WO2017070805A1

WO2017070805A1 - Alloy bar of new alloy material for locomotive parts and preparation method therefor

Info

Publication number: WO2017070805A1
Application number: PCT/CN2015/000862
Authority: WO
Inventors: 孙飞; 赵勇; 埃里克斯⋅高登
Original assignee: 苏州列治埃盟新材料技术转移有限公司
Priority date: 2015-10-30
Filing date: 2015-12-04
Publication date: 2017-05-04
Also published as: CN105369055A

Abstract

A copper alloy bar composed of, by weight percentage, 4-6% of zinc, 4-6% of tin and 0.2-1.0% of silicon, with the balance being copper. The copper alloy bar does not contain lead elements.

Description

Alloy new material alloy rod for locomotive parts and preparation method thereof

Technical field

The invention relates to the field of alloy bars, in particular to an alloy new material alloy rod for a locomotive component and a preparation method thereof.

Background technique

Tin bronze is made of tin as the main alloying element. The tin content is generally 3 to 14% by mass. It has high mechanical properties, wear resistance and corrosion resistance, easy cutting, good brazing and welding properties, shrinkage. The coefficient is small, non-magnetic and so on, and is widely used in the manufacture of elastic components and wear parts.

Existing tin bronze materials for locomotive parts often add Pb elements in order to improve chip performance. It is well known that elemental lead is a toxic substance to the human body and the environment. As people's environmental awareness increases, domestic and foreign markets increasingly demand. Development of new copper alloys that do not contain lead.

Summary of the invention

In order to solve the above technical problems, an object of the present invention is to provide an alloy new material alloy rod for a locomotive component and a preparation method thereof, which not only retains the mechanical properties such as chips of the existing tin bronze, but also increases the cost. At the same time, the lead that is harmful to the environment is removed, and finally the environmental performance requirements of the new alloy are met.

In order to achieve the above object, the technical solution adopted by the present invention is as follows:

An alloy new material alloy rod for locomotive parts consists of the following weight percentage components: zinc 4-6%, tin 4-6%, silicon 0.2-1.0%, balance copper.

Preferably, the alloy new material alloy rod for the locomotive component of the present invention consists of the following weight percent components: zinc 4.5%, tin 5%, silicon 0.5%, balance copper.

Preferably, the alloy new material alloy rod for the locomotive component of the present invention consists of the following weight percent components: zinc 5%, tin 5.5%, silicon 0.7%, balance copper.

Preferably, the alloy new material alloy rod for the locomotive component of the present invention consists of the following weight percent components: zinc 5.5%, tin 4.5%, silicon 0.9%, balance copper.

Further, the copper is electrolytic copper.

The invention provides a preparation method of an alloy new material alloy rod for a locomotive component, comprising the following steps:

1) According to the weight of the compound, the electrolytic copper, tin, zinc and silicon are placed in an electric furnace, heated to 1250-1300 ° C to be completely melted, and then kept at 1200 ° C;

2) Transfer the alloyed liquid obtained in the step 1) to the holding furnace, thoroughly stir the completely molten alloy liquid with a stirring tool, and cover the high-purity flaky graphite powder thereon to prevent oxidation thereof. The temperature is kept at 1100-1150 ° C, and the holding time is 1.2-1.5 h;

3) After the end of the heat preservation, the sample taken out from the furnace is subjected to component inspection by a spectrometer, and the sampling times are 3-6 times to determine that the alloy composition is within the acceptable range;

4) After further heat preservation for 40-60 minutes, reheat the temperature to 1300 degrees Celsius, and turn on the vibration device of the power frequency electric furnace. The vibration frequency is 1 time/second, and the solid alloy bar with the specified diameter and length is cast by the horizontal continuous casting method. ;

5) annealing before extrusion, annealing the alloy rod with a box annealing furnace: annealing temperature is 200-300 ° C, annealing time is 20-30 minutes, in order to facilitate extrusion;

6) Surface processing of the annealed rough alloy rod by an optical spindle machine, processing into a smooth surface alloy rod, extruded by a 2000-ton double-action extruder, the heating temperature of the alloy rod is 100-150 ° C, and the extrusion temperature is 300 degrees Celsius, extrusion speed V = 2mm / s, after multiple extrusions to obtain semi-finished specifications of the outer diameter and length of the alloy rod;

7) The extruded alloy rod is subjected to cracking and stomatal flaw detection by an ultrasonic flaw detector to pick out the unqualified product and return it to the furnace;

8) Surface turning of the alloy rod after the flaw detection is completed with a high-precision lathe, and an alloy rod of outer diameter and length of the finished specification is obtained, and the ends of the alloy rod are deburred and packaged into the warehouse.

