JPS5891154A - High tensile amorphous fe-cr alloy - Google Patents

Abstract

PURPOSE:To obtain an amorphous Fe-Cr alloy with enhanced heat resistance and mechanical strength by specifying the amounts of Cr, C, B, C+B, P and C+B+ P in an Fe-Cr alloy. CONSTITUTION:A molten alloy is sprayed on the inside of a drum rotating at a high speed in an inert atmosphere and cooled at a very high cooling rate to obtain an amorphous alloy. At this time, the alloy is composed of, by atom, 1- 40% Cr, >=0.01% C, >=0.10% B (C+B=2-35%), >0-33% P (C+B+P=7-35%) and the balance Fe. Less than the lower limit of Cr produces an insignificant effect of improving the heat resistance, and in case of more than the upper limit of Cr, it is difficult to obtain the amorphous alloy. By adding said amount of P, the lower limit of C+B enabling the formation of the amorphous structure can be lowered. Only when the amount of C+B is within said range, the amount of P does not exceed the upper limit, and the amount of C+B+P is within said range, the amorphous alloy is obtd.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a high strength Fe-Or thread amorphous alloy with excellent heat resistance.

Tsutomukin is in a crystalline state in the solid state, but under certain special conditions (composition of the alloy, rapid solidification), an atomic structure similar to that of a liquid that does not have a crystal structure can be obtained even in the solid state. ,
Amorphous amalgamation (or amorphous alloy) of such alloys
100.

) Amorphous alloys have a higher
Possesses extremely high strength. - When used as a practical metal, it may be used not only at room temperature but also at elevated temperature, and an amorphous alloy changes to a crystalline metal or alloy at a certain temperature depending on its composition. It has a crystallization temperature. When an amorphous alloy crystallizes, it loses its properties as an amorphous alloy. Therefore, when used in such a wet state, it is necessary that the crystallization temperature is as high as possible.

The present invention aims to improve heat resistance (
The object of the present invention is to provide an amorphous chromium alloy with improved crystallization resistance and improved mechanical strength.

In the present invention, Or 1 to 4o atomic %, C and B in total 2
-85 at%, P88 or less, containing a total of 7 to 85 at% of C, B, and P, and the balance being B'e. High strength Fe-Or yarn amorphous alloy with excellent heat resistance. .

In previous research leading to the present invention, the present inventor discovered that Qr1-4
0 atomic%, 0 and B] Yuzu is quenched with 2117 L% or more, P5Ji% or more, one of C and B, and P in total of 15 to 801JA% martyred part F8. All findings indicate that a completely amorphous alloy can be obtained by solidification.

However, in the research of the present invention, a total of 2 C and B
~85 atomic% P is 88yA 1,000% or less and 0.8 and P
It has been found that a completely amorphous alloy can be produced by containing a total of 7 to 85% of the alloy, and that the mechanical properties can be further improved.

Next, a method for manufacturing the amorphous alloy of the present invention will be explained with reference to the drawings.

The figure is a schematic diagram showing an example of an apparatus for producing the amorphous alloy of the present invention. In the figure, reference numeral 1 denotes a quartz tube having a nozzle 2 at its lower end that ejects water in a horizontal direction, into which raw metal 8 is charged and melted. 4 is a heating furnace for heating the raw material W48, and 5 is a rotating drum rotated by a motor 6 at a high speed, for example, 5000 rpm, in order to minimize the centrifugal force load due to the rotation of the drum. 08, which has a light lid and is made of a metal with good heat conductivity, such as an aluminum alloy, and whose inner surface is lined with a metal with good heat conductivity, such as a copper plate 7, is used to support the quartz tube l and move it up and down. It is an air piston. The raw metal is first charged through the inlet port 1a of the quartz tube 1 by fluid conveyance, etc., and heated and melted in the heating furnace 4, and then the nozzle 2 is placed in the quartz tube by an air piston 8 so that the nozzle 2 faces the inner surface of the rotating drum 5. 1 is lowered to the position shown in the figure, and then at about the same time as it begins to rise, gas pressure is applied to melting basin jI4B, causing metal to be jetted toward the inner surface of the rotating drum. In order to prevent the oxidation of the gold@8, an inert gas such as argon gas 9 is constantly fed into the quartz tube to create an inert atmosphere. Due to the centrifugal force caused by the high-speed rotation, the metal jetted onto the inner surface of the rotating drum is brought into strong contact with the inner surface of the rotating drum, and is cooled at an ultra-high speed, turning into an amorphous alloy.

