阅读说明：本技术 一种高强度不锈钢扁丝的生产工艺 (Production process of high-strength stainless steel flat wire ) 是由 徐钦华 宗永 朱建新 李明扬 卞利忠 孙琛 李超群 于 2019-12-26 设计创作，主要内容包括：本发明涉及一种高强度不锈钢扁丝的生产工艺,包括以下步骤：S1、母线选取：母线的强度在1300-1500MPa,硬度在HV400-450；S2、粗轧轧制；S3、一级精轧轧制；S4、二级精轧轧制；S5、重复轧制：母线经过收线机组收卷,返回放线机组,重复步骤S1-S4,反复轧制5-8次,得到不锈钢扁丝成品。本发明采用一定强度的不锈钢母线进行逐次分级冷轧,提高了不锈钢扁丝的轧制效果,生产出高强度且硬度HV500-600的新型不锈钢扁丝,满足市场需求。(The invention relates to a production process of a high-strength stainless steel flat wire, which comprises the following steps: s1, selecting a bus: the strength of the bus is 1300-1500MPa, and the hardness is HV 400-450; s2, rough rolling; s3, primary finish rolling; s4, secondary finish rolling; s5, repeated rolling: and (4) winding the bus by a wire take-up unit, returning to the wire pay-off unit, repeating the steps S1-S4, and repeatedly rolling for 5-8 times to obtain a stainless steel flat wire finished product. According to the invention, the stainless steel bus with certain strength is adopted to carry out successive graded cold rolling, so that the rolling effect of the stainless steel flat wire is improved, and the novel stainless steel flat wire with high strength and hardness HV500-600 is produced, thereby meeting the market demand.)

1. A production process of a high-strength stainless steel flat wire is characterized by comprising the following steps: the method comprises the following steps:

s1, selecting a bus: the strength of the bus is 1300-1500MPa, and the hardness is HV 400-450;

s2, rough rolling: the bus bar enters a pair of rough rollers of a rough rolling mill for rough rolling after coming out of the pay-off unit;

s3, primary finish rolling: placing the bus after rough rolling on a first finishing mill, and performing primary finish rolling by a first finishing roller;

s4, secondary finish rolling: placing the bus subjected to the primary finish rolling on a second finishing mill, and performing secondary finish rolling by a second finishing roll;

s5, repeated rolling: and (4) winding the bus by a wire take-up unit, returning to the wire pay-off unit, repeating the steps S1-S4, and repeatedly rolling for 5-8 times to obtain a stainless steel flat wire finished product.

2. The production process of the high-strength stainless steel flat wire according to claim 1, characterized in that: in S3, the first finishing mill includes a pair of first support rolls and a first finishing roll, the first finishing roll is disposed between the first support rolls, and the bus bar is disposed between the upper and lower first finishing rolls.

3. The production process of the high-strength stainless steel flat wire according to claim 2, characterized in that: in S4, the second finishing mill includes a pair of second support rollers and a second finishing roller, the second finishing roller is disposed between the second support rollers, and the bus bar is disposed between the upper and lower second finishing rollers.

4. The production process of the high-strength stainless steel flat wire according to claim 3, characterized in that: the rough rolling roll, the first finishing rolling roll and the second finishing rolling roll are all made of tungsten steel, the hardness is higher than HRA95, and the first supporting roll and the second supporting roll are made of alloy steel.

5. A process according to claim 3 or 4, wherein the high strength stainless steel flat wire is produced by a process comprising the following steps: the diameter of the rough roller is 300mm, the diameter of the first finishing roller is 45mm, and the diameter of the second finishing roller is 35 mm.

6. The production process of the high-strength stainless steel flat wire according to claim 3, characterized in that: the rough roller, the first finishing roller and the second finishing roller are all provided with cooling circulation channels, and the temperature of the rollers is controlled to be 50-60 ℃.

7. The production process of the high-strength stainless steel flat wire according to claim 3, characterized in that: and sequentially reducing gaps between the upper rough roller and the lower rough roller, between the upper first finishing roller and the lower first finishing roller and between the upper second finishing roller and the lower second finishing roller, and gradually carrying out graded cold rolling on the bus until the bus is cold-rolled to the required specification.

Technical Field

The invention relates to the technical field of stainless steel strip production, in particular to a production process of a high-strength stainless steel flat wire.

Background

Compared with the traditional round steel wire, the flat wire has diversity in shape, can be produced in a customized mode according to actual use, can be directly used for production and use by a user, does not need the user to machine again, can save materials and reduce a plurality of troubles of the user, and reduces the cost. With the development and the expansion of the application of the flat wire in recent years, the application of the stainless steel flat wire in the field of springs is more and more extensive.

These are affected by the tensile strength and surface quality of the stainless steel flat wire due to the spring resiliency and fatigue life requirements. In view of the existing stainless steel flat wire for the spring in the field, the mode of promoting the total deformation is mainly used for ensuring the tensile strength of the flat wire, and the produced flat wire for the spring has the problems of large fluctuation of the tensile strength and the fatigue life, so that the existing high-strength stainless steel flat wire can not meet the market demand.

Disclosure of Invention

The invention aims to overcome the defects and provides a production process of a high-strength stainless steel flat wire, wherein a stainless steel bus with certain strength is adopted for carrying out successive graded cold rolling, the rolling effect of the stainless steel flat wire is improved, and a novel stainless steel flat wire with high strength and hardness HV500-600 is produced to meet market demands.

The purpose of the invention is realized as follows:

a production process of a high-strength stainless steel flat wire comprises the following steps:

s1, selecting a bus: the strength of the bus is 1300-1500MPa, and the hardness is HV 400-450;

s2, rough rolling: the bus bar enters a pair of rough rollers of a rough rolling mill for rough rolling after coming out of the pay-off unit;

s3, primary finish rolling: placing the bus after rough rolling on a first finishing mill, and performing primary finish rolling by a first finishing roller;

s4, secondary finish rolling: placing the bus subjected to the primary finish rolling on a second finishing mill, and performing secondary finish rolling by a second finishing roll;

s5, repeated rolling: and (4) winding the bus by a wire take-up unit, returning to the wire pay-off unit, repeating the steps S1-S4, and repeatedly rolling for 5-8 times to obtain a stainless steel flat wire finished product.

Preferably, in S3, the first finishing mill includes a pair of first support rolls and a first finishing roll, the first finishing roll is disposed between the first support rolls, and the generatrix is disposed between the upper and lower first finishing rolls.

Preferably, in S4, the second finishing mill includes a pair of second support rollers and a second finishing roller, the second finishing roller is disposed between the second support rollers, and the generatrix is disposed between the upper and lower second finishing rollers.

Preferably, the rough rolling roll, the first finishing rolling roll and the second finishing rolling roll are all made of tungsten steel, the hardness is more than HRA95, and the first supporting roll and the second supporting roll are made of alloy steel.

Preferably, the diameter of the rough roller is 300mm, the diameter of the first finishing roller is 45mm, and the diameter of the second finishing roller is 35 mm.

Preferably, the rough roller, the first finishing roller and the second finishing roller are all provided with cooling circulation channels, and the temperature of the rollers is controlled to be 50-60 ℃.

Preferably, the gaps between the upper and lower rough rolls, between the upper and lower first finishing rolls and between the upper and lower second finishing rolls are sequentially reduced, and the generatrix is cold-rolled in stages until the required specification is obtained by cold rolling.

The invention has the beneficial effects that:

according to the invention, the stainless steel bus with certain strength is adopted to carry out successive graded cold rolling, so that the rolling effect of the stainless steel flat wire is improved, and the novel stainless steel flat wire with high strength and hardness HV500-600 is produced, thereby meeting the market demand.

Drawings

FIG. 1 is a schematic structural diagram of the present invention.

Fig. 2 is a partially enlarged view of fig. 1.

Wherein: a bus bar 1; a pay-off unit 2; a roughing mill 3; a roughing roll 3.1; a first finishing mill 4; a first support roller 4.1; a first finishing roll 4.2; a second finishing mill 5; a second support roller 5.1; a second finishing roll 5.2; and a winding unit 6.

Detailed Description

Referring to fig. 1 and 2, a high-strength stainless steel flat wire production device, a bus 1 passes through a roughing mill 3, a first finishing mill 4 and a second finishing mill 5 in sequence after coming out of a pay-off unit 2 and is wound in a winding unit 6, the first finishing mill 4 comprises a pair of first supporting rollers 4.1 and first finishing rollers 4.2, the first finishing rollers 4.2 are arranged between the first supporting rollers 4.1, and the bus 1 is arranged between the upper and lower first finishing rollers 4.2.

The second finishing mill 5 comprises a pair of second supporting rolls 5.1 and a second finishing roll 5.2, the second finishing roll 5.2 is arranged between the second supporting rolls 5.1, and the bus 1 is arranged between the upper and lower second finishing rolls 5.2.

The rough rolling roll 3.1, the first finishing rolling roll 4.2 and the second finishing rolling roll 5.2 are all made of tungsten steel, the hardness is more than HRA95, and the first supporting roll 4.1 and the second supporting roll 4.2 are made of alloy steel.

The diameter of the rough roller is 3.1 mm, the diameter of the first finishing roller is 4.2 mm, the diameter of the first finishing roller is 45mm, and the diameter of the second finishing roller is 5.2 mm.

The rough roller 3.1, the first finishing roller 4.2 and the second finishing roller 5.2 are all provided with cooling circulation channels, and the temperature of the rollers is controlled to be 50-60 ℃.

Cooling water is introduced into the cooling circulation channel.

A production process of a high-strength stainless steel flat wire adopts the device, and comprises the following steps:

s1, selecting a bus: the strength of the bus is 1300-1500MPa, and the hardness is HV 400-450;

s2, rough rolling: the bus bar enters a pair of rough rollers of a rough rolling mill for rough rolling after coming out of the pay-off unit;

s3, primary finish rolling: placing the bus after rough rolling on a first finishing mill, and performing primary finish rolling by a first finishing roller;

s4, secondary finish rolling: placing the bus subjected to the primary finish rolling on a second finishing mill, and performing secondary finish rolling by a second finishing roll;

s5, repeated rolling: and (4) winding the bus by a wire take-up unit, returning to the wire pay-off unit, repeating the steps S1-S4, and repeatedly rolling for 5-8 times to obtain a stainless steel flat wire finished product. The strength of the obtained finished product is 1750-2100MPa, and the hardness HV 500-600.

And sequentially reducing gaps between the upper rough roller and the lower rough roller, between the upper first finishing roller and the lower first finishing roller and between the upper second finishing roller and the lower second finishing roller, and gradually carrying out graded cold rolling on the bus until the bus is cold-rolled to the required specification.

Rough rolling → first-stage finish rolling → second-stage finish rolling, and the total reduction of the bus bar is more than 50% after 5-8 passes of rolling.