Further, the electric furnace in the step 1) is a power frequency electric furnace and is under the protection of an argon atmosphere.

Further, the stirring tool is performed in step 2) as a special graphite tool.

Further, the spectrometer in step 3) adopts a Spike direct reading spectrometer imported from Germany.

Further, the high-purity flaky graphite powder in the step 2) has a thickness of 11 to 13 cm.

The invention has the beneficial effects that the present invention provides an alloy new material alloy rod for a locomotive component and a preparation method thereof, which replaces the traditional lead element with silicon element and distributes according to a certain distribution of silicon, tin, zinc and copper. By combining the appropriate temperature, by continuously casting the blank ingot and extruding it with an extruder to produce a tin bronze alloy bar which can completely replace the lead element, not only the existing tin bronze is retained without increasing the cost. The mechanical properties of the chip, while removing the lead that is harmful to the environment, and finally meet the environmental performance requirements of the new alloy.

DRAWINGS

BRIEF DESCRIPTION OF THE DRAWINGS Figure 1 is a flow chart of a method of an alloy new material alloy rod for a locomotive component of the present invention.

detailed description

The present invention will be further described in detail below with reference to the accompanying drawings and embodiments. It is understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.

Example 1

An alloy new material alloy rod for locomotive parts consists of the following weight percentage components: zinc 4.5%, tin 5%, silicon 0.5%, balance copper, wherein copper is electrolytic copper.

In the present embodiment, the alloy new material alloy rod for the locomotive parts described above is produced by the following steps (as shown in Fig. 1):

1) According to the weight of the compound, the electrolytic copper, tin, zinc and silicon are placed in a power frequency electric furnace protected by an argon atmosphere, heated to 1250-1300 ° C to be completely melted, and then kept at 1200 ° C;

2) Transfer the alloyed liquid obtained in the step 1) to the holding furnace, thoroughly stir the completely molten alloy liquid with a special graphite tool, and cover the high-purity flaky graphite powder thereon. It is prevented from oxidizing and has a thickness of 11-13 cm. The set temperature of the holding furnace is kept at 1100-1150 ° C, and the holding time is 1.2-1.5 h;

3) After the end of the heat preservation, the samples taken from the furnace were inspected by the German imported Spike direct reading spectrometer, and the sampling times were 3-6 times to determine that the alloy composition was within the acceptable range;

4) After further heat preservation for 40-60 minutes, reheat the temperature to 1300 degrees Celsius, and turn on the vibration device of the power frequency electric furnace. The vibration frequency is 1 time/second. The outer diameter is 210mm and the length is 500mm. Solid alloy bar;

6) Surface-processing the annealed rough alloy rod with an optical spindle machine, and processing it into an alloy rod with a surface smooth diameter of 205 mm and a length of 500 mm, which is extruded by a 2000-ton double-action extruder, and the heating temperature of the alloy rod is 100-150 ° C. The extrusion temperature is 300 degrees Celsius, the extrusion speed is V=2mm/s, and after multiple extrusions, a semi-finished alloy rod having a diameter of 190 mm, a tolerance of ±1 mm, a length of 580 mm and a length of semi-finished product is obtained;

8) Surface turning of the alloy rod after flaw detection with a high-precision lathe, to obtain a finished alloy rod with a diameter of 185 mm, a tolerance of ±0.1 mm, a length of 580 mm, and a length, and deburring the both ends of the alloy rod wrap up and store.

Compared with the existing lead-containing tin bronze alloy, the alloy new material alloy rod for the locomotive parts provided by the embodiment not only retains the mechanical properties such as the chip of the existing tin bronze, but also satisfies the requirements for environmental performance. .

Example 2

In this embodiment, the alloy new material alloy rod for the locomotive component is composed of the following weight percent components: zinc 5%, tin 5.5%, silicon 0.7%, balance copper, wherein copper is electrolytic copper.

The above alloy new material alloy rod for the locomotive component is obtained by the same method as in the first embodiment, and the above-mentioned environmentally friendly lead-free alloy new material can be used by the same method as in the first embodiment. Gold bars are used for locomotive parts.

Example 3

In this embodiment, the alloy new material alloy rod for the locomotive component is composed of the following weight percent components: zinc 5.5%, tin 4.5%, silicon 0.9%, balance copper, wherein copper is electrolytic copper.

The above alloy new material alloy rod for the locomotive part was obtained by the same method as in Example 1, and the above-mentioned environmentally friendly lead-free alloy new material alloy rod was still used for the locomotive part by the same method as Example 1.

Example 4

In this embodiment, the alloy new material alloy rod for the locomotive component is composed of the following weight percent components: zinc 4%, tin 4%, silicon 0.2%, balance copper, wherein copper is electrolytic copper.

