阅读说明：本技术 一种用于轧制电池极片的支承辊制造方法 (Manufacturing method of supporting roll for rolling battery pole piece ) 是由 韩维国 辛胜朋 党坤会 梁建立 史会强 于 2021-06-30 设计创作，主要内容包括：本发明涉及轧辊制造技术领域,具体涉及一种用于轧制电池极片的支承辊制造方法；添加炼制钢材中的化学组分及重量百分比,采用LF/VD精炼炉进行精炼,去除杂质,去除钢水中的气体,浇注成钢锭；钢锭锻造并经去应力退火处理,再进行粗加工制得辊坯；粗加工后的辊坯进行调质处理,经调质处理后的辊坯进行回火,回火完成后按所需尺寸进行精加工,制成电池极片支承辊；本发明提高了钢锭凝固质量,提高了轧辊探伤合格率,提高了轧辊抗事故性。(The invention relates to the technical field of roller manufacturing, in particular to a method for manufacturing a supporting roller for rolling a battery pole piece; adding chemical components and weight percentage in the refined steel, refining by adopting an LF/VD refining furnace, removing impurities, removing gas in molten steel, and pouring into steel ingots; forging a steel ingot, performing stress relief annealing treatment, and performing rough machining to obtain a roller blank; carrying out thermal refining on the rough-machined roller blank, tempering the roller blank after thermal refining, and carrying out finish machining according to the required size after tempering is finished to manufacture a battery pole piece supporting roller; the invention improves the solidification quality of steel ingots, the flaw detection qualification rate of the roller and the accident resistance of the roller.)

1. A method for manufacturing a supporting roll for rolling a battery pole piece is characterized by comprising the following steps:

step 1, steel refining: adding chemical components and weight percentage in the steel to reach the required steel making range, refining by adopting an LF/VD refining furnace, removing impurities by using a reduction method, removing gas in molten steel by VD vacuumizing, and pouring into steel ingots;

step 2, forging and heat treatment after forging: forging the steel ingot in the step 1, performing stress relief annealing treatment at the stress relief annealing temperature of 600-800 ℃, and performing rough machining to obtain a roller blank;

and 3, final heat treatment: quenching and tempering the roller blank after rough machining in the step 2, wherein the quenching and tempering heat preservation temperature is 850-950 ℃, and the heat preservation time is 20-30 h; tempering the roll blank after the quenching and tempering treatment, wherein the tempering temperature is 350-500 ℃, the heat preservation time is 30-40h, and finish machining is carried out according to the required size after the tempering is finished to manufacture the battery pole piece supporting roll.

2. A method for manufacturing a back-up roll for rolling a battery pole piece according to claim 1, characterized in that: the steel comprises the following chemical components in percentage by weight: 0.55-0.70% of C; 0.35 to 0.50 percent of Si; 0.25-0.35% of Mn; 1.7-2.1% of Cr; 0.20-0.50% of Mo; ni is less than or equal to 0.30 percent; s is less than or equal to 0.025 percent; p is less than or equal to 0.025 percent; the balance of Fe and a small amount of impurities.

Technical Field

The invention relates to the technical field of roller manufacturing, in particular to a method for manufacturing a supporting roller for rolling a battery pole piece.

Background

Along with the development of the battery industry, the battery pole piece is used as an important component of the battery, the demand is continuously increased, the accident resistance of a user to a roller is more and more important, the C content in the material is in a higher range because the battery pole piece supporting roller is required to have higher hardness, and the hardness of the supporting roller required by the user is more than 70HSD, so that the problems of poor solidification quality of steel ingots, poor toughness and plasticity of products and the like caused by the high C content are solved.

Disclosure of Invention

Aiming at the problems, the invention aims to improve the solidification quality and the toughness and the plasticity of a steel ingot, and simultaneously meet the use requirements of users, the accident resistance and the like.

In order to achieve the purpose, the invention provides the following technical scheme:

a manufacturing method of a supporting roll for rolling a battery pole piece comprises the following steps:

step 1, steel refining: adding chemical components and weight percentage in the steel to reach the required steel making range, refining by adopting an LF/VD refining furnace, removing impurities by using a reduction method, vacuumizing by VD to remove gas in molten steel, and pouring into steel ingots;

step 2, forging and heat treatment after forging: forging the steel ingot in the step 1, performing stress relief annealing treatment at the stress relief annealing temperature of 600-800 ℃, and performing rough machining to obtain a roller blank;

and 3, final heat treatment: quenching and tempering the roller blank after rough machining in the step 2, wherein the quenching and tempering heat preservation temperature is 850-950 ℃, and the heat preservation time is 20-30 h; tempering the roll blank after the quenching and tempering treatment, wherein the tempering temperature is 350-500 ℃, the heat preservation time is 30-40h, and finish machining is carried out according to the required size after the tempering is finished to manufacture the battery pole piece roll.

