CN104057261A - 120-ton steel ladle manufacturing process - Google Patents

Abstract

The invention relates to a 120-ton steel ladle manufacturing process which comprises the following process steps that firstly, a barrel is divided into two sections to be blanked and wound; trunnions adopt analog shafts to connect trunnion blanks, then the trunnions are integrally processed and two trunnions are assembled on a raised roller carrier by utilizing the analog shafts; then preparation before welding is carried out, a welding region is polished to have metallic luster by an angular finishing grinder, then submerged-arc-welding H08MnA welding wires phi 4.0 are matched with sintered flux to carry out welding, and after outside back gouging is carried out, the submerged-arc-welding H08MnA welding wires phi 4.0 are matched with the sintered flux to carry out welding; then a steel ladle is subjected to heat processing; and finally, the steel ladle is hoisted. The steel ladle manufacturing process disclosed by the invention is characterized in that not only can production quality be ensured, but also the steel ladle can be manufactured under the common production conditions; the 120-ton steel ladle manufacturing process has the advantages of practicality, reliability, safety, improvement for efficiency and the like; meanwhile, production quality can be improved; the cost can be reduced; and the 120-ton steel ladle manufacturing process has higher practical and popularization value.

Description

120 tons of ladle manufacture crafts

Technical field

The invention belongs to metallurgical ladle manufacture technology field, relate to a kind of 120 tons of ladle manufacture crafts.

Background technology

At present, as follows in the general making situation of metallurgical industry steel construction (ladle):

1,, referring to Fig. 5, existing general producer housing docks and dock with the bag end general employing the full submerged-arc welding of root face or full manual welding;

2, the assembling of generally making gudgeon also often both sides locate respectively assembling, general employing hang vertical line and spirit level location, precision is general, and is subject to the factor impacts such as operating mode, assembling and welding.(referring to 150T smelting molten steel bag manufacturing technology [A]; ' 2009 national steel structure Annual Conference collections of thesis [C]; 2009);

3, many working shop of enterprise overhead traveling cranes are less than 30 tons, often just can not carry out 30 tons of above ladles and make.

The difficult problem that general ladle manufacture craft runs into is how to guarantee that ladle design has the concentric requirement of both sides gudgeon in enough safety coefficients and manufacturing process, the assurance of welding quality etc., and be often subject to the restriction of the conditions such as technology, equipment, factory building, cannot carry out the making of medium-and-large-sized ladle.And our manufacture craft is to address these problems preferably.

Summary of the invention

For overcoming above-mentioned technical disadvantages, the invention provides a kind of 120 tons of ladle manufacture crafts, can guarantee to meet under the prerequisite of ladle instructions for use, from aspects such as structural design, material selection, technology for blanking, packaging technology, welding procedure, the liftings of limitation condition, can be applicable to general enterprises.

The present invention solves the technical method that its technical problem adopts: a kind of 120 tons of ladle manufacture crafts, and its processing step is:

The first step: cylindrical shell is divided into two sections of blankings and rolls, hypomere adopts tetra-blocks of 16MnR flaw detection plates of 2900mmX3200, epimere adopts the blanking that welds together of tetra-blocks of 16MnR flaw detection plates of 2900mmX2000, seam inspection is qualified, note every section of blanking height, the monolateral allowance of 15mm is respectively stayed in processing place up and down, during blanking, require to guarantee that steel plate rolling direction is consistent with cylindrical shell bus, joint is opened the bilateral groove in both sides by figure below, require machined groove, every section of full circle is made and is rolled, all should draw a design punch mark quartile bore air-vent φ 10 spacing 400X400 of each piece housing before volume, avoid weld seam, while rolling, should control each drafts depresses several times according to first big after small mode, docking welds and guarantees that through welding weld seam must not need to go up veneer reeling machine school circle after projection again, put again ground sample and guarantee that circularity supports fixing again, hand over machined groove and gudgeon hole to avoid weld seam, the groove of upper lower shell is offered the groove size of first considering hypomere and wrapping connecting part, the end and is offered, should be of a size of benchmark with bag base slope cause for gossip survey and carry out blanking, processing, guarantee that hypomere groove and bag base slope mouth match, carrying out on this basis epimere groove offers again, housing docking and dock the little root face of employing with the bag end or without root face groove, adopt the manual metal-arc welding bottoming welding procedure of submerged-arc welding again, each piece housing and bag end butted part adopt and weld with the turning rolls of the adjustable tapering of submerged arc welding machine band, in when welding, should note should be by simulation axle installation requirement padded making more than ladle low spot anomaly platform distance from bottom is greater than the length 100mm that gudgeon exposes ladle,

