CN103433319A - Manufacture method of stainless steel external wall panel for rail vehicle - Google Patents
Manufacture method of stainless steel external wall panel for rail vehicle Download PDFInfo
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- CN103433319A CN103433319A CN2013103427184A CN201310342718A CN103433319A CN 103433319 A CN103433319 A CN 103433319A CN 2013103427184 A CN2013103427184 A CN 2013103427184A CN 201310342718 A CN201310342718 A CN 201310342718A CN 103433319 A CN103433319 A CN 103433319A
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Abstract
The invention discloses a manufacture method of a stainless steel external wall panel for rail vehicle. The method sequentially comprises the following steps: firstly, annealing and pickling of a black hot coil, secondly, rough rolling by using a multi-roll mill, thirdly, rough grinding, fourthly, finish rolling by using the multi-roll mill, fifthly, annealing and pickling of a cold coil, sixthly, leveling production, seventhly, finish grinding, and eighthly, cutting plates by a transverse cutting unit. The method has the advantages that the product performance and the surface quality are guaranteed through the reasonable arrangement and collocation of all production processes, the processes of rough rolling and rough grinding are adopted, so as to eliminate the surface defect of raw material and guarantee the surface quality of final products, specified yield strength, tensile strength and elongation are achieved through a leveling mode, and the grinding time of all racks is controlled during grinding, so that required surface requirements are achieved.
Description
Technical field
The present invention relates to a kind of stainless manufacture method, especially a kind of manufacture method of used for rail vehicle Side fascia.
Background technology
SUS301L type of stainless steel C content is low, and contains a certain amount of N, and when having corrosion-resistant, welding performance good characteristics, intensity is higher, is the rail vehicle special stainless steel.
The SUS301L description is many, it is the highest product of current stainless-steel cold-rolling production difficulty, for avoiding light pollution, be convenient to maintenance and clean simultaneously, and exempt from the subsequent treatment such as paint, the Side fascia of stainless steel rail vehicle, have relatively high expectations to stainless surface smoothness at present, most of BG80 product that directly uses the SUS301L steel grade.The BG80 product refers to the processing of stainless steel through a series of cold rolling process, then uses 80
#the abrasive sand belt grinding goes out the particular surface lines, and this product is hard state steel.The BG80 product requires very high to mechanical performance, surface quality, grinding lines, steel-plate shape, for guaranteeing surface quality and performance, the manufacturing flow process of the routine of BG80 is complicated, various, and how by simple technique, guaranteeing to stablize, produce reliably this product is a more scabrous problem at present.
Summary of the invention
Technical problem to be solved by this invention is to provide a kind of manufacture method of used for rail vehicle stainless steel Side fascia, and process stabilization is reliable, and can guarantee stainless performance.
The present invention solves the problems of the technologies described above adopted technical scheme: a kind of manufacture method of used for rail vehicle stainless steel Side fascia comprises the following steps successively:
1) casting skin hot rolling annealing and pickling: the steel plate raw material is heat-treated, and annealing temperature is 1050～1120 ℃, and the oxide skin produced in annealing is removed in pickling;
2) multi-roll mill roughing: the roughing reduction ratio is 20～30%;
3) rough lapping: adopt a plurality of grinding frames to remove the surperficial raw material defect of steel plate;
4) multi-roll mill finish rolling: coil of strip is rolled down to required thickness;
5) cold coiling annealing and pickling: annealing temperature is 1050～1120 ℃.
It is characterized in that, further comprising the steps of:
6) smooth production: at least two passages of smooth production, the breaking elongation of each passage requires, more than >=0.5%, to make steel plate reach the mechanical performance of regulation;
7) smooth grinding: adopt 3～4 to grind frame, 80 of 1st～2 frames uses 200～800 minutes
#grind abrasive band, all the other frames use 20～100 minutes 80
#grind abrasive band;
8) crosscut unit cutting plate: use the crosscut unit that is equipped with straightener, carry out cutting plate, the unevenness≤3mm of actual steel-plate shape.
Step 3) in, adopt 5～6 to grind frame, 1st～2 frames are used 80
#the new abrasive band of grinding, all the other frames are used the grinding abrasive band of 100～500 minutes, and two blemish that step causes before eliminating, improve presentation quality, for obtaining high-quality finished surface, creates conditions.
Step 6) in, the mechanical performance of the described regulation of steel plate is: yield strength 350～400Mpa, tensile strength 690～780Mpa, percentage elongation >=40%.
Step 7) in, the grinding electric current is 60～80A, and unit speed is 20～30mpm, controls the time of abrasive sand belt grinding, reaches required surface requirements.
Step 7) in, adopting alkali lye degreasing, concentration of lye after smooth grinding is 3～10%, the grinding oil of surface attachment is removed clean.
Step 8) in, paste laser cutting privacy protection film on the steel plate of crosscut, thereby meet the following process requirement.
Compared with prior art, the invention has the advantages that: reasonable arrangement and collocation by each production process have guaranteed properties of product and surface quality; For eliminating the stock chart planar defect, guarantee the final products surface quality, used roughing, rough lapping operation; Adopt smooth mode reach regulation yield strength, draw anti-intensity and percentage elongation, be convenient to very much control mechanical performance and the plate shape of product, greatly reduced production difficulty; Control each frame and grind the milling time in abrasive band when grinding, to reach required surface requirements.
