1. A high-strength hot-rolled steel sheet, superior in workability, fatigue property, and surface quality, said high-strength hot-rolled steel sheet consisting essentially of:
C in a range of 0.03 to 0.15 mass %;
Mn in a range of 0.5 to 2 mass %;
Al in a range of 0.01 to 0.1 mass %;
P in a range of 0.038 to 0.072 mass %; and
Cr in a range of 0.4 to 0.91 mass %, respectively, while controlling S to not more than 0.02 mass % (0% included), and Si to not more than 0.1 mass % (0% included),
wherein a metallic structure has polygonal ferrite as the main phase, and contains martensite as a second phase; and
wherein the high-strength hot-rolled steel sheet does not contain Nb and Ti.
2. The high-strength hot-rolled steel sheet according to claim 1, wherein the polygonal ferrite is not less than 75% in terms of volume fraction.
3. The high-strength hot-rolled steel sheet according to claim 1, wherein the martensite is in a range of 3 to 20% in terms of volume fraction.
4. The high-strength hot-rolled steel sheet according to claim 1, further containing at least either of Ni in a range of 0.1 to 1 mass %, and Cu in a range of 0.1 to 1 mass %, as other elements.
5. The high-strength hot-rolled steel sheet according to claim 1, further containing Co in a range of 0.01 to 1 mass % as another element.
6. The high-strength hot-rolled steel sheet according to claim 1, further containing Ca at not more than 0.005 mass % (0% not included) as another element.
7. The high-strength hot-rolled steel sheet according to claim 1, further containing at least one element selected from the group consisting of V in a range of 0.01 to 0.5 mass %, Mo in a range of 0.05 to 1 mass %, and B in a range of 0.0003 to 0.01 mass %, as other elements.
8. A method of making a high-strength hot-rolled steel sheet, the method comprising
rolling into a sheet a steel containing C, Mn, Al, P and Cr; and
producing the steel sheet of claim 1.
The claims below are in addition to those above.
All refrences to claim(s) which appear below refer to the numbering after this setence.
1. A method for determining the date and time comprising:
utilizing a wavepacket transmitter to measure the oscillation of the group velocity over a specified period of time, determining the Doppler redshift direction from said group velocity oscillation, and comparing said Doppler redshift direction verse the Earth’s motion
wherein the wavepacket transmitter comprises:
a transmission source for generating a wavepacket, the wavepacket comprising a wavefront component;
a signal controller for generating a signal pulse;
a signal receiver for receiving the signal pulse;
a selective-transmission device comprising a quantum barrier defining a transmission distance, said selective-transmission device being in signal communication with the transmission source, the signal controller, and the receiver such that the wavepacket is transmitted to the barrier and the wavefront component of the wavepacket tunnels through the barrier and across the transmission distance to the receiver; and
a monitor in signal communication with the receiver for determining the centroid time for each of a plurality of wavepacket peaks; and
an analyzer for computing the vector group velocity of light from the measured centroid times.
2. A method for determining the time and date comprising:
utilizing a wavepacket transmitter to compare the direction of the cosmic microwave background Doppler red shift relative to the Earth’s motion;
wherein the comparison includes determining the direction of the cosmic microwave background Doppler redshift by using the wavepacket transmitter to measure the oscillation of group velocity over a specified period of time and determining the group velocity minimum
wherein the wavepacket transmitter comprises:
a transmission source for generating a wavepacket, the wavepacket comprising a wavefront component;
a signal controller for generating a signal pulse;
a signal receiver for receiving the signal pulse;
a selective-transmission device comprising a quantum barrier defining a transmission distance, said selective-transmission device being in signal communication with the transmission source, the signal controller, and the receiver such that the wavepacket is transmitted to the barrier and the wavefront component of the wavepacket tunnels through the barrier and across the transmission distance to the receiver; and
a monitor in signal communication with the receiver for determining the centroic time for each of a plurality of wavepacket peaks; and
an analyzer for computing the vector group velocity of light from the measured centroid times.
3. A wavepacket transmission device, comprising:
a transmission source for generating a wavepacket, the wavepacket comprising a wavefront component;
a signal controller for generating a signal pulse;
a signal receiver for receiving the signal pulse;
a selective-transmission device comprising a quantum barrier defining a transmission distance, said selective-transmission device being in signal communication with the transmission source, the signal controller, and the receiver such that the wavepacket is transmitted to the barrier and the wavefront component of the wavepacket tunnels through the barrier and across the transmission distance to the receiver; and
a monitor in signal communication with the receiver for determining the centroid time for each of a plurality of wavepacket peaks; and
an analyzer for computing the vector group velocity of light from the measured centroid times;
wherein the analyzer further determines the cosmic microwave background Doppler red shift direction by monitoring the group velocity tunneling time oscillation over a specified period of time and determining the group velocity tunneling time minimum.
4. The wavepacket transmission device as described in claim 3, wherein the analyzer further determined the date and time by computing the cosmic microwave background Doppler red shift direction relative to the Earth’s motion.
5. A wavepacket transmission device, comprising:
a transmission source for generating a wavepacket, the wavepacket comprising a wavefront component;
a signal controller for generating a signal pulse;
a signal receiver for receiving the signal pulse;
a selective-transmission device comprising a quantum barrier defining a transmission distance, said selective-transmission device being in signal communication with the transmission source, the signal controller, and the receiver such that the wavepacket is transmitted to the barrier and the wavefront component of the wavepacket tunnels through the barrier and across the transmission distance to the receiver; and
a monitor in signal communication with the receiver for determining the centroid time for each of a plurality of wavepacket peaks; and
an analyzer for computing the vector group velocity of light from the measured centroid times;
wherein the selective transmission device is rotatable about an axis such that the direction of the wavepacket transmission may be shifted about the axis; and
wherein the analyzer further determines the cosmic microwave background Doppler red shift direction by monitoring the group velocity tunneling time oscillation as the direction of the wavepacket transmission is shifted about the rotatable axis and determining the group velocity tunneling time minimum.