Second step: gudgeon first adopts simulation axle to connect gudgeon base, integral body is processed gudgeon again, recycling simulation axle overall package two gudgeons on padded turning rolls, during assembling, first the nearly level in simulation axle one end is stretched into ladle, and then on turning rolls, rotate ladle, and then make to simulate axle and become nearly vertical mode to stretch out from the other end, relocate fixing welding;

The 3rd step: first weld front preparation, with electric angle grinder, welding region is polished to metallic luster, and because of 16Mn responsive and have a side thickness G reatT.GreaT.GT40mm to cold crack, rigidity is large, before weldering, (contain tack welding) and answer 150 ℃ of preheatings, involucrum is opened manual electric arc welding groove X-type with all circumferential welds in the bag end and is first used the first inner side bottoming of E5016 Φ 3.2 welding rods, then with submerged-arc welding H08MnA welding wire Φ 4.0, join sintered flux welding, after the back chipping of outside, with submerged-arc welding H08MnA welding wire Φ 4.0, join sintered flux welding.;

The 4th step: above-mentioned ladle is heat-treated, because of ladle size too large, use special-purpose heating tape equipment to carry out local heat treatmet and notice that local heat treatmet side also answers heat-preservation cotton to cover, during general heat treatment, answer homogeneous heating firing rate cooling velocity all not want too fast;

The 5th step: for can be the separate unit overhead traveling crane crane capacity deficiency in the situation that, handling ladle, we have designed above-mentioned pair of overhead traveling crane hanging beam, to can two overhead traveling cranes allocate and transport together the steel construction piece that ladle also can other great types of handling.

The invention has the beneficial effects as follows: case material adopts 16MnR flaw detection plate gudgeon to adopt forging more can guarantee ladle quality than adopting general employing 16Mn steel plate and foundry goods gudgeon; Housing docks and docks with the bag end and adopts little root face or without root face groove, adopt the manual metal-arc welding bottoming welding procedure of submerged-arc welding again, is not prone to general full submerged welding process and easily burns or lack of penetration defect; The machined of gudgeon hole and employing dummy shaft carry out whole gudgeon processing assembling, can guarantee preferably the axiality of two gudgeons; By pre-padded turning rolls, can carry out the whole dummy shaft of ladle the factory building height deficiency in the situation that assembles; By special numerical control heat treatment facility, carry out post weld heat treatment, fully remove and made the residual stress of welding process generation; By designing special two overhead traveling crane hanging beams, can the in the situation that of separate unit overhead traveling crane crane capacity deficiency, carry out the handling (being no more than 50 tons) of relatively large ladle, the feature of ladle manufacture craft of the present invention is to guarantee that the quality of production can make again under general working condition, and practical reliable, safety and the advantage such as raise the efficiency, can improve the quality of production simultaneously, reduce costs, have higher practical and popularizing value.

Accompanying drawing explanation

Fig. 1 is 120T ladle schematic diagram;

Fig. 2 is that the present invention utilizes simulation axle schematic diagram;

Fig. 3 is that the present invention produces used pair of overhead traveling crane hanging beam schematic diagram;

Fig. 4 is post weld heat treatment curve map;

Fig. 5 is existing groove schematic diagram;

Fig. 6 is groove schematic diagram of the present invention.

The specific embodiment

Below in conjunction with accompanying drawing, the present invention is further described.