The technical scheme of the invention is further improved as follows: the steel comprises the following chemical components in percentage by weight: 0.55-0.70% of C; 0.35 to 0.50 percent of Si; 0.25-0.35% of Mn; 1.7-2.1% of Cr; 0.20-0.50% of Mo; ni is less than or equal to 0.30 percent; s is less than or equal to 0.025 percent; p is less than or equal to 0.025 percent; the balance of Fe and a small amount of impurities.

Compared with the prior art, the manufacturing method of the support roll for rolling the battery pole piece has the following beneficial effects:

1. the invention provides a method for manufacturing a supporting roller for rolling a battery pole piece, which reduces the content of C element in the original material and improves the content of Si in the original material; particularly, the C content is reduced, so that the solidification quality of the steel billet is greatly improved, the Si content is improved, the strength of a steel ingot matrix is ensured, the solidification quality of the steel billet is improved, the defects of segregation, looseness and the like of a product can be improved, the flaw detection quality of a core part of the product is improved, and finally the roller has better quality and higher accident resistance.

2. The invention provides a method for manufacturing a supporting roller for rolling a battery pole piece, which adjusts the components of the original production material, improves the solidification quality of steel ingots, improves the flaw detection qualification rate of a roller and improves the accident resistance of the roller on the premise of meeting the use requirements of users.

Detailed Description

The technical solution of the present invention will be clearly and completely described by the following detailed description. It is to be understood that the described embodiments are merely exemplary of the invention, and not restrictive of the full scope of the invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

The rolling method of the supporting roller of the battery pole piece reduces the content of C element in the original material, improves the solidification quality of steel ingots, improves the content of Si in the original material, and ensures the strength of a material matrix; the steel comprises the following chemical components in percentage by weight: 0.55-0.70% of C; 0.35 to 0.50 percent of Si; 0.25-0.35% of Mn; 1.7-2.1% of Cr; 0.20-0.50% of Mo; ni is less than or equal to 0.30 percent; s is less than or equal to 0.025 percent; p is less than or equal to 0.025 percent; the balance of Fe and a small amount of impurities; the solidification quality of steel ingots is improved, the flaw detection qualification rate of the roller is improved, the accident resistance of the roller is improved, and the requirements of users are met; the solidification quality of the steel billet is further improved, the defects of segregation, looseness and the like of the product can be improved, the flaw detection quality of the core of the product is improved, and finally the roller has better quality and higher accident resistance.

Further, the manufacturing method of the supporting roll for rolling the battery pole piece comprises the following steps:

step 1, steel refining: adding chemical components and weight percentage in the steel to reach the required steel making range, refining by adopting an LF/VD refining furnace, removing impurities by using a reduction method, removing gas in molten steel by VD vacuumizing, and pouring into steel ingots;

step 2, forging and heat treatment after forging: forging the steel ingot in the step 1, performing stress relief annealing treatment at the stress relief annealing temperature of 600-800 ℃, and performing rough machining to obtain a roller blank;

and 3, final heat treatment: quenching and tempering the roller blank after rough machining in the step 2, wherein the quenching and tempering heat preservation temperature is 850-950 ℃, and the heat preservation time is 20-30 h; tempering the roll blank after the quenching and tempering treatment, wherein the tempering temperature is 350-500 ℃, the heat preservation time is 30-40h, and finish machining is carried out according to the required size after the tempering is finished to manufacture the battery pole piece supporting roll.

The invention selects the chemical components and the content of steel to be cast into steel billets, and the following table is the chemical components in the steel; (in wt% per unit, the remainder being Fe and a small amount of impurities)

C	Si	Mn	Cr	Mo	Ni	P	S
								0.61	0.45	0.31	1.82	1.35	0.11	0.022	0.003

Adding the chemical components and the weight percentage of the steel in the table above for refining, refining by adopting an LF/VD refining furnace, removing impurities by using a reduction method, vacuumizing by VD to remove gas in molten steel, and pouring into steel ingots;

the stress-relief annealing temperature of the steel billet is 600-800 ℃, and then rough machining is carried out to obtain a roller billet;

quenching and tempering the rough-machined roller blank, wherein the quenching and heat preservation of the quenching and tempering is 850-950 ℃, and the heat preservation time is 20-30 h; tempering the roll blank after the quenching and tempering treatment, wherein the tempering temperature is 350-500 ℃, the heat preservation time is 30-40h, and finish machining is carried out according to the required size after the tempering is finished to manufacture the battery pole piece supporting roll.

The chemical components and the contents of the steel materials in the table are used for processing the battery pole piece supporting roll, and the Shore hardness tester of the special roll is used for detecting that the surface hardness of the roll body of the battery pole piece supporting roll is 72-74 HSD.

The above-mentioned embodiments are merely illustrative of the preferred embodiments of the present invention, and do not limit the scope of the present invention, and various modifications and improvements of the technical solution of the present invention by those skilled in the art without departing from the spirit of the present invention should fall within the protection scope defined by the appended claims.