TWI668040B - Composition alloy of golf iron head and method of making same - Google Patents

Abstract

An alloy of a golf iron head and a method of manufacturing the same, the alloy of the golf iron head comprising: 21.11 to 21.16 parts by weight of chromium, 5.38 to 5.43 parts by weight of nickel, 0.13 to 0.17 parts by weight of nitrogen, greater than zero and less than or It is equal to 0.09 parts by weight of carbon, 1.54 to 1.66 parts by weight of molybdenum, 1.57 to 1.64 parts by weight of bismuth, and 67.85 to 70.27 parts by weight of iron.

Description

Composition of golf iron head alloy and manufacturing method thereof

The invention relates to a composition alloy of a golf iron head and a manufacturing method thereof, in particular to a composition alloy of a golf iron head to which molybdenum and niobium are added and a manufacturing method thereof.

Golf is naturalized by the environment of the golf course and has a moderate amount of exercise. At the same time, it is a ball sport that emphasizes self-challenge. Its sports age can range from 5 to 90 years old, and it is one of the favorite sports of the majority. The golf clubs used in golf include woods, irons, pilling clubs, sand pits, push rods, etc. Each type of club has its own specific function and place of use.

Among the many types of golf clubs mentioned above, the irons are mainly used to hit the ball to the target point. The ball is characterized by a shorter flight distance than the wooden pole, but the ball can be hit higher. And the direction is easy to grasp, which is a common club in golf.

It is a conventional alloy for making a golf iron head. For example, the patent of the "Metal Alloy of Golf Iron Head" disclosed in Japanese Patent No. 200940126 discloses a composition alloy of a golf iron head comprising: 21.5 wt% to 24.5 wt%. Chromium, 4.45 wt% to 6.05 wt% nickel, 0.17 wt% to 0.23 wt% nitrogen, 1.5 wt% to 3.5 wt% copper, no more than 0.06 wt%, and a carbon content of not 0, and used to balance And iron with a content of not 0. In this patent, it is mainly to replace a part of the nickel content with copper. However, the alloy of this type of golf iron head still fails to pass the test standard when performing the angle adjustment test and the shelling test.

Therefore, it is necessary to provide a alloy of golf iron head and its alloy Manufacturing methods to solve problems in conventional technology.

An object of the present invention is to provide a composition alloy of a golf iron head and a method of manufacturing the same by adding a specific composition of molybdenum and niobium to pass the angle adjustment test and the shelling test.

To achieve the above object, the present invention provides a composition alloy of a golf iron head comprising: 21.11 to 21.16 parts by weight of chromium, 5.38 to 5.43 parts by weight of nickel, 0.13 to 0.17 parts by weight of nitrogen, greater than zero and less than or equal to 0.09 parts by weight of carbon, 1.54 to 1.66 parts by weight of molybdenum, 1.57 to 1.64 parts by weight of bismuth, and 67.85 to 70.27 parts by weight of iron.

In an embodiment of the invention, the alloy of the golf iron head further comprises more than zero and less than or equal to 0.05 parts by weight of copper.

In an embodiment of the invention, the alloy of the golf iron head further comprises 0.6 to 0.98 parts by weight of bismuth and 0.87 to 0.97 parts by weight of manganese.

In one embodiment of the invention, the alloy of the golf iron head has an average grain size of between 80 and 100 microns.

In one embodiment of the invention, the average grain size of the alloy of the golf iron head is between 88 and 92 microns.

In order to achieve the above object, the present invention further provides a method for manufacturing a composition alloy of a golf iron head, comprising the steps of: providing a plurality of raw materials comprising 21.11 to 21.16 parts by weight of chromium, 5.38 to 5.43 parts by weight of nickel, 0.13. To 0.17 parts by weight of nitrogen, greater than zero and less than or equal to 0.09 parts by weight of carbon, 1.54 to 1.66 parts by weight of molybdenum, 1.57 to 1.64 parts by weight of bismuth and 67.85 to 70.27 parts by weight of iron; a step of forming a liquid alloy, wherein a melting temperature of the melting step is between 1650 and 1660 ° C; and performing a casting step on the liquid alloy to form a constituent alloy of the golf iron head, wherein one of the casting steps The shell mold temperature is between 1180 and 1220 °C.