120 tons of ladle manufacture crafts, its processing step is:

Referring to Fig. 1 and Fig. 6, the first step: cylindrical shell is divided into two sections of blankings and rolls, hypomere adopts tetra-blocks of 16MnR flaw detection plates of 2900mmX3200, epimere adopts the blanking that welds together of tetra-blocks of 16MnR flaw detection plates of 2900mmX2000, seam inspection is qualified, note every section of blanking height, the monolateral allowance of 15mm is respectively stayed in processing place up and down, during blanking, require to guarantee that steel plate rolling direction is consistent with cylindrical shell bus, joint is opened the bilateral groove in both sides by figure below, require machined groove, every section of full circle is made and is rolled, all should draw a design punch mark quartile bore air-vent φ 10 spacing 400X400 of each piece housing before volume, avoid weld seam, while rolling, should control each drafts depresses several times according to first big after small mode, docking welds and guarantees that through welding weld seam must not need to go up veneer reeling machine school circle after projection again, put again ground sample and guarantee that circularity supports fixing again, hand over machined groove and gudgeon hole to avoid weld seam, the groove of upper lower shell is offered the groove size of first considering hypomere and wrapping connecting part, the end and is offered, should be of a size of benchmark with bag base slope cause for gossip survey and carry out blanking, processing, guarantee that hypomere groove and bag base slope mouth match, carrying out on this basis epimere groove offers again, housing docking and dock the little root face of employing with the bag end or without root face groove, adopt the manual metal-arc welding bottoming welding procedure of submerged-arc welding again, each piece housing and bag end butted part adopt and weld with the turning rolls of the adjustable tapering of submerged arc welding machine band, in when welding, should note should be by simulation axle installation requirement padded making more than ladle low spot anomaly platform distance from bottom is greater than the length 100mm that gudgeon exposes ladle,

Referring to Fig. 2, second step: gudgeon first adopts simulation axle to connect gudgeon base, integral body is processed gudgeon again, recycling simulation axle overall package two gudgeons on padded turning rolls, during assembling, first the nearly level in simulation axle one end is stretched into ladle, and then rotate ladle on turning rolls, and then make to simulate axle and become nearly vertical mode to stretch out from the other end, relocate fixing welding;

The 3rd step: first weld front preparation, with electric angle grinder, welding region is polished to metallic luster, and because of 16Mn responsive and have a side thickness G reatT.GreaT.GT40mm to cold crack, rigidity is large, before weldering, (contain tack welding) and answer 150 ℃ of preheatings, involucrum is opened manual electric arc welding groove X-type with all circumferential welds in the bag end and is first used the first inner side bottoming of E5016 Φ 3.2 welding rods, then with submerged-arc welding H08MnA welding wire Φ 4.0, join sintered flux welding, after the back chipping of outside, with submerged-arc welding H08MnA welding wire Φ 4.0, join sintered flux welding;

Referring to Fig. 4, the 4th step: above-mentioned ladle is heat-treated, because ladle size is too large, use special-purpose heating tape equipment to carry out local heat treatmet and notice that local heat treatmet side also answers heat-preservation cotton to cover, during general heat treatment, answer homogeneous heating firing rate cooling velocity all not want too fast;

Referring to Fig. 3, the 5th step: for can be the separate unit overhead traveling crane crane capacity deficiency in the situation that, handling ladle, we have designed above-mentioned pair of overhead traveling crane hanging beam, to can two overhead traveling cranes allocate and transport together the steel construction piece that ladle also can other great types of handling.

