Effect of double tempering on the properties of steels

Madyanov, S. A.

doi:10.1007/bf00658514

Cited by 5 publications

(4 citation statements)

References 3 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…Proses temper tahap kedua memberikan kesempatan pada karbon untuk lebih menyebar, sehingga klaster ferit menghilang. Pada sampel NT (Gambar 5) dimungkinkan pembentukan martensit di batas butir austenite yang berasal dari austenit yang tersisa di batas butir tersebut (Madyanov, 1973). Struktur sampel NTT650 terlihat lebih merata yang terdiri dari Bainit yang tertemper, dan ada Bainit yang belum tertemper (berwarna coklat).…”

Section: Methodsunclassified

Pengaruh Proses Normalising dan Tempering Ganda Terhadap Peningkatan Nilai Modulus of Toughness Baja AISI 4340

Bandanadjaja

Idamayanti

2020

TEKNIK

View full text Add to dashboard Cite

Baja AISI 4340 merupakan baja paduan Nikel, Chrom dan Molibden. Baja ini memiliki sifat kemampuan untuk dilaku-panas (heat-treatable) yang baik. Penelitian ini ditujukan untuk meningkatkan ketangguhan baja AISI 4340 melalui proses perlakuan panas. Metode percobaan dilakukan dengan memberikan variasi proses perlakuan panas pada baja AISI 4340. Proses perlakuan panas yang diberikan yaitu normalising pada temperatur 900 °C, tempering tahap pertama pada temperatur 650 °C dan tempering tahap kedua dengan variasi 650 °C dan 705 °C. Pengaruh pemberian tambahan proses tempering setelah normalising dan temperatur temperingnya dianalisis untuk diketahui sejauh mana dapat meningkatkan ketangguhan baja ini. Hasilnya menunjukkan bahwa pemberian tambahan proses tempering dua kali pada 650 °C setelah normalising pada temperatur 900 °C dapat meningkatkan elongasi baja AISI 4340. Ketangguhan sebagai salah satu sifat mekanik yang akan ditingkatkan merupakan nilai kombinasi kekuatan tarik, kuat luluh dan elongasi, dalam nilai modulus of toughness. Hasil perhitungan modulus of toughness yang terbaik diperoleh dari proses perlakuan panas normalising, kemudian tempering tahap I pada temperatur 650 °C dan tempering tahap II pada temperatur 650 °C, yaitu sebesar 1.206 kgf.mm/mm 3 , meningkat 450 % dibandingkan dengan kondisi as-cast tanpa proses perlakuan panas sebesar 267 kgf.mm/mm 3 .

show abstract

Section: Methodsunclassified

Pengaruh Proses Normalising dan Tempering Ganda Terhadap Peningkatan Nilai Modulus of Toughness Baja AISI 4340

Bandanadjaja

Idamayanti

2020

TEKNIK

View full text Add to dashboard Cite

show abstract

“…This significant difference can be studied due to the tempering temperature of this subgroup. According to reference [27] and Figure 8 taken from reference [28] for AISI A2 tool steel with chemical composition:…”

Section: Effect Of Austenitizing Temperaturementioning

confidence: 99%

Heat treatment effects on three-dimensional morphology of chromium carbide in AISI D2 tool steel studied by serial sectioning method

Ghezghapan¹

2018

Preprint

View full text Add to dashboard Cite

We developed a three-dimensional microstructure analysis system based on the manual serial sectioning method to evaluate the heat treatment effects on chromium carbide size and morphology in AISI D2 tool steel. Two heat treatment factors, austenitizing and tempering temperature were investigated. The results show that increasing in austenitizing temperature leads to further carbide precipitation after the tempering process and increasing in the tempering temperature causes precipitate smaller secondary carbides even more than the primary carbides.

