CN1297357C

CN1297357C - Method for producing cold rolled high manganese steel strip overlapping composite lining plate

Info

Publication number: CN1297357C
Application number: CNB2004100260397A
Authority: CN
Inventors: 许云华; 武宏
Original assignee: Xian University of Architecture and Technology
Current assignee: Xian University of Architecture and Technology
Priority date: 2004-04-14
Filing date: 2004-04-14
Publication date: 2007-01-31
Anticipated expiration: 2024-04-14
Also published as: CN1683092A

Abstract

The present invention discloses a producing method for superimposed composite lining boards of cold rolling high manganese steel strips. The method comprises the steps that high manganese steel blanks obtained through smelting and casting are rolled in the hot mode into high manganese steel strips; water toughening is carried out, and the high manganese steel strips are made into the cold rolling high manganese steel strips through cold rolling; a frame for the appearance is manufactured according to the structural size of the lining board, and the cold rolling high manganese steel strips are tightly superimposed one by one in the external frame; and consequently, the integral composite lining board is finally formed. The lining board manufactured by the method can replace traditional cast lining boards; not only is the original matrix structure of high manganese steel maintained, but also the original hardness and the intensity are enhanced; and consequently, the abrasion resistance is fully exerted.

Description

The preparation method of cold rolled high manganese steel strip stack composite liner

Technical field

The present invention relates to the preparation method of a kind of pulverizing, the widely used composite liner of field of milling, particularly this field is with the preparation method of the compound liner plate of high manganese steel strip stack.

Background technology

Liner plates mechanically such as the pulverizing of industrial trade extensive uses such as metallurgy, mine, electric power, building materials, grinding, powder process, conveying are main wear-out parts, particularly as the ball mill of pulverizing milling apparatus, its wear liner is serious, replacing is frequent, consumption is very big; The main material of making liner plate at present both at home and abroad is a potassium steel, traditional manufacture craft is to pass through metallurgical casting, directly cast the liner plate of single potassium steel material, and carry out the tough processing of water, form austenitic matrix, because potassium steel is under the high energy impact events abrasive conditions, feature with work hardening, show good wearability, and cost of manufacture is cheap, thereby has obtained using widely in the pulverizing field of milling; But the research according to the modern times is thought, the generation of the work hardening of potassium steel must obtain enough impact energys, and general grinding operating mode can not provide enough energy to impel it to change, the liner plate of simultaneously traditional casting processing, austenitizing is also incomplete, and crystal grain is thick, also be easy to generate the cast inside defective, general hardness number HRC＜30 have had a strong impact on potassium steel anti-wear performance and serviceability, have caused a large amount of wastes of material.In order to change this situation, generally adopt the method for machinery or explosion, improve the initial performance of potassium steel, hardness number can reach HRC＞50, makes it obtain better hardness and intensity before use, thereby in use brings into play its good wearability.High manganese steel lining plate is in pulverizing, field of milling still dominate at present, consumption is huge, the standby redundancy that Chang Zuowei industrial enterprise are daily, it is the very important key factor of enterprise cost accounting, therefore replace traditional as cast condition high manganese steel lining plate, improve its anti-wear performance and serviceability, improve comprehensive utilization ratio, the unnecessary loss and the waste of minimizing of potassium steel, will produce far-reaching influence pulverizing field of milling, directly, indirect economic effect is remarkable.

Summary of the invention

The object of the present invention is to provide a kind of original matrix of potassium steel that both kept, improve its initial hardness, intensity again, make the preparation method of the cold rolled high manganese steel strip stack composite liner that its wearability is not fully exerted; The liner plate of making of this method can replace traditional as cast condition high manganese steel lining plate, through its HRC of high manganese steel strip＞50 of cold-rolling treatment, far above as cast condition potassium steel hardness, is enough to guarantee that potassium steel brings into play its wearability.Though this preparation method is than directly casting complexity, its constant product quality, yield rate height, greatly improve service life, can reach 4～6 times of as cast condition potassium steel, can realize that simultaneously mechanization produces continuously, the preparation efficiency height, to increase unit cost lower, has the tangible ratio of performance to price.