By such a method, the Fe-Or-P yarn amorphous alloy of the present invention can be obtained as a long tape-like wire with a thickness of, for example, 0.11111 mm and a length of about 1081 mm.

In the research of the present invention, an amorphous alloy having a composition shown in Table 1 was prepared with a thickness Q,
Created in Q5m, length 0.5 dragon.

1 of Table 1 (atomic percent) When this is converted into weight, it is as shown in 2 in Table 1.

Table 2 shows the results of tests on mechanical properties of these strips. For comparison, high Qr type sunless 40
5 @ (1a%Qr, 0.2%AJ) (73 Mechanical properties are listed in A15.

Table 2 As can be seen from Table 2, sample 414, which contains as much B as 20% of the A1 to 14 samples, has a yield strength of 4 (10Ic9/ It has the highest hardness of 1050 Hv, which is superior to piano wire, which has the highest strength among conventional steels.

Table δ Table 8 shows the crystallization temperature ('C) of various alloys of the present invention shown in the fs1 table above, Fe-0-P which does not contain cr.
In contrast to the crystallization temperature of about 410"0 for amorphous alloys of the Fe-B-P series and the Fe-B-P series, the crystallization temperature of the alloy of the present invention increases as the Or content increases, and the Or
At 40 atom%, the temperature reaches 510°C.

The reasons for limiting the components in the alloy of the present invention will be described below.

Or has the effect of improving the mechanical properties and heat resistance of an amorphous alloy, and if it is less than 1 atomic %, the effect is small, while if it exceeds 40 atomic %, it is difficult to obtain an amorphous alloy even if it is rapidly solidified.

It has been found that by containing 88 atoms or less of P, the lower limit of the composition range of the total amount of C and B that can form an amorphous structure can be further lowered.

In this case, the reason for limiting the total amount of O and B to 2 to 85 at% is that an amorphous alloy cannot be obtained when the total amount of O and B is less than 2@85 at%, and the total amount of both elements is 85 at%. %, an amorphous alloy cannot be obtained.

If P exceeds 88 atomic %, an amorphous alloy cannot be obtained.

Although the total amount of C, B and P is limited to 7 to 85 atomic%,
If this total amount is less than 7 at %, an amorphous alloy cannot be obtained, and if the total amount exceeds 85 at %, an amorphous alloy cannot be obtained. Next, examples of the present invention will be described.

Example] C3lIK%, B55 atom, P20 atom%, (Hr1
An alloy having a completely amorphous structure could be obtained by the above manufacturing method using a blended material consisting of 0 atomic percent Fe as a raw material. Among the mechanical properties of this alloy, the yield strength is 85 G +19/la", and the fracture strength is 40071.
9/m”, elongation 0.01%, hardness g (H,) 95
0, it had extremely superior mechanical properties compared to high Qr stainless steel, and had a crystallization temperature of 480° C. and excellent heat resistance.

As described above, the Fe-Or-based amorphous composite material of the present invention has the advantage that the addition of chromium not only increases the strength but also increases the heat resistance. On the other hand, the addition of O and B is necessary to form an amorphous alloy, and by further adding P to these, the lower limit of the content range of the total amount of C and B can be expanded. On the other hand, C and P
It is particularly advantageous in industrial production that the rapid solidification conditions can be relaxed to some extent compared to the case where B, or B and P are added. That is, an amorphous alloy with excellent mechanical strength can be obtained within the composition range of the present invention. The amorphous alloy of the present invention can be manufactured as thin strips and has high strength that cannot be obtained with conventional practical metal materials. Therefore, the amorphous alloy of the present invention is suitable for products that require high strength and heat resistance, such as tires for wheels, rubber such as belts, reinforcing hoods embedded in plastic products, and cords embedded in concrete. It is also suitable for uses such as filters, screens, and filaments for blending with fibers.

[Brief explanation of the drawing]

The figure is a schematic diagram showing an example of an apparatus for producing the amorphous alloy of the present invention. 1... Stone EW 2... Nozzle 8...
4 for raw materials 4... Heating furnace 5... Rotating drum 6 River motor 7... Copper plate 8
...Air piston 9...Argon gas

Claims (1)

[Claims] Contains ar i ~ 40% as L atomic %, C and B in a total of 0601% or more and 2 to 85% and 288% or less, and O, B and P in a total of 7 to 85%. A high-strength Fe-Or-based amorphous alloy with excellent heat resistance, the balance being Fe.