Solid state method for consolidating small pieces of metal into a workpiece
阅读：653发布：2021-02-08
专利汇可以提供Solid state method for consolidating small pieces of metal into a workpiece专利检索，专利查询，专利分析的服务。并且A method is disclosed of converting scrap or other random sized small pieces of steel into a useful, commercial product while maintaining the steel in a solid state. The pieces are baled and compacted until the bale is from 20 percent to 40 percent solid, and thereafter further compacted until the bale becomes solid and substantially free of voids. The bale is then heated and compressed until the pieces are welded together into a cohesive, homogeneous slab. Prior to the completion of bale compression the bale is heated to from 1,200* to 2,350* F. The bale compression is preferably effected by repeated impaction in a harmonic press employing a pair of opposed, oppositely acting platens impacting opposed outer surfaces of the bale.，下面是Solid state method for consolidating small pieces of metal into a workpiece专利的具体信息内容。
1. The method of converting random sized small pieces of steel to a steel body suitable for use in a manufacturing operation while maintaining the steel in a solid state comprising: a. baling the random sized pieces to effect an intertwining of bale pieces which will resist the dissipation of subsequently applied impaction forces and compacting the pieces until the bale is from 20 to 40 percent solid; b. thereafter repetitively impacting the bale until a time when it becomes solid and substantially free of voids and then continuing to repeatedly impact the solid bale until it is a slab having a transverse cross-sectional area less than 70 percent of the area at said time when the bale became solid; and, c. heating said bale to from 1,200* to 2,350* F. prior to the completion of step (b).
2. The method of claim 1 wherein the impaction is performed with a harmonic press.
3. The method of claim 2 wherein the impaction is performed with a pair of opposed, oppositely-acting platens impacting opposed outer surfaces of the bale.
4. The method of converting scrap steel to steel strip comprising the steps of: a. segregating scrap to select scrap pieces having chemistry substantially that of the desired chemistry of a finished product; b. baling the segregated scrap pieces in a baler to produce bales having a predetermined regular shape with at least 20 percent of the volume of said shape being comprised of steel scrap; c. cleaning said scrap prior to a subsequent compaction step either before or after said baling; d. compacting the bale while substantially at ambient temperatures in a cold harmonic press until said bale is a shape having at least 30 percent of its volume composed of steel; e. heating said compressed bale in a two-zone oven to from 700* to 1,000* F. in the first zone in the presence of an oxidizing atmosphere and from 1,200* to 2,350* F. in the second zone in the presence of a reducing atmosphere; and, f. impacting the bale while hot in a hot harmonic press of the type having a pair of opposed platens until the bale is converted to a body composed of solid steel and thereafter continuing to impact the bale until it is reduced to a thickness of no more than 70 percent of its thickness at the time it became a solid piece of steel whereby to convert the scrap to a slab of substantially homogeneous steel.
5. The method of claim 4 wherein said cleaning is accomplished in a rotary kiln.
6. The method of claim 5 wherein said steel is heated to from 1, 000* to 1,200* F. in said kiln in a reducing atmosphere.
7. The method of converting scrap steel to a steel workpiece comprising the steps of: a. segregating the scrap into selected scrap pieces having chemistry substantially that of the desired chemistry of a finished product; b. baling the segregated scrap pieces into a plurality of relatively small bales each having a predetermined regular shape at least 20 percent of the volume of the shape being comprised of steel scrap; c. shipping said bales to another location; d. joining a plurality of bales together to form a larger workpiece composed of said plurality of bales; e. heating said larger workpiece to a temperature of from 1, 200* to 2,350* F.; and, f. impacting said larger workpiece while hot in a harmonic press of the type having a pair of opposed platens until the workpiece is converted to a body composed of solid steel and thereafter continuing to impact the workpiece until it is reduced to a thickness of no more than 70 percent of its thickness at the time it became a solid piece of steel.
8. The method of converting random sized small pieces of steel to a steel body suitable for use in a manufacturing operation while maintaining the steel in a solid staTe comprising: a. baling the random sized pieces to effect an intertwining of bale pieces which will resist the dissipation of subsequently applied impaction forces and compacting the pieces until the bale is from 20 to 40 percent solid; b. thereafter compressing the bale by repetitive impaction until a time when it becomes solid and substantially free of voids and then continuing to compress the solid bale by repeated impaction until it is a slab having a transverse cross-sectional area less than the area at said time when the bale became solid; and, c. heating said bale to from 1,200* to 2,350* F. at least prior to the completion of step (b) and applying forces to all sides of said bale at least in the initiation of step (b).
9. The method of claim 8 wherein the compaction of step (b) performed with cyclically actuated compacting elements.
10. The method of claim 9 wherein the compaction of the completion of step (b) is performed with a pair of opposed, oppositely-acting platens impacting opposed outer surfaces of the bale.
11. The method of claim 8 wherein the compaction of the initial stages of step (b) is provided by a closed-cavity press with said bale ambient temperatures.