Case material adopts 16MnR flaw detection plate gudgeon to adopt forging more can guarantee ladle quality than adopting general employing 16Mn steel plate and foundry goods gudgeon; Housing docks and docks with the bag end and adopts little root face or without root face groove, adopt the manual metal-arc welding bottoming welding procedure of submerged-arc welding again, is not prone to general full submerged welding process and easily burns or lack of penetration defect; The machined of gudgeon hole and employing dummy shaft carry out whole gudgeon processing assembling, can guarantee preferably the axiality of two gudgeons; By pre-padded turning rolls, can carry out the whole dummy shaft of ladle the factory building height deficiency in the situation that assembles; By special numerical control heat treatment facility, carry out post weld heat treatment, fully remove and make the residual stress that welding process produces; By designing special two overhead traveling crane hanging beams, can the in the situation that of separate unit overhead traveling crane crane capacity deficiency, carry out the handling (being no more than 50 tons) of relatively large ladle, the present invention can guarantee that the quality of production can make again under general working condition, and practical reliable, safety and the advantage such as raise the efficiency, can improve the quality of production simultaneously, reduce costs, have higher practical and popularizing value.

Claims (1)

1. 120 tons of ladle manufacture crafts, is characterized in that processing step is:

The first step: cylindrical shell is divided into two sections of blankings and rolls, hypomere adopts tetra-blocks of 16MnR flaw detection plates of 2900mmX3200, epimere adopts the blanking that welds together of tetra-blocks of 16MnR flaw detection plates of 2900mmX2000, seam inspection is qualified, note every section of blanking height, the monolateral allowance of 15mm is respectively stayed in processing place up and down, during blanking, require to guarantee that steel plate rolling direction is consistent with cylindrical shell bus, joint is opened the bilateral groove in both sides by figure below, require machined groove, every section of full circle is made and is rolled, all should draw a design punch mark quartile bore air-vent φ 10 spacing 400X400 of each piece housing before volume, avoid weld seam, while rolling, should control each drafts depresses several times according to first big after small mode, docking welds and guarantees that through welding weld seam must not need to go up veneer reeling machine school circle after projection again, put again ground sample and guarantee that circularity supports fixing again, hand over machined groove and gudgeon hole to avoid weld seam, the groove of upper lower shell is offered the groove size of first considering hypomere and wrapping connecting part, the end and is offered, should be of a size of benchmark with bag base slope cause for gossip survey and carry out blanking, processing, guarantee that hypomere groove and bag base slope mouth match, carrying out on this basis epimere groove offers again, housing docking and dock the little root face of employing with the bag end or without root face groove, adopt the manual metal-arc welding bottoming welding procedure of submerged-arc welding again, each piece housing and bag end butted part adopt and weld with the turning rolls of the adjustable tapering of submerged arc welding machine band, in when welding, should note should be by simulation axle installation requirement padded making more than ladle low spot anomaly platform distance from bottom is greater than the length 100mm that gudgeon exposes ladle,

Second step: gudgeon first adopts simulation axle to connect gudgeon base, integral body is processed gudgeon again, recycling simulation axle overall package two gudgeons on padded turning rolls, during assembling, first the nearly level in simulation axle one end is stretched into ladle, and then on turning rolls, rotate ladle, and then make to simulate axle and become nearly vertical mode to stretch out from the other end, relocate fixing welding;

The 3rd step: first weld front preparation, with electric angle grinder, welding region is polished to metallic luster, and because of 16Mn responsive and have a side thickness G reatT.GreaT.GT40mm to cold crack, rigidity is large, before weldering, (contain tack welding) and answer 150 ℃ of preheatings, involucrum is opened manual electric arc welding groove X-type with all circumferential welds in the bag end and is first used the first inner side bottoming of E5016 Φ 3.2 welding rods, then with submerged-arc welding H08MnA welding wire Φ 4.0, join sintered flux welding, after the back chipping of outside, with submerged-arc welding H08MnA welding wire Φ 4.0, join sintered flux welding;

The 4th step: above-mentioned ladle is heat-treated, because of ladle size too large, use special-purpose heating tape equipment to carry out local heat treatmet and notice that local heat treatmet side also answers heat-preservation cotton to cover, during general heat treatment, answer homogeneous heating firing rate cooling velocity all not want too fast;

The 5th step: for can be the separate unit overhead traveling crane crane capacity deficiency in the situation that, handling ladle, we have designed above-mentioned pair of overhead traveling crane hanging beam, to can two overhead traveling cranes allocate and transport together the steel construction piece that ladle also can other great types of handling.