阅读说明：本技术 一种硬质合金辊环及其制备方法 (Hard alloy roll collar and preparation method thereof ) 是由 潘海涌 何小蓉 俞晓祥 江正彬 于 2020-05-28 设计创作，主要内容包括：本发明公开了一种硬质合金辊环,由以下重量份材料组成：WC粉末85-90份；Fe粉末5-10份；镍粉末8-15份；陶瓷粉末颗粒16-20份；聚四氟乙烯颗粒25-30份；交联剂10-20份；N,N－亚甲基双丙基铣酰胺10-20份；高铈离子1-5份。一种硬质合金辊环的制备方法,具体步骤为：1)将备好的WC粉末、Fe粉末、镍粉末、陶瓷粉末颗粒、聚四氟乙烯颗粒进行配料；2)依次加入交联剂、N,N－亚甲基双丙基铣酰胺、高铈离子；3)将混合物在真空气雾化炉内自由向下流入气体雾化炉,进行紫外线光照,并在超音速气流的冲击作用下,粉碎成微细液滴,冷却、凝固后得到合金粉末；4)成形。本发明具有耐磨性能好、机械强度高、韧性好、使用寿命长的优点。(The invention discloses a hard alloy roll collar which is composed of the following materials in parts by weight: 85-90 parts of WC powder; 5-10 parts of Fe powder; 8-15 parts of nickel powder; 16-20 parts of ceramic powder particles; 25-30 parts of polytetrafluoroethylene particles; 10-20 parts of a cross-linking agent; 10-20 parts of N, N-methylene-bis-propyl millamide; 1-5 parts of high cerium ions. A preparation method of a hard alloy roll collar comprises the following specific steps: 1) mixing the prepared WC powder, Fe powder, nickel powder, ceramic powder particles and polytetrafluoroethylene particles; 2) sequentially adding a cross-linking agent, N-methylene-bis-propyl milling amide and high cerium ions; 3) the mixture freely flows downwards into a gas atomization furnace in a vacuum gas atomization furnace, is irradiated by ultraviolet rays, is crushed into fine liquid drops under the impact action of supersonic airflow, and is cooled and solidified to obtain alloy powder; 4) and (4) forming. The invention has the advantages of good wear resistance, high mechanical strength, good toughness and long service life.)

1. The hard alloy roll collar is characterized by comprising the following materials in parts by weight:

85-90 parts of WC powder;

5-10 parts of Fe powder;

8-15 parts of nickel powder;

16-20 parts of ceramic powder particles;

25-30 parts of polytetrafluoroethylene particles;

10-20 parts of a cross-linking agent;

10-20 parts of N, N-methylene-bis-propyl millamide;

1-5 parts of high cerium ions.

2. The cemented carbide roll collar of claim 1, wherein the cross-linking agent is a mixture of polyethylene glycol (PEG), N-vinyl pyrrolidone (PVP), polymethyl methacrylate, and polybutyl methacrylate at a ratio of 1:1:1: 1.

3. The cemented carbide roll collar of claim 1, wherein the WC powder has a grain size of 10-12 μm.

4. The cemented carbide roll ring according to claim 1, wherein the Fe powder has a grain size of 1-3 μm.

5. The cemented carbide roller ring according to claim 1, wherein the nickel powder has a particle size of 2 to 4 μm.

6. The cemented carbide roll ring according to claim 1, wherein the ceramic powder particles have a particle size of 15-20 μm.

7. The method for preparing the hard alloy roll collar according to claim 1, which is characterized by comprising the following specific steps of:

1) mixing the prepared WC powder, Fe powder, nickel powder, ceramic powder particles and polytetrafluoroethylene particles;

2) sequentially adding a cross-linking agent, N-methylene-bis-propyl milling amide and high cerium ions;

3) the mixture freely flows downwards into a gas atomization furnace in a vacuum gas atomization furnace, is irradiated by ultraviolet rays, is crushed into fine liquid drops under the impact action of supersonic airflow, and is cooled and solidified to obtain alloy powder;

4) under the protection of inert gas, Selective Laser Melting (SLM) forming is carried out.

8. The method for manufacturing a cemented carbide roll collar as claimed in claim 7, wherein the pressure of the inert gas blown in the step 4) is 0.7MPa to 4.0 MPa.