12. The method of converting scrap steel to steel strip comprising the steps of: a. segregating scrap to select scrap pieces having chemistry substantially that of the desired chemistry of a finished product; b. baling the segretated scrap pieces to effect an intertwining of scrap pieces which will resist the dissipation of subsequently applied impaction forces in a baler to produce bales having a predetermined regular shape with at least 20 percent of the volume of said shape being comprised of steel scrap; c. cleaning said scrap prior to a subsequent compaction step either before or after said baling; d. repeatedly impacting the bale while substantially at ambient temperatures in a press until said bale has at least 65 percent of its volume composed of steel; e. heating said compressed bale in the range of 1,200* - 2,350* F.; and, f. repeatedly impacting the bale while heated to a density greater than 98 percent of solid.
13. The method of claim 12 wherein said heating and heated compaction are carried out in the presence of a nonoxidizing atmosphere.
14. The method of claim 12 wherein said heated compaction is provided by at least one cyclically actuated compacting element.
15. The method of claim 14 wherein said compaction is provided by a pair of opposed compacting elements carried by a harmonic actuator with said bale passing therebetween for receiving progressive impulsed compactions therealong.
16. The method of claim 15 in which said impulsed compaction is continued until said bale has been reduced at least 30% beyond solid in said heated condition.
17. The method of claim 14 wherein said steel is heated to from 1,000* to 1,200* F. in a rotary kiln in a reducing atmosphere.
18. The method of converting random sized pieces of steel to a steel body suitable for use in a manufacturing operation while maintaining the steel in a solid state comprising: a. cold compacting the random sized pieces to effect an intertwining of pieces which will resist the dissipation of subsequently applied impaction forces until the compacted body is from 80 to 95 percent solid; b. thereafter repeatedly impacting the body until a time when it becomes substantially solid and substantially free of voids and then continuing to repeatedly impact the solid body until it is a slab having a transverse cross-sectional area less than 70 percent of the area at said time when the body became solid; and, c. heating said body to from 2,000* to 2,350* F. at least prior to the completion of step (b).
19. The method of claim 18 wherein said body is subjected to a surface scarfing treatment subsequenT to heating and prior to the completion of step (b).
20. The method of claim 18 wherein said heating and final compaction is carried out under the influence of a reducing atmosphere.
21. The method of claim 18 wherein said pieces are substantially free of oxides on each surface thereof prior to heating.
22. The method of claim 18 in which said cold compacting is carried out in a closed cavity press with applied pressures above 35,000 psi. but not exceeding 75,000 psi.
23. The method of claim 18 in which at least the final portion the cold compaction is carried out in a open end continuous feed press with applied pressures not exceeding 30,000 psi.
24. A method of preparing steel piece material for solid state conversion into a welded workpiece, comprising: a. introducing a supply of random sized steel pieces into a cavity; b. compacting said pieces in said cavity to form a bale with the pieces therein intertwined to resist the dissipation of subsequently applied impaction forces, the bale; c. thereafter repetitively impacting the bale while the pieces are maintained in solid state until it is welded into a solid homogeneous body; and, d. heating the bale to at least 1,250* F. prior to the completion of step (c).
25. The method of claim 24 wherein said cavity is provided with corrugated surfaces to facilitate the folding and intertangling of the outermost bale pieces during compaction and thereby render said bale less pervious and requiring lower applied forces.
26. A method of preparing steel piece material as in claim 24 in which impulsed compactions are applied to said supply of pieces in said cavity to promote greater uniformity of density of said compacted bale.
27. A method of preparing steel piece material as in claim 24, in which said compacting pressures are applied at intervals while only a portion said supply has been introduced to said cavity as well as after said full supply has been introduced to said cavity, to promote greater uniformity of density in the final bale.
28. A method of preparing steel piece material as in claim 24 wherein said compacting forces are applied in more than one cycle to said supply of pieces to promote greater uniformity of density of said completed bale.
29. The method of converting pieces of steel to a solid homogeneous mass of steel suitable for use in a manufacturing operation while maintaining the steel in a solid state, comprising the steps of: a. consolidating a plurality of pieces of steel in order to form a workpiece; b. repeatedly impacting the workpiece while it remains in solid state in order to form a solid body free of voids with the pieces welded together into a solid homogeneous mass of steel; and c. heating the body to at least 1,250* F. prior to the completion of step (b).
30. The method of claim 29 wherein said step of forming a workpiece comprises a cold-compaction operation performed in a closed cavity baler.
31. The method of claim 29 wherein said step of forming a workpiece includes the application of impulsed compaction forces to the pieces of steel to promote greater uniformity of density of the workpiece.
32. The method of claim 29 wherein the repeated impaction of the workpiece is carried out in a harmonic press.
33. The method of claim 29 wherein the repeated impaction of the workpiece is performed with a pair of opposed, oppositely-acting platens impacting outer surfaces of the workpiece.
34. The method of converting pieces of steel to a solid homogeneous mass of steel suitable for use in a manufacturing operation while maintaining the steel in a solid state, comprising the steps of: a. consolidating a plurality of pieces of steel in order to form a workpiece; b. repeatedly impacting the workpiece in a harmonic press while the workpiece remains in solid state in order to form a solid body free of voids with the pieces welded together into a solid homogeneous mass of steel; aNd c. heating the body prior to the completion of step (b) to such temperature as is required in combination with the pressures developed during impaction to effect welding by molecular migration.
35. The method of claim 34 wherein the repeated impaction of the workpiece is performed with a pair of opposed, oppositely acting platens impacting outer surfaces of the workpiece.
36. The method of claim 34 wherein step (c) includes heating the body to from between 1,250* to 2,350* F.
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