In an embodiment of the present invention, after the smelting step, further comprising performing a tempering step on the alloy of the golf iron head, wherein the tempering step The tempering temperature is between 680 and 700 ° C and the tempering time is between 50 and 70 minutes.

In an embodiment of the present invention, the smelting step further comprises adding 0.6 to 0.98 parts by weight of cerium and 0.87 to 0.97 parts by weight of manganese to reduce a residual gas in the liquid alloy.

In an embodiment of the invention, the materials further comprise greater than zero and less than or equal to 0.05 parts by weight of copper.

In one embodiment of the invention, the alloy of the golf iron head has an average grain size between 80 and 100 microns.

10‧‧‧ method

11~13‧‧‧Steps

Fig. 1 is a flow chart showing a method of manufacturing a constituent alloy of a golf iron head according to an embodiment of the present invention.

2A and 2B are schematic views of optical microscopes of Example 1 and Comparative Example 1.

The above and other objects, features and advantages of the present invention will become more <RTIgt; Furthermore, the directional terms mentioned in the present invention, such as upper, lower, top, bottom, front, rear, left, right, inner, outer, side, surrounding, central, horizontal, horizontal, vertical, longitudinal, axial, Radial, uppermost or lowermost, etc., only refer to the direction of the additional schema. Therefore, the directional terminology used is for the purpose of illustration and understanding of the invention.

The composition alloy of the golf iron head according to an embodiment of the present invention comprises: 21.11 to 21.16 parts by weight of chromium, 5.38 to 5.43 parts by weight of nickel, 0.13 to 0.17 parts by weight of nitrogen, more than zero and less than or equal to 0.09 parts by weight of carbon, 1.54 to 1.66 parts by weight of molybdenum, 1.57 to 1.64 parts by weight of rhodium, and 67.85 to 70.27 parts by weight of iron. It is to be noted that the alloy of the golf iron head according to the embodiment of the present invention is a high chromium component, and a specific composition range of molybdenum and niobium is added, thereby substantially not affecting the mechanical properties of the alloy of the golf iron head (for example, anti- Tensile strength Under the premise of the elongation, it can also pass the angle adjustment test and the shelling test.

In an embodiment, the alloy of the golf iron head of the embodiment of the present invention may further comprise greater than zero and less than or equal to 0.05 parts by weight of copper. In another embodiment, the alloy of the golf iron head of the embodiment of the present invention may further comprise 0.6 to 0.98 parts by weight of rhodium and 0.87 to 0.97 parts by weight of manganese. In yet another embodiment, the alloy of the golf iron head has an average grain size of between 80 and 100 microns, for example primarily comprising a Worthfield iron phase, and a minor inclusion of a makita iron phase. In one example, the average grain size of the alloy of the golf iron head is between 88 and 92 microns.

The following shows the general effects of each component as follows: Chromium: can increase the corrosion resistance and oxidation resistance of the alloy material, and can improve the hardening energy and high temperature strength of the alloy material, especially for the wear resistance of the high carbon steel.

Nickel: The Worthfield iron phase which increases the corrosion and oxidation resistance of the alloy material and stabilizes the face-centered cubic structure (FCC) of the alloy material.

Carbon and nitrogen: basically an indispensable element in general steel materials. In addition to carbides or nitrides, it is also an element required for the stable phase of Worthite iron. As the carbon and nitrogen content increases, the ferrite iron decreases. The more stable the steel is, the lower the carbon and nitrogen content will be detrimental to the corrosion resistance of the alloy material.

Molybdenum: Improves the resistance to pit corrosion, increases the strength of the steel without reducing the plasticity and toughness of the steel, and at the same time enables the steel to have sufficient strength at high temperatures to improve the cold brittleness and wear resistance of the steel. It is worth mentioning that in the embodiment of the present invention, at least the molybdenum of a specific composition range is added to pass the alloying test of the golf iron head through the angle adjustment test and the shelling test.

