Composition Design and Microstructure Analysis of Titanium Microalloyed New Die Steel
Journal Title: 河南科技大学学报(自然科学版) - Year 2019, Vol 40, Issue 5
Abstract
JMatPro software was used to simulate the H13 steel with different mass fraction Ti. According to the calculation results, the new mold steel with different Ti mass fraction was designed. The mechanical properties and microstructure of H13 steel with different Ti mass fraction after heat treatment were analyzed. The results show that it is reasonable to add Ti element mass fraction less than 0.600%. The tensile strength, hardness and plasticity of H13 steel containing trace Ti increase first and then decrease with the increasing of Ti content after quenching and tempering at room temperature. The performance achieves the best when the mass fraction of Ti is 0.127%. The maximum tensile strength and hardness at room temperature are 1 788 MPa and 51.5 HRC, respectively. Compared with H13 steel without Ti, it increases 264 MPa and 3. 7HRC respectively, and the reduction of area increases from 35.0% to 47.0%. The quenching and tempering micro structure of H13 steel with Ti mass fraction of 0%, 0.044% and 0.127% respectively is a mixture micro structure of tempered sorbite and tempered troostite. The quenching and tempering micro structure of H13 steel with Ti mass fraction of 0.325% and 0.536% is tempered sorbite.
Authors and Affiliations
Yongjian WANG, Yanmin ZHANG, Yaoli WANG, Kexing SONG, Yunfei WANG
Blowup for Classical Solutions of n-Dimensional Euler Equations with Nonlinear Damping
The blowup of classical solutions for initial value of the isentropic Euler equations with nonlinear damping in n-dimensional space was studied. When the initial condition had compact support,by functional methods,the cl...
Experimental Study of Vertical Mechanical Properties of Scrap Tire Pads
The vertical mechanical experiments of scrap tire pads ( STP) made of three common tire types of all season tire and snow tire were conducted.The effects of width, length and types of tire on the vertical ultimate streng...
Method of Determining Design Time Based on Similarity Degree of Products
To solve the problems that product design time was difficult to be forecasted accurately and traditional estimation methods had large error, a design time estimation method was proposed based on similarity degree of prod...
Effects of Salicylic Acid on Seed Germination of Prunella Vulgaris under Drought Stress
Prunella vulgaris seeds were presoaked with different concentrations( 0. 5 ~ 3. 0 mmol / L) salicylic acid( SA). Then Prunella vulgaris seeds were soaked in 0. 2 g / mL polyethylene glycol 6000 for simulating drought str...
Failure Mechanism of Joints Between New Type Concrete-filled Steel Tubular with Special-shaped Columns and Steel Beams
According to the experimental research of the concrete-filled steel tubular special-shaped joints with interior diaphragm,the failure process and the load-steel web strain hysteretic curves were analyzed,and the failure...