Technical Field

The invention relates to a hard alloy roll collar and a preparation method thereof.

Background

The roll collar belongs to the part between the grooves or outside the grooves on the roller body of the sectional material roller. The roller ring can be divided into an end roller ring and a middle roller ring according to different positions of the roller ring on the roller. At present, the traditional roll collar is generally made of cast iron, so that the defects of poor product quality, short service life, weak hardness and the like are overcome.

Disclosure of Invention

The purpose of the invention is as follows: the invention aims to overcome the defects in the prior art and provides the hard alloy roll collar with the advantages of high hardness, good wear resistance, high mechanical strength, good toughness, long service life and the like and the preparation method thereof.

The technical scheme is as follows: the invention relates to a hard alloy roll collar which is composed of the following materials in parts by weight:

85-90 parts of WC powder;

5-10 parts of Fe powder;

8-15 parts of nickel powder;

16-20 parts of ceramic powder particles;

25-30 parts of polytetrafluoroethylene particles;

10-20 parts of a cross-linking agent;

10-20 parts of N, N-methylene-bis-propyl millamide;

1-5 parts of high cerium ions.

The invention is further improved in that the cross-linking agent is prepared by mixing polyethylene glycol Polymer (PEG), N-vinyl pyrrolidone (PVP), polymethyl methacrylate and polybutyl methacrylate according to the proportion of 1:1:1: 1.

The invention is further improved in that the WC powder has a particle size of 10 to 12 μm.

A further development of the invention consists in that the particle size of the Fe powder is 1 to 3 μm.

A further improvement of the present invention is that the nickel powder has a particle size of 2-4 μm.

The invention is further improved in that the ceramic powder particles have a particle size of 15 to 20 μm

A preparation method of a hard alloy roll collar comprises the following specific steps:

1) mixing the prepared WC powder, Fe powder, nickel powder, ceramic powder particles and polytetrafluoroethylene particles;

2) sequentially adding a cross-linking agent, N-methylene-bis-propyl milling amide and high cerium ions;

3) the mixture freely flows downwards into a gas atomization furnace in a vacuum gas atomization furnace, is irradiated by ultraviolet rays, is crushed into fine liquid drops under the impact action of supersonic airflow, and is cooled and solidified to obtain alloy powder;

4) under the protection of inert gas, Selective Laser Melting (SLM) forming is carried out.

The invention is further improved in that in the step 4), the pressure of the blown inert gas is 0.7MPa-4.0 MPa.

Compared with the prior art, the hard alloy roll collar and the preparation method thereof provided by the invention at least realize the following beneficial effects:

the nickel powder is a metal binder and has the advantages of high temperature resistance and oxidation resistance. By adding ceramic powder particles for modification, the wear resistance and the chemical corrosion resistance are improved, and the alloy can obtain higher impact, strength and hardness and has the properties of molten metal. The roll collar is modified by polytetrafluoroethylene, so that the roll collar has high mechanical strength, good toughness, good radiation resistance and good chemical stability, is not easy to crack, and is not corroded by acid, alkali, strong oxidant and halogen at room temperature. The content of the cross-linking agent is large, the bonding strength is high, and the impact resistance is high; the high cerium ion is used as a photoinitiator, promotes the fusion of the cross-linking agent, the polytetrafluoroethylene particles and the metal, and prolongs the service life. The hard alloy roll collar is synthesized by the SLM photoetching technology, WC powder, Fe powder, nickel powder, ceramic powder particles and polytetrafluoroethylene particles can be completely melted into a liquid phase, the compactness of the hard alloy roll collar is improved, meanwhile, the precision of the hard alloy roll collar is improved, and the material cost is saved.

Of course, it is not specifically necessary for any one product in which the present invention is practiced to achieve all of the above technical effects simultaneously.

Other features of the present invention and its advantages will become apparent from the following detailed description of exemplary embodiments of the invention.

Detailed Description

The following description of at least one exemplary embodiment is merely illustrative in nature and is in no way intended to limit the invention, its application, or uses.

Techniques, methods, and apparatus known to those of ordinary skill in the relevant art may not be discussed in detail, but are intended to be part of the specification where appropriate.

In all examples shown and discussed herein, any particular value should be construed as merely illustrative, and not limiting. Thus, other examples of the exemplary embodiments may have different values.