铌: It can refine the grain of steel, reduce the overheat sensitivity and temper brittleness of steel, improve the welding performance of steel, and improve the strength and corrosion resistance of heat resistant steel. It is worth mentioning that in the embodiment of the present invention, at least the enthalpy of the specific component range is added to pass the alloying test of the golf iron head through the angle adjustment test and the shelling test.

Iron: Mainly used as a matrix for alloys.

矽: Prevents the formation of pores in the alloy material, enhances the shrinkage effect and increases the fluidity of the molten steel.

Manganese: usually coexists with iron. Since manganese is easily combined with sulfur, it can eliminate the harmful effects of sulfur on the hot brittleness of the alloy material, and manganese can remove the oxide in the alloy material. In addition, manganese stabilizes the Worth iron of the FCC structure, which will help eliminate hot brittleness and improve castability.

Copper: It can be added in an appropriate amount to replace nickel, thereby reducing the ductility due to the nickel component.

It should be mentioned here that the alloy of the golf iron head of the embodiment of the present invention is at least by using a specific weight range of chromium (21.11 to 21.16 parts by weight), nickel (5.38 to 5.43 parts by weight), and nitrogen (0.13 to 0.17). Parts by weight), carbon (greater than zero and less than or equal to 0.09 parts by weight), molybdenum (1.54 to 1.66 parts by weight), hydrazine (1.57 to 1.64 parts by weight) and iron (67.85 to 70.27 parts by weight), so as to be obtained The alloy of the golf iron head can be tested by the angle adjustment test and the shelling test without substantially affecting the mechanical properties (such as tensile strength, lodging strength and elongation).

Referring to FIG. 1 , a method 10 for manufacturing a composition alloy of a golf iron head according to an embodiment of the present invention includes steps 11 to 13 : providing a plurality of raw materials comprising 21.11 to 21.16 parts by weight of chromium and 5.38 to 5.43 weight. Parts nickel, 0.13 to 0.17 parts by weight of nitrogen, greater than zero and less than or equal to 0.09 parts by weight of carbon, 1.54 to 1.66 parts by weight of molybdenum, 1.57 to 1.64 parts by weight of bismuth and 67.85 to 70.27 parts by weight of iron (step 11 Performing a melting step on the raw materials to form a liquid alloy, wherein a melting temperature of the melting step is between 1650 and 1660 ° C (step 12); and a casting step is performed on the liquid alloy to form the The alloy of the golf iron head, wherein the temperature of a shell mold of the casting step is between 1180 and 1220 ° C (step 13).

The method 10 for manufacturing a constituent alloy of a golf iron head according to an embodiment of the present invention is first performed in step 11: providing a plurality of raw materials comprising 21.11 to 21.16 parts by weight of chromium, 5.38 to 5.43 parts by weight of nickel, and 0.13 to 0.17 by weight. Parts of nitrogen, greater than zero and less than or equal to 0.09 parts by weight of carbon, 1.54 to 1.66 parts by weight of molybdenum, 1.57 to 1.64 parts by weight of bismuth and 67.85 to 70.27 parts by weight of iron. In this step 11, for example, copper may be contained greater than zero and less than or equal to 0.05 parts by weight.

The manufacturing method 10 of the alloy of the golf iron head according to the embodiment of the present invention is followed by the step 12: performing a melting step on the raw materials to form a liquid alloy, wherein a melting temperature of the melting step is between 1650 and 1660 ° C. between. In this step 12, the raw materials may be heated, for example, using a commercially available melting furnace to form the liquid alloy. In one embodiment, 0.6 to 0.98 parts by weight of cerium and 0.87 to 0.97 parts by weight of manganese may be added in the smelting step to reduce a residual gas in the liquid alloy. In another embodiment, a smelting time of the smelting step is between 30 and 90 minutes to form the homogeneous material into a homogeneous liquid alloy.

The method for manufacturing the alloy of the golf iron head according to an embodiment of the present invention is finally a step 13 of performing a casting step on the liquid alloy to form an alloy of the golf iron head, wherein a temperature of the shell mold of the casting step is introduced. Between 1180 and 1220 ° C. In this step 13, the temperature of the shell mold is mainly corresponding to the melting temperature, so as to prevent the shell mold receiving the liquid alloy from being unable to withstand an excessive temperature difference and being broken. In one embodiment, a casting time of the casting step is as short as possible, for example, the overall time of casting to the shell mold is between 10 and 30 seconds. In another embodiment, the alloy of the golf iron head formed after the casting step can be subjected to a cooling step in the atmosphere until the temperature of the alloy of the golf iron head is close to room temperature (for example, about 25 ° C). In an example, the cooling step is for example between 16 and 32 hours.

In an embodiment, after the smelting step, further comprising performing a tempering step on the alloy of the golf iron head, wherein a tempering time of the tempering step is between 50 and 70 minutes and one time The fire temperature range is between 680 and 700 °C. The tempering step can homogenize the crystal phase of the alloy of the golf iron head, which helps to stabilize the overall properties of the alloy of the golf iron head.

In one embodiment, the alloy of the golf iron head produced by the method for manufacturing the alloy of the golf iron head has an average grain size of between 80 and 100 micrometers, for example, mainly comprising Worthite iron. Phase, and minor inclusion There is a loose iron phase in Ma Tian. In one example, the average grain size of the alloy of the golf iron head is between 88 and 92 microns.

In the following, a plurality of embodiments and comparative examples are provided to specifically describe the alloy composition of the golf iron head obtained by the alloy of the golf iron head of the embodiment of the present invention or the method for manufacturing the alloy of the golf iron head of the embodiment of the present invention. It can pass the angle adjustment test and the shelling test.

Various examples and comparative examples

First, various raw materials of the respective examples and comparative examples are provided. For the detailed composition range, refer to the following Table 1, where bal. refers to the weight percentage of the balance material. Thereafter, each of the raw materials was subjected to a melting step at a melting temperature of about 1655 ° C until a liquid alloy was formed. Finally, a casting step is performed on the liquid alloy to form an alloy of the golf iron head, wherein the casting mold has a shell mold temperature of about 1200 °C. Thereafter, the mechanical properties of each of the examples were analyzed, and the results are shown in Table 2 below, in which the heat treatment was carried out separately for Example 1 and Comparative Example 1, and mechanical properties were analyzed. On the other hand, please refer to FIGS. 2A and 2B , which are schematic diagrams of optical microscopes of Example 1 and Comparative Example 1, respectively, wherein an average grain size of Example 1 is between 80 and 100 μm (for example, a grain) The size of the composite film of Comparative Example 1 was between 140 and 160 microns (e.g., the size of a grain was 146.25 microns).

From the above, the mechanical properties of Examples 1 to 3 and Comparative Examples 1 to 4 were substantially within the acceptable range. However, in Comparative Example 1 in which the tempering step was carried out for 1 hour, Example 1 which was subjected to the tempering step for 1 hour had higher tensile strength and lodging strength, and had lower elongation, which was helpful. Pass the subsequent angle adjustment test and shelling test.

The following experiments were carried out for the angle adjustment test and the shot test for Example 1 and Comparative Example 1 in which the tempering step was performed for 1 hour, as described below.

Angle adjustment test:

The purpose of the angle adjustment test is to test whether the alloy of the golf iron head is adjustable. This is because of the usage habits of different users. To adjust the bottom angle (LIE) and the tilt angle (LOFT) of the golf iron head, this can help the user to produce a higher impact (for example, the golf ball can be played farther). In the present adjustment test, in the case where the base angle and the inclination angle are adjusted to be 2 degrees or minus 2 degrees in the same manner, it is judged by the human eye that the appearance of the embodiment 1 does not have cracks or wrinkles, so that the determination of the embodiment 1 is passed. Angle adjustment test. Further, the same angle adjustment test was carried out for Comparative Example 1, and the appearance of Comparative Example 1 was judged by the human eye. Although Comparative Example 1 did not have a crack, the surface thereof was wrinkled, so Comparative Example 1 could not pass the angle adjustment test.