show abstract

“…The impact toughness of a steel can be raised by choosing the temperatures of the first and second tempering, if the steel contains alloying elements decelerating the decomposition of martensite. The appropriate choice provides optimum distribution of the carbide phase, admissible level of stresses in the martensite, and hence creation of optimum properties in the metal [3]. In [1] the impact toughness of steel 30KhGSA was measured after 3-h tempering at 200 -600°C and cooling in air.…”

mentioning

confidence: 99%

“…The available data show that two-stage tempering affects little the rupture strength. The dependence of the ductility and of the impact toughness on the composition of the steel and on the tempering temperature and time is more complex [3]. The effect of two-stage tempering is stronger in silicon-alloyed steels due to the action of silicon on formation of carbides during tempering.…”

mentioning

confidence: 99%

A Study of the Effect of Two-Stage Tempering on Mechanical Properties of Steel 30CrMnSi Using Analysis on Response Surface in Design of Experiment

et al. 2016

View full text Add to dashboard Cite

The mechanical properties of steel 30CrMnSi (30KhGSA) are studied upon optimization of the mode of heat treatment with respect to four parameters [the duration of austenitization (15 -40 min), the temperature of the first tempering (480 -530°C), the temperature of the second tempering (the temperature of the first tempering ± 50°C), the duration of the second tempering (60 -100 min)] and upon changing the cooling medium in quenching, first tempering, second tempering, and second refinement. The parameters are optimized using the method of analysis on the response surface for 30 tests. The structure of the steel after the treatment by the optimized modes is studied by scanning electron microscopy, including the methods of back-scattered electrons and energy dispersive analysis. INTRODUCTIONSteel 30CrMnSi (30KhGSA) is a well known representative of high-strength low-alloy steels. Various variants of heat treatment of this steel provide a wide range of mechanical properties, which makes this grade suitable for various operating conditions. The composition of steel 30CrMnSi fully matches that of the Russian 30KhGSA counterpart; the western counterparts are grades AISI 4130 and 5130 [1]. Table 1 presents the chemical compositions of steel 30KhGSA prescribed by the Russian Standard and of steel 30CrMnSi determined by a spark emission spectroscopic analysis. The design critical points for 30CrMnSi are as follows: Ac 1 = 718°C, Ac 3 = 846°C (reported values are Ac 1 = 760°C and Ac 3 = 830°C). The preferred temperature of austenitizing is about 890°C [2].Repeated tempering of tool steels is a well known method, but such tempering is applied rarely to low-alloy steels. As a rule, the required properties are obtained by varying the parameters of one-stage (first) tempering. The available data show that two-stage tempering affects little the rupture strength. The dependence of the ductility and of the impact toughness on the composition of the steel and on the tempering temperature and time is more complex [3]. The effect of two-stage tempering is stronger in silicon-alloyed steels due to the action of silicon on formation of carbides during tempering. At a high Si : C proportion in the solid solution an e-carbide may precipitate due to low-temperature tempering of martensite. At higher tempering temperatures carbon becomes steadier in the solid solution, and the volume fraction of the carbide phase decreases. The impact toughness of a steel can be raised by choosing the temperatures of the first and second tempering, if the steel contains alloying elements decelerating the decomposition of martensite. The appropriate choice provides optimum distribution of the carbide phase, admissible level of stresses in the martensite, and hence creation of optimum properties in the metal [3]. In [1] the impact toughness of steel 30KhGSA was measured after 3-h tempering at 200 -600°C and cooling in air. Tempering at 250 -400°C lowers the impact toughness, i.e., the steel becomes susceptible to temper brittleness. In [4] the microstructur...

show abstract

Effect of double tempering on the properties of steels

Cited by 5 publications

References 3 publications

Pengaruh Proses Normalising dan Tempering Ganda Terhadap Peningkatan Nilai Modulus of Toughness Baja AISI 4340

Pengaruh Proses Normalising dan Tempering Ganda Terhadap Peningkatan Nilai Modulus of Toughness Baja AISI 4340

Heat treatment effects on three-dimensional morphology of chromium carbide in AISI D2 tool steel studied by serial sectioning method

A Study of the Effect of Two-Stage Tempering on Mechanical Properties of Steel 30CrMnSi Using Analysis on Response Surface in Design of Experiment

Contact Info

Product

Resources

About