阅读说明：本技术 一种双相不锈钢f53锻造成型防裂纹的制作方法 (Manufacturing method for forging and forming crack prevention of duplex stainless steel F53 ) 是由 葛协东 葛征坪 李洪 于 2020-05-06 设计创作，主要内容包括：本发明公开了一种双相不锈钢F53锻造成型防裂纹的制作方法,其步骤为：①将钢锭放入加热炉内,装炉避开火焰直喷,随炉加热小于60℃/h,至300℃～350℃时保温4小时；②再将温度为300℃～350℃的钢锭以100℃/h的速度升温至1020℃～1050℃,保温20小时；③将温度为1020℃～1050℃的钢锭以70℃/h～100℃/h的速度升温至1200℃,保温20小时；④将步骤③中得到的钢锭取出放到锻造机锻造；⑤在锻压过程中出现外表面有裂纹,在热态中用气割马上清除；⑥将锻至尺寸的毛坯锻件放入加热炉内继续加热至1070℃,保温3小时后固溶,固溶的水温大于40℃。本发明提高了锻造效率及质量,防止产品表面裂纹,减少了能耗,降低了成本。(The invention discloses a manufacturing method of a duplex stainless steel F53 forging forming crack prevention, which comprises the following steps: firstly, putting the steel ingot into a heating furnace, charging the steel ingot and avoiding flame direct injection, heating the steel ingot along with the furnace to less than 60 ℃/h, and preserving the heat for 4 hours when the temperature is between 300 and 350 ℃; secondly, heating the steel ingot with the temperature of 300-350 ℃ to 1020-1050 ℃ at the speed of 100 ℃/h, and preserving the heat for 20 hours; thirdly, raising the temperature of the steel ingot with the temperature of 1020-1050 ℃ to 1200 ℃ at the speed of 70-100 ℃/h, and preserving the temperature for 20 hours; fourthly, the steel ingot obtained in the third step is taken out and put into a forging machine for forging; fifthly, cracks appear on the outer surface in the forging process, and are immediately removed by gas cutting in a hot state; sixthly, placing the blank forged piece with the size into a heating furnace, continuously heating to 1070 ℃, preserving the temperature for 3 hours, and then carrying out solid solution, wherein the water temperature for solid solution is more than 40 ℃. The invention improves the forging efficiency and quality, prevents the surface cracks of the product, reduces the energy consumption and reduces the cost.)

1. A manufacturing method for forging and forming crack prevention of duplex stainless steel F53 comprises the following steps:

firstly, putting the steel ingot into a heating furnace, charging the steel ingot and avoiding flame direct injection, heating the steel ingot along with the furnace to less than 60 ℃/h, and preserving the heat for 4 hours when the temperature is between 300 and 350 ℃;

secondly, after preserving heat for 4 hours, heating the steel ingot with the temperature of 300-350 ℃ to 1020-1050 ℃ at the speed of 100 ℃/h, and preserving heat for 20 hours;

thirdly, raising the temperature of the steel ingot with the temperature of 1020-1050 ℃ to 1200 ℃ at the speed of 70-100 ℃/h, and preserving the temperature for 20 hours;

fourthly, the steel ingot obtained in the third step is taken out and placed on a forging machine, the steel ingot is lightly patted, rounded and chamfered by utilizing a forging head with an arc-shaped bottom, the steel ingot is straightened and upset, the single pressing amount of the forging head of the forging machine is less than 30mm, the time is kept for 2 seconds, the forging direction is controlled to be 1:1.5 gradually deformed, the steel ingot is rounded 1 time after pressing the product for 100 mm-150 mm each time, and the angular crack and the tensile crack are reduced;

fifthly, cracks appear on the outer surface in the forging process, and are immediately removed by gas cutting in a hot state;

sixthly, placing the blank forged piece with the size into a heating furnace, continuously heating to 1070 ℃, preserving the temperature for 3 hours, and then carrying out solid solution, wherein the water temperature for solid solution is more than 40 ℃.

