TWI546137B - Metal substrate processing method - Google Patents

Description

Metal substrate processing method

The present invention relates to a metal substrate processing method, and more particularly to a metal substrate processing method which can reduce manufacturing costs.

Conventional metal products (for example, tools and molds) are usually surface-strengthened after processing in order to facilitate processing. For example, in order to improve the wear resistance, the cutting tool usually coats one or two hard layers with heat treatment or coating after the tool is formed. The current tool is manufactured by forging, then annealing and quenching. Heat treatment such as tempering, however, its hardening performance is poor, softening and low resistance to tempering, so low temperature hardness and low cutting durability, or another type of process is formed by first forming a layer or two layers of hardened film. To increase wear resistance, but the process is cumbersome and costly.

The main object of the present invention is to provide a metal substrate processing method for processing and modifying a metal substrate by a solid, liquid to gaseous phase change process of a working fluid, which has the advantages of cost saving and environmental protection.

A metal substrate processing method according to the present invention comprises at least the steps of: providing a metal substrate having a surface; performing a heating step to heat the metal substrate; and performing a beading and quenching In the step, the surface of the metal substrate is simultaneously subjected to bead blasting and quenching. Since the present invention directly performs the beading and quenching processing of the metal substrate by the working fluid from a solid state, a liquid state to a gaseous phase transition process, the metal substrate can be continuously and rapidly modified, and the upgrading process is performed. It does not produce waste and heavy metals, and does not require expensive machine equipment, which has the effect of reducing production costs and environmental protection.

1 and 2A to 2C, a metal substrate processing method according to an embodiment of the present invention, comprising at least the following steps: First, please refer to step 11 and FIG. 2A of FIG. 1 to provide a metal base. The metal substrate 100 has a surface 110. The material of the metal substrate 100 may be selected from iron-based metal materials such as SS400, S50C, SKD11 and the like.

Next, referring to step 12 and FIG. 2B of FIG. 1 , a heating step is performed to heat the metal substrate 100 to an operating temperature. The material of the metal substrate 100 is SS400. The operating temperature is Celsius. 900 to 1200 degrees, since the metal substrate 100 can be of various materials, the operating temperature varies depending on the material of the metal substrate 100 in the heating step.

Thereafter, referring to step 13 and FIG. 2C of FIG. 1 , a beading and quenching step is performed, which is sprayed through at least one nozzle 200 to emit a working fluid 300, which may be selected from water, oil or The oil-water mixed liquid or the like, in the present embodiment, the working fluid 300 is stored in a storage device 400 connected to the nozzle 200, the working fluid 300 has a first temperature, and the working fluid 300 is pushed out by a jet pressure The nozzle 200, in the present embodiment, has a jet pressure between 100 and 300 bar and the first temperature is between -10 and -4 degrees Celsius.

Referring to FIG. 2C, the beading and quenching step 13 is performed in a processing environment (not shown). The processing environment has a second temperature and an ambient pressure, and the second temperature is not lower than the first a temperature, and the ambient pressure is lower than the jet pressure of the working fluid 300 to the discharge device 400. In the embodiment, the ambient pressure is a normal pressure, and the second temperature is between 10 and 60 degrees Celsius. Therefore, when the working fluid 300 is pushed out of the nozzle 200 by the jet pressure, the working fluid 300 is transformed into a solid bead working fluid 310 (such as ice beads) due to a change in pressure difference and temperature difference, the solid bead. The working fluid 310 is shaped to strike the surface 110 of the metal substrate 100.

Referring to FIG. 2C, after the solid bead working fluid 310 strikes the surface 110 of the metal substrate 100, the solid bead working fluid 310 contacts the heated metal substrate 100, and the solid state The beaded working fluid 310 is transformed into a liquid working fluid by heat, and then the liquid working fluid is instantaneously transformed into a gaseous working fluid, and the solid bead working fluid 310 is transformed into a liquid state. The working fluid and the gaseous working fluid process are to quench the metal substrate 100.

In the present embodiment, the metal substrate 100 is transported by the transport device A. Therefore, some or all of the metal substrate 100 can be modified by controlling the transport device A. Since the present invention directly utilizes the working fluid 300 having phase change characteristics to directly modify the metal substrate 100 during the phase change process, the metal substrate 100 can be directly subjected to the bead shot directly in the same step. Quenching and processing, so no pollutants or waste, it has the advantages of simple process, low cost and environmental protection.

Referring to FIG. 2C, the angle at which the nozzle 200 ejects the solid bead working fluid 310 can be adjusted according to the material properties of the metal substrate 100 to meet the modification requirements of different material properties. In this embodiment, The nozzle 200 is coupled to an adjusting device B to adjust the ejecting angle of the nozzle 200 to control the depth and strength of the surface 110 of the metal substrate 100. The ejecting angle of the nozzle 200 is between 0 and the angle of the plumb line. Between 60 degrees, in the present embodiment, the nozzle 200 has an ejecting angle of 15 degrees.

Finally, please refer to Tables 1 to 2, which are the experimental results of the modification of the metal substrate 100 of different materials in the present invention. Please refer to Table 1, which is selected from the section of the metal substrate 100. The experimental results of the modified steel of size 10*50mm are shown in Table 1. It can be seen that the tensile strength and the drop strength of the flat steel with a section size of 10*50mm are obviously improved.

Please refer to Table 2, which is the result of the modification of the metal substrate 100 selected from C-shaped steel and square pipe with a cross-sectional dimension of 20*50 mm. It can be seen from Table 2 that the C-shaped steel has a cross-sectional dimension of 20*50 mm. After the square pipe is upgraded, the tensile strength and the drop strength are obviously improved.

The scope of the present invention is defined by the scope of the appended claims, and any changes and modifications made by those skilled in the art without departing from the spirit and scope of the invention are within the scope of the present invention. .

11‧‧‧ Providing a metal substrate
12‧‧‧A heating step
13‧‧‧A bead and quenching step
100‧‧‧Metal substrate
110‧‧‧ surface
200‧‧‧ nozzle
300‧‧‧Working fluid
310‧‧‧Solid bead working fluid
400‧‧‧Storage device
A‧‧‧ conveying device
B‧‧‧Adjustment device

Figure 1 is a flow chart showing a method of processing a metal substrate in accordance with an embodiment of the present invention. 2A to 2C are schematic cross-sectional views showing a method of processing a metal substrate according to an embodiment of the present invention.

11‧‧‧ Providing a metal substrate

12‧‧‧A heating step

13‧‧‧A bead and quenching step

Claims (9)

A metal substrate processing method comprising: providing a metal substrate having a surface; performing a heating step to heat the metal substrate; and performing a beading and quenching step while simultaneously the metal substrate The surface is subjected to beading and quenching, wherein a working fluid is ejected through at least one nozzle, and the working fluid is ejected from the nozzle as a solid bead working fluid, and the solid bead working fluid is beaded. Strikeing the surface of the metal substrate, when the solid bead working fluid contacts the surface of the metal substrate, the solid bead working fluid phase changes into a liquid working fluid, and the liquid working fluid The phase changes into a gaseous working fluid, and the metal substrate is quenched by the solid bead working fluid phase changing into a liquid working fluid and a gaseous working fluid process. The metal substrate processing method according to claim 1, wherein the working fluid has a first temperature, the working fluid is pushed out of the nozzle by a jet pressure, and the beading and quenching step is in a processing environment. The processing environment has a second temperature and an ambient pressure, the second temperature is not less than the first temperature, and the ambient pressure is less than the jet pressure, so that the working fluid is formed into the solid bead working fluid. . The metal substrate processing method of claim 2, wherein the jet pressure is between 100 and 300 bar. The metal substrate processing method according to claim 2, wherein the first temperature is between -10 and -4 degrees Celsius. The metal substrate processing method according to claim 1, wherein the working fluid is selected from the group consisting of water, oil or oil-water mixed liquid. The metal substrate processing method according to claim 2, wherein the ambient pressure is normal pressure. The metal substrate processing method of claim 2, wherein the second temperature is between 10 and 60 degrees Celsius. The metal substrate processing method according to claim 1, wherein the nozzle is coupled to an adjusting device to adjust an ejecting angle of the nozzle. The metal substrate processing method according to claim 8, wherein the nozzle has an ejecting angle of between 0 and 60 degrees from the plumb bobbin.