Shelling test:

Example 1 and Comparative Example 1 were tested by a commercially available bombardment tester in which the alloy of the golf iron heads of Example 1 and Comparative Example 1 was subjected to a golf ball impact of 1000 rounds on the left, middle and right sides. Test and observe the change in the base angle and inclination of the golf iron head. According to the test results of many times, the change in the base angle of Example 1 was approximately between +0.1 degrees and +0.2 degrees, and the change in the inclination angle was approximately 0 degrees, so Example 1 was tested by the shot. Further, the same shot test was also performed for Comparative Example 1, and the change in the base angle of Comparative Example 1 was approximately +0.5 degrees, and the change in the inclination angle was approximately -1 to -1.2 degrees, so Comparative Example 1 did not pass the shot test.

It can be seen from the above that the alloy of the golf iron head of the embodiment of the present invention is a high chromium component, and the molybdenum and niobium in a specific composition range are added, thereby substantially not affecting the mechanical properties (for example, tensile strength) of the alloy of the golf iron head. Under the premise of, the strength of the fall and the amount of elongation, it can also pass the angle test and the shelling test.

The present invention has been disclosed in its preferred embodiments, and is not intended to limit the invention, and the present invention may be modified and modified without departing from the spirit and scope of the invention. The scope of protection is subject to the definition of the scope of the patent application.

Claims (8)

An alloy of golf iron head comprising: 21.11 to 21.16 parts by weight of chromium; 5.38 to 5.43 parts by weight of nickel; 0.13 to 0.17 parts by weight of nitrogen; greater than zero and less than or equal to 0.09 parts by weight of carbon; and from 1.54 to 1.66 Parts by weight of molybdenum; 1.57 to 1.64 parts by weight of bismuth; and 67.85 to 70.27 parts by weight of iron, wherein the alloy of the golf iron head has an average grain size of between 80 and 100 microns. The alloy of the golf iron head according to claim 1, further comprising copper greater than zero and less than or equal to 0.05 parts by weight. The alloy of the golf iron head according to claim 1, further comprising 0.6 to 0.98 parts by weight of rhodium and 0.87 to 0.97 parts by weight of manganese. The alloy of the golf iron head according to claim 1, wherein the average grain size of the alloy of the golf iron head is between 88 and 92 microns. A method for producing a composition alloy of a golf iron head, comprising the steps of: providing a plurality of raw materials comprising 21.11 to 21.16 parts by weight of chromium, 5.38 to 5.43 parts by weight of nickel, 0.13 to 0.17 parts by weight of nitrogen, greater than zero and Less than or equal to 0.09 parts by weight of carbon, 1.54 to 1.66 parts by weight of molybdenum, 1.57 to 1.64 parts by weight of bismuth, and 67.85 to 70.27 parts by weight of iron; a smelting step of the raw materials to form a liquid alloy, wherein the melting a melting temperature of the refining step is between 1650 and 1660 ° C; and a casting step is performed on the liquid alloy to form an alloy of the golf iron head, wherein a temperature of the shell mold of the casting step is between 1180 and 1220 Between ° C, wherein the alloy of the golf iron head has an average grain size of between 80 and 100 microns. The method for manufacturing a composition alloy of a golf iron head according to claim 5, wherein after the smelting step, further comprising: performing a tempering step on the alloy of the golf iron head, wherein one of the tempering steps The tempering temperature is between 680 and 700 ° C and a tempering time is between 50 and 70 minutes. The method for producing a composition alloy of a golf iron head according to claim 5, further comprising adding 0.6 to 0.98 parts by weight of cerium and 0.87 to 0.97 parts by weight of manganese to reduce the liquid alloy in the smelting step. a residual gas. The method for producing a composition alloy of a golf iron head according to claim 5, wherein the materials further comprise more than zero and less than or equal to 0.05 parts by weight of copper.