The accompanying drawing explanation
The flow chart that Fig. 1 is manufacture method of the present invention.
The specific embodiment
Below in conjunction with accompanying drawing, embodiment is described in further detail the present invention.
Referring to Fig. 1, a kind of manufacture method of used for rail vehicle stainless steel Side fascia comprises the following steps:
1) casting skin hot rolling annealing and pickling (APH): in order to obtain best serviceability, the steel plate raw material is heat-treated, preferably 1050～1120 ℃ of its annealing temperatures, the oxide skin of employing is removed technique, the pre-pickling of sulfuric acid, nitration mixture (HNO3+HF) production technology with conventional SUS304 stainless steel.
2) multi-roll mill roughing: in the present embodiment, preferably use 20 rod milling trains, the roughing reduction ratio is 20～30%, thereby revises rolled steel plate shape, exposed surface defect, is step 3) prepare.
3) rough lapping: eliminate above-mentioned two blemish that step causes, improve presentation quality, create conditions for obtaining high-quality finished surface.For guaranteeing surperficial raw material defect removal ability, in the present embodiment, the rough lapping unit preferably adopts 5～6 to grind frames, and 1st～2 frames are used 80
#the new abrasive band of grinding, all the other frames are used the grinding abrasive band of 100～800 minutes (this time grinds the cumulative time that abrasive band is brought into use for new), the new abrasive band of grinding is after use a period of time, sand grains attenuates, be referred to as to grind abrasive band, by the wearing and tearing that mean sand grains service time and the process that attenuates, the grinding electric current control is at 60～85A, and unit speed is controlled at 10～20mpm; The rough lapping purpose is to remove surperficial raw material defect, guarantees final surface quality.
4) multi-roll mill finish rolling: in the present embodiment, preferably use mill, the coil of strip after rough lapping is rolled down to required thickness, be generally 1.5～2.0mm, it is 0～10I-unit that the limit wave requires to control.
5) cold coiling annealing and pickling (APC): preferably 1050～1120 ℃ of annealing temperatures, the sodium sulphate electrolysis of employing, nitric acid electrification, nitration mixture (HNO3+HF) technique are with conventional SUS304 stainless steel.
6) smooth production: during conventional hard state production, usually adopt skin-pass, be the mechanical performance that reaches regulation, after pickling annealing, then depress distortion (skin-pass) through certain.The hard state product requirement of BG80 moderate strength, plate shape requires very high.If the BG80 product carries out skin-pass, can produce that intensity is higher, plate shape is not easy the problems such as control.For reaching performance requirement, the present invention adopts the mode of smooth production, and adopts smooth mode, is convenient to very much control mechanical performance and the plate shape of product, has greatly reduced production difficulty, with conventional skin-pass, compares, and has larger superiority.Two passages of smooth production or more than, be 2 passages under normal circumstances, rare occasion is (as quality problems occurred, need to reprocess) be 3 passages, roll-force is 250～400 tons, and the total tension force in front and back is 12～15 tons, and the breaking elongation of each passage requires more than >=0.5%.By the smooth distortion of multi-pass, can adjust the product mechanical performance thus, increase product strength, reach the numerical value of regulation: yield strength 350～400Mpa, tensile strength 690～780Mpa, percentage elongation >=40%, thus meet the rail vehicle industry standard.
7) smooth grinding, degreasing: the smooth grinding unit drops into 3～4 and grinds frame, 80 of 1st～2 frames uses 200～800 minutes
#grind abrasive band (this time grinds the cumulative time that abrasive band is brought into use for new), for reaching required surface grinding lines, 80 of 3rd～4 frames uses 20～100 minutes
#grind abrasive band, the grinding electric current control is at 60～80A, and unit speed is controlled at 20～30mpm, controls the time of grinding abrasive band, reaches required surface requirements.
Adopting alkali lye degreasing, concentration of lye after smooth grinding is 3～10%, the grinding oil of surface attachment is removed clean.
8) crosscut unit cutting plate, overlay film: use the crosscut unit that is equipped with straightener, carry out cutting plate production, actual plate shape is controlled steel plate unevenness≤3mm, for meeting the following process requirement, before cutting, pastes laser cutting privacy protection film on steel plate.
The foregoing is only the preferred embodiment of the present invention, it should be pointed out that for the ordinary skill in the art, not breaking away under principle prerequisite of the present invention, can also make various deformation and improvement, this also should be considered as protection scope of the present invention.