2. The method for manufacturing the duplex stainless steel F53 forging-forming crack prevention according to claim 1, wherein the method comprises the following steps: in the fourth step, in the process that the steel ingot is taken out of the heating furnace and placed on the forging machine, the temperature of the steel ingot is reduced, when the temperature of the steel ingot is reduced to 1150 ℃, forging is started, and a preset frequency is installed for forging; in the last step of forging, the forging temperature of the steel ingot needs to be more than or equal to 950 ℃.

Technical Field

The invention relates to a stainless steel production and processing method, in particular to a manufacturing method for forging and forming crack prevention of duplex stainless steel F53.

Background

When the duplex stainless steel F53 is forged, corner cracks and tensile cracks are easy to occur, and the quality is not good enough. If cracks appear on the outer surface during forging, the cracks need to be cleaned after the product is cooled, and then the forging is reheated. In this way, the efficiency is low and the energy consumption is high. And the forging efficiency is lower, and the energy consumption is higher.

Disclosure of Invention

The invention aims to provide a manufacturing method for forging and forming crack prevention of duplex stainless steel F53, which prevents cracking of a product, reduces energy consumption and improves forging efficiency by using the structure.

In order to achieve the purpose, the invention adopts the technical scheme that: a manufacturing method for forging and forming crack prevention of duplex stainless steel F53 comprises the following steps:

firstly, putting the steel ingot into a heating furnace, charging the steel ingot and avoiding flame direct injection, heating the steel ingot along with the furnace to less than 60 ℃/h, and preserving the heat for 4 hours when the temperature is between 300 and 350 ℃;

secondly, after preserving heat for 4 hours, heating the steel ingot with the temperature of 300-350 ℃ to 1020-1050 ℃ at the speed of 100 ℃/h, and preserving heat for 20 hours;

thirdly, raising the temperature of the steel ingot with the temperature of 1020-1050 ℃ to 1200 ℃ at the speed of 70-100 ℃/h, and preserving the temperature for 20 hours;

fourthly, the steel ingot obtained in the third step is taken out and placed on a forging machine, the steel ingot is lightly patted, rounded and chamfered by utilizing a forging head with an arc-shaped bottom, the steel ingot is straightened and upset, the single pressing amount of the forging head of the forging machine is less than 30mm, the time is kept for 2 seconds, the forging direction is controlled to be 1:1.5 gradually deformed, the steel ingot is rounded 1 time after pressing the product for 100 mm-150 mm each time, and the angular crack and the tensile crack are reduced;

fifthly, cracks appear on the outer surface in the forging process, and are immediately removed by gas cutting in a hot state;

sixthly, placing the blank forged piece with the size into a heating furnace, continuously heating to 1070 ℃, preserving the temperature for 3 hours, and then carrying out solid solution, wherein the water temperature for solid solution is more than 40 ℃.

In the technical scheme, in the step IV, in the process that the steel ingot is taken out of the heating furnace and placed on the forging machine, the temperature of the steel ingot is reduced, when the temperature of the steel ingot is reduced to 1150 ℃, forging is started, and the steel ingot is forged by installing a preset frequency; in the last step of forging, the forging temperature of the steel ingot needs to be more than or equal to 950 ℃.

Due to the application of the technical scheme, compared with the prior art, the invention has the following advantages:

1. according to the invention, through repeated heating and heat preservation, the performance of the product can be improved, the cracking of the product can be reduced during forging and pressing, and meanwhile, the product is directly removed by gas cutting after cracking, so that the forging efficiency and quality are effectively improved, and the energy consumption is reduced;

2. the initial forging temperature is 1150 ℃, and the temperature is 950 ℃ when the forging is finished, so that the crack phenomenon can be avoided, and the forging quality of the product is ensured.

Detailed Description

The invention is further described below with reference to the following examples: