Simulation of Quenching Crack Generation in Low Alloy Cast Steel by Using Heat-treatment CAE Software

The patters of the effect of change in the chemical composition and modes of heat treatment on the structure and complex of mechanical properties of cast steel VKL-3 (12Kh2NVML) are studied. The experimental melting of steel with increased content of chromium, silicon, nickel and molybdenum is obtained. The steel of this composition has reduced ductility and toughness. At the same time, experimental steel melting makes it possible to the model segregation zones with increased content of alloying elements in the steel of typical composition that has chemical and structural heterogeneity and heterogeneity of ductility and toughness. It is shown that the use of the fi nal heat treatment with the adjusted modes (in particular, increased temperature and time of tempering) allows increasing the ductility of the steel to the required values, but the impact strength does not reach the required levels. The recommendations for maintaining of the alloying elements content near the lower allowable limit are given.

Download Full-text

Influence of Heat Treatment on Mechanical Properties and Microstructure of Low Alloy Cast Steel (ZG25MnNi)

Advanced Materials Research ◽

10.4028/www.scientific.net/amr.887-888.207 ◽

2014 ◽

Vol 887-888 ◽

pp. 207-213

Author(s):

Teng Shi Liu ◽

Yi Tao Yang

Keyword(s):

Mechanical Properties ◽

Heat Treatment ◽

Tensile Strength ◽

Cast Steel ◽

High Strength ◽

Treatment Temperature ◽

Maximum Hardness ◽

Tempering Temperature ◽

Cast Microstructure ◽

Alloy Cast

In this paper, the influence of heat treatment temperature on the microstructure and mechanical properties of cast steel (ZG25MnNi) was investigated. The results showed that normalizing treatment can effectively refine cast microstructure of ZG25MnNi and maximum hardness achieved at 900°C. After normalized at 900°C, the sample tempered at 500°C,530°C,560°C, 590°C, 620°C, 650°C respectively. With the tempering temperature increasing, the samples tensile strength increased gradually and elongation decreased gradually. When tempered at 530-590°C, the sample had a relatively high strength plastic product. The results showed that the best normalizing temperature is 900°C and the optimum tempering temperature is 530-590°C.

Download Full-text

Effect of Heat Treatment on Structure and Wear Resistance of High Chromium Cast Steel Containing Boron

Journal of Iron and Steel Research International ◽

10.1016/s1006-706x(14)60083-2 ◽

2014 ◽

Vol 21 (5) ◽

pp. 532-538 ◽

Cited By ~ 9

Author(s):

Qi-hong Cen ◽

Hi-bin Zhang ◽

Han-guang Fu

Keyword(s):

Heat Treatment ◽

Wear Resistance ◽

Cast Steel ◽

High Chromium

Download Full-text

The Structure of the Silumin Coat on Alloy Cast Steels

Archives of Foundry Engineering ◽

10.2478/v10266-012-0064-3 ◽

2012 ◽

Vol 12 (2) ◽

pp. 215-220

Author(s):

T. Szymczak

Keyword(s):

Phase Structure ◽

High Speed ◽

Cast Steel ◽

Intermetallic Phases ◽

External Layer ◽

Cast Steels ◽

Steel Grades ◽

The Absolute ◽

The Given ◽

Alloy Cast

The Structure of the Silumin Coat on Alloy Cast Steels The work presents the analysis results of the structure of the coat obtained by dipping in silumin AlSi5 of two grades of alloy cast steel: GX6CrNiTi18-10 (LH18N9T) and GX39Cr13 (LH14). The temperature of the silumin bath was 750±5°C, and the hold-up time of the cast steel element τ = 180 s. The absolute thickness of the coat obtained in the given conditions was g = 104 μm on cast steel GX6CrNiTi18-10 and g = 132 μm on GX39Cr13. The obtained coat consisted of three layers of different phase structure. The first layer from the base "g1" was constructed of the phase AlFe including Si and alloy additives of the tested cast steel grades: Cr and Ni (GX6CrNiTi18-10) and Cr (GX39Cr13). The second layer "g1" of intermetallic phases AlFe which also contains Si and Cr crystallizes on it. The last, external layer "g2" of the coat consists of the silumin containing the intermetallic phases AlFeSi which additionally can contain alloy additives of the cast steel. It was shown that there were no carbides on the coat of the tested cast steels which are the component of their microstructure, as it took place in the case of the coat on the high speed steels.

Download Full-text

Microstructures and Properties of a Bainite and Martensite Dual-Phase Cast Steel Fabricated by Combination of Alloying and Controlled Cooling Heat Treatment

Materials Science Forum ◽

10.4028/www.scientific.net/msf.475-479.93 ◽

2005 ◽

Vol 475-479 ◽

pp. 93-96 ◽

Cited By ~ 3

Author(s):

Ye Hua Jiang ◽

Rong Feng Zhou ◽

Dehong Lu ◽

Zhen Hua Li

Keyword(s):

Heat Treatment ◽

Cast Steel ◽

Residual Austenite ◽

Lower Bainite ◽

Manganese Steel ◽

Isothermal Quenching ◽

Dual Phase ◽

Controlled Cooling ◽

Carbide Particles ◽

Better Than

A bainite/martensite dual-phase cast steel was fabricated by a process of combination of alloying with Si and Mn elements and controlled cooling heat-treatment. Its microstructure was consisted of fine lower bainite with carbide particles precipitated homogeneously, martensite and a little residual austenite. Because of the good match of hardness and impact toughness, its impact wear performance was a little better than that of the isothermal quenching steel, and much better than that of high manganese steel such as Mn13.

Download Full-text

Influence of Ni content on impact-abrasion wear resistance of medium-carbon low alloy cast steel

Materials Research Express ◽

10.1088/2053-1591/ab3cef ◽

2019 ◽

Vol 6 (10) ◽

pp. 106594

Author(s):

Yongxin Xie ◽

Ying Liu ◽

Hong Guo ◽

Wei Li ◽

Dahai Zeng

Keyword(s):

Wear Resistance ◽

Cast Steel ◽

Medium Carbon ◽

Ni Content ◽

Abrasion Wear ◽

Alloy Cast

Download Full-text

Discrete Wavelet Analysis of Electrochemical Current Noise of a High-Alloy Cast Steel in Sulfuric Acid and Sodium Chloride Solution

Diffusion Foundations ◽

10.4028/www.scientific.net/df.22.48 ◽

2019 ◽

Vol 22 ◽

pp. 48-54

Author(s):

Marcel Mandel ◽

Volodymyr Kietov ◽

Lutz Krüger

Keyword(s):

Sulfuric Acid ◽

Acid Solution ◽

Sulfuric Acid Solution ◽

Chloride Solution ◽

Cast Steel ◽

Noise Signal ◽

Discrete Wavelet ◽

High Alloy ◽

Electrochemical Current ◽

Alloy Cast

The electrochemical current noise signal of a high-alloy cast steel was investigated in a 0.1 M sulfuric acid solution and in a 5 wt.% sodium chloride solution. In the sulfuric acid solution, the current time signal reveals characteristic spikes of high amplitudes. In the chloride containing solution, spontaneous power drops with a subsequent recovery of comparatively low intensity characterize the noise signal. Both noise records were analyzed by the discrete wavelet transform. For the noise signal in the sulfuric acid solution, the received wavelet coefficients exhibit the highest values in the fine scale, which signal the dominance of short-time corrosion events that were attributed to the observed hydrogen bubble evolution. In the chloride containing medium, the signal decomposition by the wavelet analysis reveals the highest coefficients predominantly in the coarse scale, indicating a preferred initiation of corrosion processes of high duration. The subsequent observations by scanning electron microscopy, reveal an attack by micro pitting, which is associated with the noise events.

Download Full-text