qamar*

*المؤلف المقابل لهذا العمل

نتاج البحث: Conference contribution

12 اقتباسات (Scopus)


Belonging to the class of chromium tool steels, AISI H11 possesses very good toughness and hardness, and is therefore suitable for hot metalforming jobs performed at very high loads. Mostly used in fabrication of helicopter rotor blades, H11 also has great potential as a die steel in hot-work forging and extrusion. This alloy steel can be heat treated to increase the service life and dimensional accuracy of the die and tooling. Main aim of the current investigation was to formulate an optimum heat treatment strategy for H11 steel, especially for hot work applications. High-speed milling and electric discharge machining were used to fabricate samples for tensile and impact testing. After various types of heat treatment (annealing, austenitizing, air cooling or oil quenching, single and double tempering), these samples were tested for hardness, toughness (impact), yield strength, tensile strength, and ductility. Microstructural analysis was also performed to analyze the effect of heat treatment on mechanical properties. As tempering temperature increases, hardness initially increases and then starts to gradually decrease; impact strength first decreases and then increases; and yield strength exhibits a fluctuating pattern of initial decline followed by an increase and another decrease. Even though H11 steel is highly suitable for both hot and cold-work, it is surprisingly not a common choice for metalworking dies and tools. Results presented here can encourage die designers and hot-work practitioners to explore the versatility of this tool steel, and to adopt appropriate heat treatment strategies for different applications.

اللغة الأصليةEnglish
عنوان منشور المضيفRecent Development in Machining, Materials and Mechanical Technologies
المحررونJyh-Chen Chen, Usuki Hiroshi, Sheng-Wei Lee, Yiin-Kuen Fuh
ناشرTrans Tech Publications Ltd
عدد الصفحات6
رقم المعيار الدولي للكتب (المطبوع)9783038354956
المعرِّفات الرقمية للأشياء
حالة النشرPublished - 2015
الحدثInternational Conference on Machining, Materials and Mechanical Technologies, IC3MT 2014 - Taipei City, Taiwan, Province of China
المدة: أغسطس ٣١ ٢٠١٤سبتمبر ٥ ٢٠١٤

سلسلة المنشورات

الاسمKey Engineering Materials
مستوى الصوت656-657
رقم المعيار الدولي للدوريات (المطبوع)1013-9826
رقم المعيار الدولي للدوريات (الإلكتروني)1662-9795


OtherInternational Conference on Machining, Materials and Mechanical Technologies, IC3MT 2014
الدولة/الإقليمTaiwan, Province of China
المدينةTaipei City

ASJC Scopus subject areas

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