CN105628437A

CN105628437A - Furnace-front sampling method for copper alloy cast with upward casting process

Info

Publication number: CN105628437A
Application number: CN201510961796.1A
Authority: CN
Inventors: 邓俊; 黄奇春; 秦雅各
Original assignee: Ganzhou Jiangwu La Farga High Speed Railway Copper Materials Co Ltd
Current assignee: Ganzhou Jiangwu La Farga High Speed Railway Copper Materials Co Ltd
Priority date: 2015-12-21
Filing date: 2015-12-21
Publication date: 2016-06-01

Abstract

A furnace-front sampling method for copper alloy cast with an upward casting process is characterized by four operation steps including bar leading preparation, bar leading, sampling and inspection. The sampling method has the advantages that risks of disturbance to molten copper and air suction of the molten copper in a sampling process are avoided, the probability of appearance of inclusions, hollowness and crack defects of cast copper bars is lowered, and uniformity between sampling operation and sampling tools is achieved at the same time, therefore, while the labor intensity of workers is reduced, neither special sampling spoons nor releasing agents are required; samples are neat, bottom parts do not have defects such as blowholes and the like, the subsequent sample milling operation is facilitated for detectors, constituents are uniform, and detection results are consistent with actual constituents of the molten copper in a furnace.

Description

A kind of stokehold sampling method of up-drawing method copper alloy casting

Technical field

The present invention relates to a kind of sampling method, be applied to the stokehold sampling link of up-drawing method casting copper bar base production process.

Background technology

Casting in the production process of copper bar base at up-drawing method, stokehold samples to carry out composition detection, is the Main Means following the tracks of copper liquid composition transfer, is also the important evidence that alloying component in copper liquid could be adjusted to ensure slab quality. The stokehold sampling method in the past adopted, as: use special sample spoon, at the upper insulation furnace inner sampling drawing stove. This method needs to smear parting agent special on the inwall of sample spoon, and operator to push the covering material on copper liquid aside when sampling, then is stretched into by sample spoon in copper liquid. After having sampled, to fill out and reply cover material, after the copper liquid in cooling spoon, demoulding censorship. Its shortcoming is: one, sample spoon is directly protruding into copper liquid, copper liquid is caused disturbance, it is possible to cause that dreg defect occurs in copper bar; Two, during sampling, the covering material on copper liquid to be pushed aside, increase the probability of copper liquid air-breathing, it is possible to cause that copper bar is hollow, crackle. Three, needing to prepare special sample spoon and releasing agent, add cost, releasing agent needs to be placed on table and keeps moistening simultaneously, adds security risk. Four, have trachoma bottom the sample taken, it is necessary to thicker one layer of mill off before detection, sometimes pore too much, excessively deep, also need to resample. Five, there is the phenomenon of segregation the sample local taken, it is possible to testing result is impacted.

Summary of the invention

It is an object of the invention to provide the stokehold sampling method of a kind of up-drawing method copper alloy casting, it is to avoid risk to the disturbance of copper water and copper water oxygen uptake in sampling process, reduce casting copper bar and occur being mingled with, the probability of hollow, crack defect.

A kind of stokehold sampling method of up-drawing method copper alloy casting, it is characterised in that: include drawing bar and prepare �� draw bar �� sampling �� censorship, four operating procedures; Drawing bar preparation process is use skin hammer, screwdriver, locking pliers, draw rod assemble being used for drawing the crystallizer of bar, graphite mo(u)ld, graphite cannula and 16 bronze medals, and clog the gap between graphite cannula and crystalliser head with the aluminosilicate fiberboard containing chromium, prevent graphite cannula landing, also avoid drawing copper liquid during bar simultaneously and flow into from gap; Draw bar step be the crystallizer assembled is placed to draw stove draw bar position, want sum of parameters according to the operation normally drawing bar, use steel thimble, long handle fire tongs, draw a copper bar.

A kind of stokehold sampling method of up-drawing method copper alloy casting, it is characterized in that: described sampling procedure is after being pulled out at the position contacted with copper liquid when starting to draw bar and drawing stove two-layer platform top, the a bit of of lower 5cm length is cut out with special hydraulic pressure, here it is for the sample detecting copper water constituent, stop traction thief rod after sampling.

A kind of stokehold sampling method of up-drawing method copper alloy casting, it is characterised in that: described censorship step is by labelled for the sample that takes, indicates sample time and heat (batch) number, delivers quality management sector and carries out composition detection, and the residual copper bar drawn during by sampling melts down.

The sampling method advantage of the present invention is: avoid the risk to the disturbance of copper water and copper water air-breathing in sampling process, reduce casting copper bar and occur being mingled with, the probability of hollow, crack defect, it is simultaneously achieved the unification of sampling operation and sampling instrument, while alleviating the labor intensity of workman, also need not prepare special sample spoon and releasing agent. