Influence of Heat Treatment on Mechanical Properties and Microstructure of Mining Machinery Steel Plate Containing Molybdenum and Niobium

2012 ◽  
Vol 602-604 ◽  
pp. 342-346
Author(s):  
Xian Jun Wang ◽  
Qing Feng Ding ◽  
Wen Bin Liu
Keyword(s):  
Mechanical Properties ◽  
Heat Treatment ◽  
Impact Toughness ◽  
Hot Rolling ◽  
Steel Plate ◽  
Rolling Process ◽  
Rolled Plate ◽  
Rolled Steel ◽  
Hot Rolling Process ◽  
Mining Machinery

Influence of different heat treatment on microstructure and mechanical properties of mining machinery steel Plate containing molybdenum niobium was investigated. As-rolled steel plate was processed by normalizing and normalization-tempering respectively. Mechanical properties of as-rolled steel plate, normalizing steel plate and normalizing-tempering steel plate and their microstructures was made a contrast. The experiment result showed that formation of coarse ferrite grain in as-rolled state leads to lower impact toughness. Normalizing treatment can refine coarse ferrite formed in hot rolling process but formation of carbon oversaturation induced new dislocation and distortion. Processing of proper normalizing-tempering can eliminate coarse ferrite in as-rolled state and relieve new dislocation and distortion formed in normalizing process, and therefore made the mechanical properties of the as-rolled plate be the best state.

scholarly journals Sliding Mode Control with Sliding Perturbation Observer-Based Strategy for Reducing Scratch Formation in Hot Rolling Process

2021 ◽  
Vol 11 (12) ◽  
pp. 5526
Author(s):  
Hyun-Hee Kim ◽  
Sung-Jin Kim ◽  
Sung-Min Yoon ◽  
Yong-Joon Choi ◽  
Min-Cheol Lee
Keyword(s):  
Hot Rolling ◽  
Steel Plate ◽  
Sliding Mode ◽  
Rolling Process ◽  
Steel Plates ◽  
Velocity Difference ◽  
Impact Forces ◽  
Hot Rolling Process ◽  
Finishing Mill ◽  
The Impact

In a hot rolling process, excessive friction between rollers and steel plates may lead to the formation of scratches on the steel plate. To reduce scratch formation in the finishing mill of the hot rolling process, two techniques are proposed in this work: flying touch and velocity synchronization. The proposed flying touch method can reduce the impact of the generated force when the upper roller collides with the steel plate. In addition, the proposed velocity synchronization method can decrease the frictional force resulting from the velocity difference between the rollers and steel plate. The effectiveness of the proposed methods was demonstrated through simulations and experiments using a 1/40 downscaled hot rolling simulator. The simulations and experimental results demonstrate that the proposed methods can reduce the magnitudes of friction and impact forces that lead to scratch formation on the steel plates in the hot rolling process.

Microstructure and Mechanical Properties of Mg-Li Powder by Hot Rolling Process

2015 ◽  
Vol 25 (1) ◽  
pp. 32-36
Author(s):  
Jeong-Won Choi ◽  
Yong-Ho Kim ◽  
Jung-Han Kim ◽  
Hyo-Sang Yoo ◽  
Kee-Do Woo ◽  
...  
Keyword(s):  
Mechanical Properties ◽  
Hot Rolling ◽  
Rolling Process ◽  
Hot Rolling Process ◽  
Microstructure And Mechanical Properties

Effects of Phosphorus on Microstructure and Mechanical Properties in NiCr Alloys

2018 ◽  
Vol 913 ◽  
pp. 141-149
Author(s):  
Xin Tong Lian ◽  
Wen Ru Sun ◽  
Xin Xin ◽  
Dan Dan Zheng ◽  
Shou Ren Guo
Keyword(s):  
Mechanical Properties ◽  
Yield Strength ◽  
Hot Rolling ◽  
Driving Force ◽  
Rolling Process ◽  
Hot Rolling Process ◽  
Microstructure And Mechanical Properties ◽  
Cast Alloys ◽  
Impact Energies ◽  
Dendritic Structures

Microstructure and mechanical properties of Ni-Cr alloys with various contents of Phosphorus (P) have been investigated. It is found that the increase of phosphorus refined dendritic structures in as-cast alloys and decreased micro-segregation of Chromium (Cr) element. α-Cr which precipitated during hot-rolling process was obviously inhibited by phosphorus because of its prior occupancy on grain boundaries and decreasing precipitation driving force of α-Cr. Tensile and impact properties were examined on samples under different heat treatments. Though the yield strength of as-rolled alloys was increased by precipitation of α-Cr, the elongation and impact energies were reduced. It is worthy to note that impact energies of samples solutioned at 950°C increased with the increasing phosphorus. The results indicated that dislocations are markedly effected by phosphorus which is probably the reason for improving impact energies.

Interface Microstructure and Properties of 304 Austenite Stainless Steel/Low Carbon Steel Clad Plate by Casting and Hot Rolling Process

2014 ◽  
Vol 852 ◽  
pp. 178-182
Author(s):  
Shuo Li ◽  
Di Tang ◽  
Hui Bin Wu ◽  
Ji Guang Xiong
Keyword(s):  
Mechanical Properties ◽  
Stainless Steel ◽  
Carbon Steel ◽  
Hot Rolling ◽  
Low Carbon Steel ◽  
Rolling Process ◽  
Low Carbon ◽  
Interface Shear ◽  
Austenite Stainless Steel ◽  
Hot Rolling Process

The 304 austenite stainless steel and low carbon steel clad plate was fabricated by casting and hot rolling process. The mechanical properties and interface shear strength of clad plates with different thickness after rolling were investigated in detail. The microstructure characteristics of the clad interface were observed by SEM (Scanning Electron Microscope). The phases and chemical composition were analyzed by XRD (X-ray diffraction) and EDS (energy dispersive spectroscopy). Based on the results, the mechanical properties and interface shear strengths meet the requirements of national standards. No visible cracks were observed in the clad interface after bending test. Cr3C2precipitates, Fe3O4oxides and Fe-Cr intermetallic compound were distributed around the interface of clad plate after casting, but a good metallurgical bonding was achieved after hot-rolling.

Sign in / Sign up

Export Citation Format

Share Document