Claims (6)
1. the manufacture method of a used for rail vehicle stainless steel Side fascia comprises the following steps successively:
1) casting skin hot rolling annealing and pickling: the steel plate raw material is heat-treated, and annealing temperature is 1050～1120 ℃, and the oxide skin produced in annealing is removed in pickling;
2) multi-roll mill roughing: the roughing reduction ratio is 20～30%;
3) rough lapping: adopt a plurality of grinding frames to remove the surperficial raw material defect of steel plate;
4) multi-roll mill finish rolling: coil of strip is rolled down to required thickness;
5) cold coiling annealing and pickling: annealing temperature is 1050～1120 ℃;
It is characterized in that, further comprising the steps of:
6) smooth production: at least two passages of smooth production, the breaking elongation of each passage requires, more than >=0.5%, to make steel plate reach the mechanical performance of regulation;
7) smooth grinding: adopt 3～4 to grind frame, the 80# that 1st～2 frames are used 200～800 minutes grinds abrasive band, and the 80# that all the other frames are used 20～100 minutes grinds abrasive band;
8) crosscut unit cutting plate: use the crosscut unit that is equipped with straightener, carry out cutting plate, the unevenness≤3mm of actual steel-plate shape.
2. manufacture method as claimed in claim 1, is characterized in that step 3) in, adopt 5～6 to grind frame, 1st～2 frames are used 80# newly to grind abrasive band, and all the other frames are used the grinding abrasive band of 100～500 minutes.
3. manufacture method as claimed in claim 1, is characterized in that step 6) in, the mechanical performance of the described regulation of steel plate is: yield strength 350～400Mpa, tensile strength 690～780Mpa, percentage elongation >=40%.
4. manufacture method as claimed in claim 1, is characterized in that step 7) in, the grinding electric current is 60～80A, unit speed is 20～30mpm.
5. manufacture method as claimed in claim 1, is characterized in that step 7) in, adopting alkali lye degreasing, concentration of lye after smooth grinding is 3～10%, the grinding oil of surface attachment is removed clean.
6. manufacture method as claimed in claim 1, is characterized in that step 8) in, paste laser cutting privacy protection film on the steel plate of crosscut.
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Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN104289551A (en) * | 2014-09-16 | 2015-01-21 | 宁波宝新不锈钢有限公司 | Manufacture method of product with thickness of hard steel |
| CN105057350A (en) * | 2015-08-26 | 2015-11-18 | 山西太钢不锈钢股份有限公司 | Method for rolling stainless steel for vehicles |
| CN106757296A (en) * | 2016-12-16 | 2017-05-31 | 江苏华久辐条制造有限公司 | A kind of low acid consumption high-quality cold-rolled strip acid cleaning process |
| CN108857591A (en) * | 2018-06-27 | 2018-11-23 | 张家港浦项不锈钢有限公司 | A kind of preparation method of 304 stainless steel thickness material mirror surface |
| CN110125768A (en) * | 2018-02-09 | 2019-08-16 | 张家港浦项不锈钢有限公司 | A kind of grinding technics of stainless steel coil of strip M type crackle |
| CN113102506A (en) * | 2021-03-30 | 2021-07-13 | 天津太钢天管不锈钢有限公司 | Manufacturing method of austenitic stainless steel |
| CN114653773A (en) * | 2022-03-15 | 2022-06-24 | 宁波宝新不锈钢有限公司 | Processing method of stainless steel grinding product for rail transit carrier |
| CN115091320A (en) * | 2022-07-11 | 2022-09-23 | 山西太钢不锈钢股份有限公司 | Preparation method of stainless steel frosted panel for carriage |
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Cited By (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104289551A (en) * | 2014-09-16 | 2015-01-21 | 宁波宝新不锈钢有限公司 | Manufacture method of product with thickness of hard steel |
| CN105057350A (en) * | 2015-08-26 | 2015-11-18 | 山西太钢不锈钢股份有限公司 | Method for rolling stainless steel for vehicles |
| CN106757296A (en) * | 2016-12-16 | 2017-05-31 | 江苏华久辐条制造有限公司 | A kind of low acid consumption high-quality cold-rolled strip acid cleaning process |
| CN110125768A (en) * | 2018-02-09 | 2019-08-16 | 张家港浦项不锈钢有限公司 | A kind of grinding technics of stainless steel coil of strip M type crackle |
| CN110125768B (en) * | 2018-02-09 | 2020-10-27 | 浦项(张家港)不锈钢股份有限公司 | Grinding process for M-shaped cracks of stainless steel coil |
| CN108857591A (en) * | 2018-06-27 | 2018-11-23 | 张家港浦项不锈钢有限公司 | A kind of preparation method of 304 stainless steel thickness material mirror surface |
| CN113102506A (en) * | 2021-03-30 | 2021-07-13 | 天津太钢天管不锈钢有限公司 | Manufacturing method of austenitic stainless steel |
| CN114653773A (en) * | 2022-03-15 | 2022-06-24 | 宁波宝新不锈钢有限公司 | Processing method of stainless steel grinding product for rail transit carrier |
| CN114653773B (en) * | 2022-03-15 | 2024-01-12 | 宁波宝新不锈钢有限公司 | Processing method of stainless steel grinding product for rail transit carrier |
| CN115091320A (en) * | 2022-07-11 | 2022-09-23 | 山西太钢不锈钢股份有限公司 | Preparation method of stainless steel frosted panel for carriage |
| CN115091320B (en) * | 2022-07-11 | 2024-04-02 | 山西太钢不锈钢股份有限公司 | Preparation method of stainless steel grinding panel for carriage |
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