Title:
HIGH STRENGTH ALLOY
Kind Code:
A1


Abstract:
A high strength alloy comprises: silicon with a weight percentage of 0.1 wt %˜0.5 wt %; manganese with a weight percentage of 0.3 wt %˜1.2 wt %; carbon with a weight percentage of 2.0 wt %˜3.0 wt %; phosphorous and sulfur with weight percentages of 0.01 wt %˜0.05 wt %, respectively; chromium with a weight percentage of 5.0 wt %˜7.0 wt %; molybdenum with a weight percentage of 3.0 wt %˜4.0 wt %; tungsten with a weight percentage of 1.0˜2.0; niobium with a weight percentage of 0.5 wt %˜1.7 wt %; vanadium with a weight percentage of 5.8 wt %˜7.8 wt %; nitrogen with a weight percentage of 0.04 wt %˜0.12 wt %; iron; other elements and impurities with a weight percentage of below 2 wt %



Inventors:
Hsieh, Chih-ching (Taichung City, TW)
Application Number:
11/766113
Publication Date:
07/16/2009
Filing Date:
06/21/2007
Primary Class:
Other Classes:
420/10
International Classes:
C22C38/36
View Patent Images:



Primary Examiner:
IP, SIKYIN
Attorney, Agent or Firm:
Chien-Hui Su (Taichung City, TW)
Claims:
What is claimed is:

1. A high strength alloy, comprising: silicon (Si) with a weight percentage of 0.1 wt %˜0.5 wt %; manganese (Mn) with a weight percentage of 0.3 wt %˜1.2 wt %; carbon (C) with a weight percentage of 2.0 wt %˜3.0 wt %; phosphorous (P) with a. weight percentage of 0.01 wt %˜0.05 wt %; sulfur (S) with a weight percentage of 0.01 wt %˜0.05 wt %; chromium (Cr) with a weight percentage of 5.0 wt %˜7.0 wt %; molybdenum (Mo) with a weight percentage of 3.0 wt %˜4.0 wt %; tungsten (W) with a weight percentage of 1.0˜2.0; niobium (Nb) with a weight percentage of 0.5 wt %˜1.7 wt %; vanadium (V) with a weight percentage of 5.8 wt %˜7.8 wt %; nitrogen (N) with a weight percentage of 0.04 wt %˜0.12 wt %; iron; other elements and impurities with a weight percentage of below 2%

2. The high strength alloy as claimed in claim 1, wherein the containment of silicon is 0.3 wt %; the containment of manganese is 0.75 wt %, the containment of carbon is 2.44 wt %; the containment of phosphorous is 0.03 wt %; the containment of sulfur is 0.03 wt %; the containment of chromium is 6.0 wt %; the containment of molybdenum is 3.4 wt %; the containment of tungsten is 1.6 wt %; the containment of niobium is 1.1 wt %; the containment of vanadium is 6.8 wt %; the containment of nitrogen is 0.08 wt %; the containment of other metals and impurities are below 1 wt %.

3. The high strength alloy as claimed in claim 2, wherein oxygen containment in the other components and impurities is below 0.009 wt %.

Description:

FIELD OF THE INVENTION

The present invention relates to alloys, and particularly to an alloy has preferred hardness and flexibility. The alloy of the present invention has preferred properties in anti-wearing so that the symbols, trademarks, scales, textures on the surfaces of the alloy will prevent from wearing and thus can be identified easily and have a long lifetime.

BACKGROUND OF THE INVENTION

Generally, metals are highly in strength and flexibility without deformation and twisting and difficult to wear. Thus metals are used in the applications for resisting strong stress and are widely used in the daily life.

Furthermore, the physical properties of the metals further comprises such as electric conductivity, thermal conductivity, and highly light reflectivity. However as the metals are used in the working tools, the properties of high strength and high flexibility without deformation and twisting and being difficult to wear are main concerns so that the tool can prevent from anti-reaction force and without deformation and twisting. Furthermore, in use or carrying, the tools can prevent from the wearing of the environment. Furthermore, such kind of metal tools is superior in applications and is competitive in the market.

Some additives are added to the metals as alloys so as to have preferred properties, for example adding iron to the metal. Other metals are used as additives, such as manganese (Mn), molybdenum (Mo), tungsten (W), niobium (Nb), vanadium (V), chromium (Cr), etc. These metals will generate apparent variations to the properties of the alloy. Thus to have a preferred property, many tests and experiments are necessary so as to balance all physical characteristics to have a preferred features. Thereby this is a very difficult work and thus many bad metal alloys are still used in making working tools.

SUMMARY OF THE INVENTION

Accordingly, the primary object of the present invention is to provide an alloy has preferred hardness and flexibility which are better than the prior art alloys. The alloy the present invention is good in anti-wearing so that the symbols, trademarks, scales, textures on the surfaces of the alloy will prevent from wearing so that they can be identified easily and have a long lifetime.

To achieve above objects, the present invention provides a high strength alloy, comprising: silicon (Si) with a weight percentage of 0.1 wt %˜0.5 wt %; manganese (Mn) with. a weight percentage of 0.3 wt˜% 1.2 wt %; carbon (C) with a weight percentage of 2.0 wt %˜3.0 wt %; phosphorous (P) with a weight percentage of 0.01 wt %˜0.05 wt %; sulfur (S) with a weight percentage of 0.01 wt %˜0.05 wt %; chromium (Cr) with a weight percentage of 5.0 wt %˜7.0 wt %; molybdenum (Mo) with a weight percentage of 3.0 wt %˜4.0 wt %; tungsten (W) with a weight percentage of 1.0˜2.0; niobium (Nb) with a weight percentage of 0.5 wt %˜1.7 wt %, vanadium (V) with a weight percentage of 5.8 wt %˜7.8 wt %; nitrogen (N) with a weight percentage of 0.04 wt %˜0.12 wt %; iron; other elements and impurities with a weight percentage of below 2%

Moreover, in the present invention, the containment of silicon is 0.3 wt %; the containment of manganese is 0.75 wt %, the containment of carbon is 2.44 wt %; the containment of phosphorous is 0.03 wt %; the containment of sulfur is 0.03 wt %; the containment of chromium is 6.0 wt %; the containment of molybdenum is 3.4 wt %; the containment of tungsten is 1.6 wt %; the containment of niobium is 1.1 wt %; the containment of vanadium is 6.8 wt %; the containment of nitrogen is 0.08 wt %; the containment of other metals and impurities are controlled by be below 1 wt %.

Oxygen containment in the other components and impurities are below 0.009 wt %.

The various objects and advantages of the present invention will be more readily understood from the following detailed description when read in conjunction with the appended drawing.

BRIEF DESCRIPTION OF THE DRAWINGS

FIG. 1 shows the component ratios of the high strength alloy of the present invention.

FIG. 2 shows a comparison of the present invention with other prior art alloy in the property of anti-bending.

FIG. 3 shows a comparison of the present invention with other prior art alloy in the property of anti-beating.

FIG. 4 shows a comparison of the present invention with other prior art alloy in the property of anti-wearing.

DETAILED DESCRIPTION OF THE INVENTION

In order that those skilled in the art can further understand the present invention, a description will be provided in the following in details. However, these descriptions and the appended drawings are only used to cause those skilled in the art to understand the objects, features, and characteristics of the present invention, but not to be used to confine the scope and spirit of the present invention defined in the appended claims.

The object of the present invention is to provide a high strength alloy assembly which has a preferred hardness, a lower flexibility, and is anti-deformation, anti-twisting, anti-wear with a preferred tolerance.