In order to solve the problems of the technologies described above, the present invention is achieved in that the potassium steel blank that metallurgy and foundry is become through hot rolling, rolls into high manganese steel strip, carry out the tough processing of water, carry out cold rollingly then, make cold rolling high manganese steel strip (1), shear machine-shaping according to the liner plate dimensional requirement; Structure fabrication profile frame (2) according to liner plate closely superposes in profile frame (2) then piecewise, the final composite liner that forms integral body.

Hot rolling rolls into high manganese steel strip, thickness＜4mm, width＜200mm; High manganese steel strip after the cold-rolling treatment (1) thickness is 2-3mm; Profile frame (2) and cold rolled high manganese steel strip (1) are by inlaying or wedge structure cooperates assembling, and profile frame (2) can be made of general steel plate or high manganese steel sheet.

The invention has the beneficial effects as follows:

1, high manganese steel strip stack composite liner has improved the initial performance of potassium steel, hardness HRC＞50, make the interior tissue refinement by rolling, casting flaw obviously reduces, its anti-wear performance is significantly improved, and the 4-6 that can reach as cast condition potassium steel service life has doubly improved the use utilization ratio of potassium steel, have tangible ratio of performance to price advantage, economic benefit and social benefit are fairly obvious.

2, casting, hot rolling, cold rolling, the compound manufacture craft that superposes, and can carry out Compound Machining according to different lining plate structures, the yield rate height, steady quality can carry out in enormous quantities, production continuously, realizes mechanization, and labour intensity is low, the production efficiency height.

Description of drawings:

Fig. 1 is a structure chart of the present invention;

Fig. 2 is an embodiment of the invention wedge structure profile;

Fig. 3 inlays the shape section of structure for the embodiment of the invention.

The specific embodiment:

Implementation process:

1, uses smelting equipment such as intermediate frequency furnace, smelt the potassium steel material, casting potassium steel blank;

2, the potassium steel blank is carried out pickling, repairing a die, after the heat treated, utilizing equipment of hot rolling, it is rolled into high manganese steel strip, thickness should＜4mm, width should＜200mm, and carry out the tough processing of water.

3, after the high manganese steel strip pickling after the tough processing to water, rust cleaning, utilize cold-rolling equipment to be rolled, finally form the cold rolled high manganese steel strip of 2-3mm.

4, according to the structure of liner plate and different working condition requirements, useful general steel plate or high manganese steel sheet are made the profile frame, high manganese steel strip is sheared processing, adopt wedge structure (Fig. 2) or mosaic texture (Fig. 3) in the profile frame, the cold rolled high manganese steel strip that processes to be closely combined stack piecewise then, carry out consolidation process with welding rod special for special such as stainless steels at last, polishing is repaired, just prepare the cold rolled high manganese steel strip stack composite liner shown in figure (2), figure (3).

Claims

1, a kind of preparation method of cold rolled high manganese steel strip stack composite liner is characterized in that: the potassium steel blank process hot rolling with metallurgy and foundry becomes rolls into high manganese steel strip, carry out the tough processing of water, carry out cold rollingly then, make cold rolling high manganese steel strip (1), shear machine-shaping according to the liner plate dimensional requirement; Structure fabrication profile frame (2) according to liner plate closely superposes in profile frame (2) then piecewise, finally forms whole composite liner.

2, the preparation method of cold rolled high manganese steel strip stack composite liner according to claim 1 is characterized in that: the high manganese steel strip that hot rolling rolls into, thickness＜4mm, width＜200mm.

3, the preparation method of cold rolled high manganese steel strip stack composite liner according to claim 1, it is characterized in that: the high manganese steel strip after the cold-rolling treatment (1) thickness is 2-3mm.

4, the preparation method of cold rolled high manganese steel strip according to claim 1 stack composite liner is characterized in that: profile frame (2) and cold rolled high manganese steel strip (1) are by inlaying or wedge structure cooperates assembling.

5, the preparation method of cold rolled high manganese steel strip stack composite liner according to claim 1 is characterized in that: profile frame (2) can be made of general steel plate or high manganese steel sheet.