Example 5

In the present embodiment, the alloy new material alloy rod for the locomotive component is composed of the following weight percentage components: zinc 6%, tin 6%, silicon 1.0%, balance copper, and copper is electrolytic copper.

The performance test of the alloy new material alloy rod for the locomotive parts obtained in the above Examples 1-5 of the present invention was carried out, and the mechanical performance parameters thereof are shown in Table 1.

Table 1

It can be seen from the data of Table 1 above that the alloy new material alloy rod for locomotive parts provided by the present invention replaces the traditional lead element with silicon element, and not only retains the existing tin bronze without increasing the cost. The mechanical properties such as chip performance, yield strength, wear resistance, and the removal of environmentally harmful lead, and ultimately meet the environmental performance requirements of the new alloy.

The instrumental and operational steps and parameters described above are to be understood as being illustrative and not limiting, and modifications may be made within the scope of the above description and claims. That is, the scope of the invention should be determined with reference to the full scope of the appended claims, rather than the above description. In sum, it should be understood that the invention is capable of various modifications and changes.

Claims

An alloy new material alloy rod for a locomotive component, characterized in that it consists of the following weight percentage components: zinc 4-6%, tin 4-6%, silicon 0.2-1.0%, and the balance copper.
The alloy new material alloy rod for a locomotive component according to claim 1, which is composed of the following components by weight: 4.5% zinc, 5% tin, 0.5% silicon, and the balance being copper.
The alloy new material alloy rod for a locomotive component according to claim 1, which is composed of the following components by weight: zinc 5%, tin 5.5%, silicon 0.7%, and the balance being copper.
The alloy new material alloy rod for a locomotive component according to claim 1, which is composed of the following components by weight: 5.5% zinc, 4.5% tin, 0.9% silicon, and the balance being copper.
An alloy new material alloy rod for a locomotive component according to any one of claims 1 to 4, wherein the copper is electrolytic copper.
A method for preparing an alloy new material alloy rod for a locomotive component according to any one of claims 1 to 4, characterized in that it comprises the following steps:

1) The electrolytic weight of copper, tin, zinc, silicon in an electric furnace according to any one of claims 1-4, heated to 1250-1300 ° C to be completely melted, and then kept to 1200 ° C;

2) Transfer the alloyed liquid obtained in the step 1) to the holding furnace, thoroughly stir the completely molten alloy liquid with a stirring tool, and cover the high-purity flaky graphite powder thereon to prevent oxidation thereof. The temperature is kept at 1100-1150 ° C, and the holding time is 1.2-1.5 h;

3) After the end of the heat preservation, the sample taken out from the furnace is subjected to component inspection by a spectrometer, and the sampling times are 3-6 times to determine that the alloy composition is within the acceptable range;

4) After further heat preservation for 40-60 minutes, reheat the temperature to 1300 degrees Celsius, and turn on the vibration device of the power frequency electric furnace. The vibration frequency is 1 time/second, and the solid alloy bar with the specified diameter and length is cast by the horizontal continuous casting method. ;

5) annealing before extrusion, annealing the alloy rod with a box annealing furnace: annealing temperature is 200-300 ° C, annealing time is 20-30 minutes, in order to facilitate extrusion;

6) Surface processing of the annealed rough alloy rod by an optical spindle machine, processing into a smooth surface alloy rod, extruded by a 2000-ton double-action extruder, the heating temperature of the alloy rod is 100-150 ° C, and the extrusion temperature is 300 degrees Celsius, extrusion speed V = 2mm / s, after multiple extrusions to obtain semi-finished specifications of the outer diameter and length of the alloy rod;

7) The extruded alloy rod is subjected to cracking and stomatal flaw detection by an ultrasonic flaw detector to pick out the unqualified product and return it to the furnace;

8) Surface turning of the alloy rod after the flaw detection is completed with a high-precision lathe, and an alloy rod of outer diameter and length of the finished specification is obtained, and the ends of the alloy rod are deburred and packaged into the warehouse.
The method for preparing an alloy new material alloy rod for a locomotive component according to claim 6, wherein the electric furnace in the step 1) is a power frequency electric furnace and is under the protection of an argon atmosphere.
The method for preparing an alloy new material alloy rod for a locomotive component according to claim 6, wherein the stirring tool in the step 2) is a special graphite tool.
The method for preparing an alloy new material alloy rod for a locomotive component according to claim 6, wherein the spectrometer in step 3) adopts a German imported Spike direct reading spectrometer.
The method for preparing an alloy new material alloy rod for a locomotive component according to claim 8, wherein the high-purity flaky graphite powder in the step 2) has a thickness of 11 to 13 cm.