The components of the present invention are silicon (Si) with a weight percentage of 0.1 wt %˜0.5 wt %; manganese (Mn) with a weight percentage of 0.3 wt %˜1.2 wt %; carbon (C) with a weight percentage of 2.0 wt %˜3.0 wt %; phosphorous (P) with a weight percentage of 0.01 wt %˜0.05 wt %; sulfur (S) with a weight percentage of 0.01 wt %˜0.05 wt %; chromium (Cr) with a weight percentage of 5.0 wt %˜7.0 wt %; molybdenum (Mo) with a weight percentage of 3.0 wt %˜4.0 wt %; tungsten (W) with a weight percentage of 1.0˜2.0; niobium (Nb) with a weight percentage of 0.5 wt %˜1.7 wt %; vanadium (V) with a weight percentage of 5.8 wt %˜7.8 wt %; nitrogen (N) with a weight percentage of 0.04 wt %˜0.12 wt %; iron; other elements and impurities with a weight percentage of below 2% Moreover, the containment of nitrogen in the other elements and impurities are below 0.002 wt %

Preferably, the containment of carbon is 2.44 wt % so that the alloy has preferred hardness and flexibility. Less carbon will reduce the hardness and too many carbons will reduce the flexibility of the alloy. Preferably, the containments of vanadium and niobium are 6.8 wt % and 1.1 wt %, respectively so as to form a single carbon chemical compound.

The carbon compound will affect the carbon crystal. The addition of vanadium and niobium has the advantage of forming a single carbon compound with preferred strength. Preferably, the containment of vanadium is 6.8 wt % and the containment of niobium is 1.1 wt %. Other carbons not reacting with the vanadium and niobium will easily react with the tungsten, manganese, chromium, molybdenum, and other metals.

Other than the effect of preferred hardness to increase the structural strength of the alloy, when the tungsten is reacted with carbon, they will generate mixing carbon compound which has preferred crystallized effect Preferably, the containment of tungsten is 1.6 wt %. Preferably, the containment of manganese is 0.75 wt %; the containment of chromium is 6.0 wt %; the containment of molybdenum is 3.4 wt %. By this optimum ratio, the metal can be sufficient reacted with the carbon so as to have preferred alloy.

Other metals serve to suppress the chemical reaction ability, increase the acid-tolerant ability and fire-tolerant ability. The containment of each of other metals is not suitable to be over 0.15 wt %. Preferably, the containment of silicon is 0.3 wt %; the containment of phosphorous is 0.3 wt %; the containment of sulfur is 0.3 wt % and the containment of nitrogen is 0.8 wt %.

To avoid that the other elements and impurities to change the physical property of the alloy so as to reduce the original strength, the containment of other metals and impurities are controlled by be below 1 wt %. The oxygen containment in the other components and impurities are preferably below 0.009 wt %. Other component not described above is iron.

Referring to the table in FIG. 1, in the sample 6 of the FIG. 1, wherein the containment of silicon is 0.3 wt %; the containment of manganese is 0.75 wt %, the containment of carbon is 2.44 wt %; the containment of phosphorous is 0.03 wt %; the containment of sulfur is 0.03 wt %; the containment of chromium is 6.0 wt %; the containment of molybdenum is 3.4 wt %; the containment of tungsten is 1.6 wt %; the containment of niobium is 1.1 wt %; the containment of vanadium is 6.8 wt %; the containment of nitrogen is 0.08 wt %; the containment of other metals and impurities are controlled by be below 1 wt %. The oxygen containment in the other components and impurities are preferably below 0.009 wt %. Other components not described above is iron.

Referring to FIGS. 2 to 4, the present invention (sample 6) is compared with samples 1 to 5 and samples 7 to 11 which are used in the prior art. The anti-bending, anti-beating and anti-wearing are used as comparison coefficients. The properties of anti-bending and anti-beating are helpful to cause the alloy to prevent from deformation due to external force. The anti-wearing is helpful to cause the alloy to resist the wearing from other object. Referring to FIGS. 2 and 3, it is known that the alloy of the present invention has preferred hardness and flexibility than the prior art alloy. FIG. 4 shows that the alloy the present invention is good anti-wearing ability so that the symbols, trademarks, scales, textures on the surfaces of the alloy will prevent from wearing so that they can be identified easily and have a long time effect.

The present invention is thus described, it will be obvious that the same may be varied in many ways. Such variations are not to be regarded as a departure from the spirit and scope of the present invention, and all such modifications as would be obvious to one skilled in the art are intended to be included within the scope of the following claims.