Microstructure and properties of thermomechanically treated and bake hardened AISI 4340 steel

Kumar, Arun; Jayakumar, P; Sharma, Vishnu

doi:10.1016/j.matpr.2019.06.514

Cited by 6 publications

(3 citation statements)

References 5 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…Optimization of materials mechanical strength is carried out through a heat treatment process [1,5]. The modern industry is looking for a best combination of heating and cooling (hardening) methods for steel components to meet the demands of engineering applications [6]. Heat treatment modifies the micro structure of steel so that it changes the mechanical properties of material [7].…”

Section: Introductionmentioning

confidence: 99%

Hardness and Toughness Investigation of ASSAB 705 Steel by Various Tempering Temperatures

Ismartaya

Bawono

Anggoro

2023

KEM

View full text Add to dashboard Cite

ASSAB 705 steel is a machinery steel that used in several industries due to its mechanical properties, for components manufacturing. Hardening process is applied to ASSAB 705 to increase mechanical strength thereby increasing hardness. Conversely, an increase in the hardness value will decrease toughness value so that components are easily damaged due to heavy workloads. The optimal combination of hardness and toughness enhances abrasion resistance and maintains component strength against working loads. It is necessary to investigate parameters of hardening process and its effect on the hardness and toughness of ASSAB 705 steel. This study used Design of Experiment with Taguchi method and ANOVA statistical analysis. Hardening parameter with austenite temperature factor, quench media, and tempering temperature, is used to optimize the combination of hardness-toughness value of ASSAB 705 steel. Results of this research show that tempering temperature is the most influential factor on hardness and toughness values. Optimal combination of mechanical strength is obtained at a hardness value of 50.78 HRC (increase of 44.85%) and a toughness value of 1.15 J/mm2 (increase of 109.09%). These values were obtained from the hardening method: austenite temperature of 825°C, oil quench medium, and tempering temperature of 180°C. The desirability value for combination of hardening process parameters is 0,682802.

show abstract

Section: Introductionmentioning

confidence: 99%

Hardness and Toughness Investigation of ASSAB 705 Steel by Various Tempering Temperatures

Ismartaya

Bawono

Anggoro

2023

KEM

View full text Add to dashboard Cite

show abstract

“…Furthermore, the different research made in the selection of materials for the rack and pinion system have shown that different materials can fulfill the needs of the applications. In this sense, the materials that are considered suitable for the steering rack are the steel 41Cr4 annealed (AISI 5140), also the steel 20MoCr4 (AISI 8620) annealed [27] and the steel AISI 4340 are often used for the pinion [28]. Kusmoko and Crosky carried out research to characterize a wear resistance improvement of a pinion made of AISI 4140 that reached 45HRC [29]; in this sense, we were interested in using the basic material annealed.…”

Section: Introductionmentioning

confidence: 99%

Multicriteria Decision Making of a Life Cycle Engineered Rack and Pinion System

2022

View full text Add to dashboard Cite

The automotive industry has been developed over the years to build lighter and more efficient vehicles; however, the manufacturing processes still have an important environmental impact starting from the acquisition of the raw material until the end of its useful life. In this sense, life cycle engineering contributes to solve the environmental issues produced by the traditional manufacturing industry by considering a process that evaluates the technical aspects of the product but also weights the importance of the environmental impact. However, since there are some alternatives that can be considered as suitable for their technical, environmental, or cost qualities, the multicriteria decision methods used as an engineering tool have been useful to balance all the needed criteria in order to make the best selection. In this sense, this research provided an analysis of five materials that could be used in a rack and pinion system and were submitted to a process of life cycle analysis to consider the environmental parameters as part of the criteria to be assessed by the multicriteria decision methods such as entropy, the Technique of Order Preference Similarity method, the complex proportional assessment method, and the multicriteria optimization and compromise solution, leading to the selection of the best material to be considered for a rack and pinion system. In this sense, the process allowed us to conclude that some materials that are useful can be evaluated by multicriteria decision methods regarding the life cycle analysis, contributing to the application of these methods to make a more environmentally responsible material selection for automotive parts. Furthermore, among all the materials, the best suited for the rack and pinion system was the AISI 4340, which was validated by finite elements simulation, showing that the selection was optimal with a maximum stress of 216.14 MPa, a maximum deformation of 0.0081 mm, and a minimum safety factor of 3.56. In this sense, the simulation validated the selection made before, guaranteeing that the methods used are feasible for automotive applications.

show abstract

“…Parameter proses hardening yang tepat memberikan kombinasi kekuatan mekanik yang lebih baik dalam aplikasi penggunaannya [9]. Kombinasi kekuatan, kekerasan, dan ketangguhan baja memenuhi standar kekuatan mekanik yang diperlukan engineer di industri [5,10].…”

unclassified

Optimalisasi Ketangguhan dan Kekerasan Baja AISI 4340 pada Shank Holder Dovetail Cutter paska Proses Hardening dengan Minimasi Biaya Proses

Ismartaya¹,

Karyadi²,

Bawono³

et al. 2022

j.rekayasa.mesin.

View full text Add to dashboard Cite

UMKM bengkel manufaktur membuat Shank Holder Dovetail Cutter berbahan AISI 4340 secara mandiri. Nilai kekerasan pada Shank Holder Dovetail Cutter wajib dimiliki agar alat memiliki umur pakai panjang. Proses hardening menimbulkan dilema berupa resiko kerusakan pada area kritis shank holder, yaitu material pecah bila kekerasan terlalu tinggi namun ketangguhan rendah, atau material mengalami deformasi bila kekerasan rendah. Diperlukan analisis parameter proses hardening untuk menghasilkan kombinasi nilai kekerasan dan ketangguhan yang optimal, serta biaya proses minimal guna mendukung UMKM bengkel manufaktur. Desain eksperimen menggunakan metode Response Surface Method untuk optimalisasi respon dan analisis statistik ANOVA untuk mengidentifikasi kontribusi setiap parameter bagi variabel respon. Parameter suhu austenite, media quench, dan suhu temper menjadi variabel prediktor. Hasil pengujian kekerasan Rockwell-C ASTM E18 dan uji ketangguhan Impact Charpy V-notch E23 diterapkan sebagai variabel respon. Suhu temper merupakan parameter proses hardening yang secara signifikan mempengaruhi nilai kekerasan dan ketangguhan. Suhu temper memberikan kontribusi sebesar 87,44% terhadap respon nilai kekerasan, serta kontribusi 24,77% dan 43,44% terhadap respon nilai ketangguhan. Kombinasi parameter suhu austenite 871,76°C, media quench air, suhu temper 200°C memberikan respon optimal terbaik dengan nilai desirability 0,790; biaya proses Rp.42.586,58; nilai kekerasan 51,211 HRC; dan nilai ketangguhan 1,131 J/mm2

show abstract

Microstructure and properties of thermomechanically treated and bake hardened AISI 4340 steel

Cited by 6 publications

References 5 publications

Hardness and Toughness Investigation of ASSAB 705 Steel by Various Tempering Temperatures

Hardness and Toughness Investigation of ASSAB 705 Steel by Various Tempering Temperatures

Multicriteria Decision Making of a Life Cycle Engineered Rack and Pinion System

Optimalisasi Ketangguhan dan Kekerasan Baja AISI 4340 pada Shank Holder Dovetail Cutter paska Proses Hardening dengan Minimasi Biaya Proses

Contact Info

Product

Resources

About