Method and apparatus for manufacturing metal material, metal material and metal workpiece

Abstract

To easily prevent adhesion of molten metal at low costs without deteriorating surface quality in a metal material manufacturing method by continuous casting. In continuously casting a metal material S 1 by driving a plurality of rotational molding members 10, 11 in a casting direction, the plurality of rotational molding members 10, 11 being disposed so as to be opposed with each other to form a casting space, lubricating oil is intermittently sprayed onto at least a part of a molten alloy contact surface of at least one of the plurality of rotational molding members 10 or 11.

1 . A method for manufacturing a metal material, characterized in that 
 in continuously casting a metal material by driving a plurality of rotational molding members in a casting direction, the plurality of rotational molding members being disposed so as to be opposed with each other to form a casting space,    wherein lubricating oil is intermittently sprayed onto at least a part of a molten alloy contact surface of at least one of the plurality of rotational molding members.    
   
   
       2 . The method for manufacturing a metal material as recited in  claim 1 , wherein the plurality of rotational molding members are a casting wheel having a groove on its external peripheral surface and a continuous belt for closing the groove.  
   
   
       3 . The method for manufacturing a metal material as recited in  claim 2 , wherein the lubricating oil is applied to the groove of the casting wheel.  
   
   
       4 . The method for manufacturing a metal material as recited in  claim 3 , wherein the lubricating oil is applied only to a side surface portion of the groove of the casting wheel.  
   
   
       5 . The method for manufacturing a metal material as recited in  claim 2 , wherein the lubricating oil is applied to the continuous belt.  
   
   
       6 . The method for manufacturing a metal material as recited in  claim 1  or  2 , wherein the spraying number of times T per second is set to V/(Lp+V×t) to 3V/ (Lp+V×t), where V (mm/s) is a moving speed of a molten alloy contact surface of the rotational molding member, t (s) is a single spraying time, Lp (mm) is a distance of a sprayed range in a casting direction, the sprayed range being formed by a single spraying in a state in which the rotational molding member is stopped.  
   
   
       7 . The method for manufacturing a metal material as recited in  claim 1  or  2 , wherein the spraying of the lubricating oil is performed by a plunger pump.  
   
   
       8 . The method for manufacturing a metal material as recited in  claim 1  or  2 , wherein a single spraying time is 0.001 to 1 s.  
   
   
       9 . The method for manufacturing a metal material as recited in  claim 1  or  2 , wherein a single spraying amount is 0.001 to 1 ml.  
   
   
       10 . The method for manufacturing a metal material as recited in  claim 1  or  2 , wherein a total spraying amount of the lubricating oil is 5 to 150 ml/h.  
   
   
       11 . The method for manufacturing a metal material as recited in  claim 1 , wherein subsequent to the continuous casting, rolling is executed to manufacture a cast rolled material, and wherein the cast rolled material is subjected to multi-stage washing including acid washing or caustic washing.  
   
   
       12 . The method for manufacturing a metal material as recited in  claim 11 , wherein the multi-stage washing is performed while moving the cast rolled material.  
   
   
       13 . The method for manufacturing a metal material as recited in  claim 12 , wherein the multi-stage washing is performed subsequent to the continuous casting and the rolling.  
   
   
       14 . The method for manufacturing a metal material as recited in  claim 12 , wherein the multi-stage washing is performed at a different step after the continuous casting and the rolling.  
   
   
       15 . The method for manufacturing a metal material as recited in  claim 11 , wherein the multi-stage washing is performed after cutting the cast rolled material.  
   
   
       16 . The method for manufacturing a metal material as recited in  claim 11 , wherein the multi-stage washing includes at least one caustic washing and at least one acid washing.  
   
   
       17 . The method for manufacturing a metal material as recited in  claim 16 , wherein the multi-stage washing is performed by caustic washing and acid washing in this order.  
   
   
       18 . The method for manufacturing a metal material as recited in  claim 16 , wherein the multi-stage washing is performed by acid washing, caustic washing and acid washing in this order.  
   
   
       19 . The method for manufacturing a metal material as recited in  claim 11 , wherein washing liquid for the acid washing is any one of nitric acid, sulfuric acid and hydrochloric acid.  
   
   
       20 . The method for manufacturing a metal material as recited in  claim 11 , wherein washing liquid for the caustic washing is sodium hydrate solution or potassium hydrate.  
   
   
       21 . The method for manufacturing a metal material as recited in  claim 11 , wherein washing time for the acid washing or the caustic washing is controlled by a time required for the cast rolled material to pass through each washing bath.  
   
   
       22 . The method for manufacturing a metal material as recited in  claim 11 , wherein the washing bath passing time is set by a length of a washing bath in a moving direction of the cast rolled material.  
   
   
       23 . The method for manufacturing a metal material as recited in  claim 21  or  22 , wherein the washing bath passing time is set by a serpentine distance along which the continuous cast rolled material is advanced in a washing bath.  
   
   
       24 . The method for manufacturing a metal material as recited in  claim 11 , wherein water washing is performed after the acid washing or the caustic washing.  
   
   
       25 . An apparatus for manufacturing a metal material,comprising: 
 a plurality of rotational molding members disposed so as to surround a casting space and driven in a casting direction; and    a lubricating oil spraying means for intermittently spraying the lubricating oil to at least a part of at least a part of the rotational molding members.    
   
   
       26 . The apparatus for manufacturing a metal material as recited in  claim 25 , further comprising rolling means for rolling the cast material, the rolling means being disposed at a rear stage of the rotational molding members, and a plurality of washing baths including an acid washing bath which brings the rolled cast rolled material into contact with acid washing liquid or a caustic washing bath which brings the cast rolled material into contact with caustic washing liquid, wherein these washing baths are disposed in series.  
   
   
       27 . The apparatus for manufacturing a metal material as recited in  claim 26 , wherein at least one acid washing bath which brings the cast rolled material into contact with the acid washing liquid and at least one caustic washing bath which brings the cast rolled material into contact with the caustic washing liquid are provided.  
   
   
       28 . A metal material manufactured by the manufacturing method as recited in  claim 1  or  11 .  
   
   
       29 . A metal workpiece manufactured by subjecting the metal member as recited in  claim 28  to secondary working.  
   
   
       30 . The metal workpiece as recited in  claim 29 , wherein as the secondary working, plastic working or cutting work is executed.