The austempering after hot roiling in hot roiled Si-Mn TRIP （transformation-induced plasticity） steels was investigated. The mechanism of TRIP was discussed through examination of the microstructure and the mechanic...The austempering after hot roiling in hot roiled Si-Mn TRIP （transformation-induced plasticity） steels was investigated. The mechanism of TRIP was discussed through examination of the microstructure and the mechanical properties of this kind of steel. The results showed that the strain induced transformation to martensite of retained austenite occurs in hot rolled Si-Mn TRIP steels. The sample exhibited a good combination of ultimate tensile strength and total elongation when it was held at the bainite transformation temperature after hot deformation. The stability of retained austenite increases with an increase in isothermal holding time, and a further increase in the hold- ing duration resulted in the decrease of stability. The mechanical properties were optimal when holding for 25 min, and tensile strength and total elongation reached the maximum values （774 MPa and 33 ;, respectively）.展开更多
Based on 31 fabric property parameters tested by FAST test system and other test instruments, the principal factors of fabric style are obtained through the principal factor analysis method and computer program. Accor...Based on 31 fabric property parameters tested by FAST test system and other test instruments, the principal factors of fabric style are obtained through the principal factor analysis method and computer program. According to the correlation between each parameter and principal factor, the selected positive or negative coefficient, the objective evaluation model of fabric style has been established based on the percentage of variance. And wool fabrics have been taken for example to show how to use the objective evaluation model for fabric design.展开更多
In this paper, study objects are raw and dilative tussah silk. By means of measuring and analyzing the fiber's diameter, linear density, diameter coefficient, thickness and fullness, this paper focuses on the infl...In this paper, study objects are raw and dilative tussah silk. By means of measuring and analyzing the fiber's diameter, linear density, diameter coefficient, thickness and fullness, this paper focuses on the influence of dilative technology on tussah silk's fiber and fabric. The results include the following three aspects: the diameter coefficient of dilative tussah silk fiber is increased by 10.35%, dilative tussah heather silk is thicker and fabric fullness is improved by 9%.展开更多
基金Item Sponsored by National Natural Science Foundation of China (50334010)
文摘The austempering after hot roiling in hot roiled Si-Mn TRIP （transformation-induced plasticity） steels was investigated. The mechanism of TRIP was discussed through examination of the microstructure and the mechanical properties of this kind of steel. The results showed that the strain induced transformation to martensite of retained austenite occurs in hot rolled Si-Mn TRIP steels. The sample exhibited a good combination of ultimate tensile strength and total elongation when it was held at the bainite transformation temperature after hot deformation. The stability of retained austenite increases with an increase in isothermal holding time, and a further increase in the hold- ing duration resulted in the decrease of stability. The mechanical properties were optimal when holding for 25 min, and tensile strength and total elongation reached the maximum values （774 MPa and 33 ;, respectively）.
文摘Based on 31 fabric property parameters tested by FAST test system and other test instruments, the principal factors of fabric style are obtained through the principal factor analysis method and computer program. According to the correlation between each parameter and principal factor, the selected positive or negative coefficient, the objective evaluation model of fabric style has been established based on the percentage of variance. And wool fabrics have been taken for example to show how to use the objective evaluation model for fabric design.
文摘In this paper, study objects are raw and dilative tussah silk. By means of measuring and analyzing the fiber's diameter, linear density, diameter coefficient, thickness and fullness, this paper focuses on the influence of dilative technology on tussah silk's fiber and fabric. The results include the following three aspects: the diameter coefficient of dilative tussah silk fiber is increased by 10.35%, dilative tussah heather silk is thicker and fabric fullness is improved by 9%.
