Mechanical properties and machinability of a high-strength, medium-carbon, microalloyed steel

Ollilainen, V.; Hurmola, H.; Pöntinen, H.

doi:10.1007/bf02835720

Cited by 16 publications

(11 citation statements)

References 1 publication

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…An order of magnitude decrease in grain size from 100 to 10 /im increases the %RA by 30%. Ollilaninen (29) shows a similar dependence of %RA on grain size for MA a-P steels.…”

Section: Icmentioning

confidence: 67%

“…Ollilaninen et al (29) found that K Ic was four times higher for Q&T steels compared to MA a-P steel at a YS of 650 MPa. The difference in K Ic between the two steels was not considered significant for many applications because K Ic did not change the fatigue life, the limiting failure mode, considerably.…”

Section: Limited Kmentioning

confidence: 98%

“…Ollilainen et al, (29) have shown that the lower temperature transformation products in a a-P steel with V, Cr, and Mn additions and a C content of 0.45 mass % increase strength, but lower the toughness and machinability .…”

Section: Effect Of Precipitationmentioning

confidence: 99%

“…Given the fact that most of the fatigue life A schematic curve of the fatigue crack growth and final fracture of high-strength MA a-P steel and Q&T steel (29) is consumed with initiation of crack growth, the difference in number of cycles to failure is rather small compared to the difference measured in K. .…”

Section: Limited Kmentioning

confidence: 99%

See 3 more Smart Citations

Structure-property relationships in microalloyed ferrite-earlite steels- phase 1 :

Purtscher¹,

Cheng²

1993

View full text Add to dashboard Cite

“…An order of magnitude decrease in grain size from 100 to 10 /im increases the %RA by 30%. Ollilaninen (29) shows a similar dependence of %RA on grain size for MA a-P steels.…”

Section: Icmentioning

confidence: 67%

Section: Limited Kmentioning

confidence: 98%

Section: Effect Of Precipitationmentioning

confidence: 99%

Section: Limited Kmentioning

confidence: 99%

See 2 more Smart Citations

Structure-property relationships in microalloyed ferrite-earlite steels- phase 1 :

Purtscher¹,

Cheng²

1993

View full text Add to dashboard Cite

“…High aluminum contents can also impair machinability [50]. Aluminum is an element whose impact on austenite microstructure and precipitation state is usually underestimated.…”

mentioning

confidence: 99%

Role of microalloying elements in the microstructure of hot rolled steels

Gómez

Medina

2011

International Journal of Materials Research

View full text Add to dashboard Cite

Role of microalloying elements in the microstructure of hot rolled steelsA comparative study of some of the most important effects of the diverse microalloying elements on austenite and ferrite microstructure of hot rolled microalloyed steels is carried out. The values of different aspects such as pinning and driving forces, size of precipitates, activation energies or diffusion coefficients are discussed. Titanium is the most effective element to control grain growth at high reheating temperatures and a weight Ti/N ratio close to 2 is recommended.Aluminum can help to control grain growth at medium temperatures, but its addition to Ti steels can promote abnormal grain growth. Niobium is the most effective element to inhibit static recrystallization of austenite, due to the adequate precipitation temperature range at deformation temperatures and the strong pinning effect of Nb carbonitrides. Finally, the preferential nucleation of intragranular ferrite on particles such as vanadium carbonitrides enhances the ferrite grain refinement.

show abstract

Microstructural Refinement and Mechanical Properties of High‐Speed Niobium‐Microalloyed Railway Wheel Steel

Zhang

et al. 2014

steel research int.

View full text Add to dashboard Cite

The relationship between microstructure and mechanical properties was studied in a Nb‐bearing high‐speed railway wheel steel and compared with a traditional low‐alloyed medium carbon steel. The microstructure of medium carbon steel comprised of ferrite and pearlite and the percentage of ferrite was increased from 4 to 24% on the addition of 0.06 wt% Nb and the grain size was refined. The addition of Nb inhibited mixed microstructure and delayed the coarsening temperature of austenite grains from 880 to 960 °C. The yield strength of Nb‐bearing steel was increased from 385 to 455 MPa and the Charpy v‐notch energy at −20 °C was increased from 7.0 to 19.0 J with no apparent reduction in tensile strength. Niobium formulates grain refinement and transformation of austenite to ferrite and pearlite over a wide region of cooling rate (<10 °C s−1) and temperature range (530–690 °C) in the medium carbon steel. With the calculation of Thermal‐Calc software and solid solubility formula, Nb exists in the form of precipitates. The grain refining and precipitation strengthening are roles of niobium in promoting ferrite–pearlite transformation and improve toughness in the medium carbon steel.

show abstract

Mechanical properties and machinability of a high-strength, medium-carbon, microalloyed steel

Cited by 16 publications

References 1 publication

Structure-property relationships in microalloyed ferrite-earlite steels- phase 1 :

Structure-property relationships in microalloyed ferrite-earlite steels- phase 1 :

Role of microalloying elements in the microstructure of hot rolled steels

Microstructural Refinement and Mechanical Properties of High‐Speed Niobium‐Microalloyed Railway Wheel Steel

Contact Info

Product

Resources

About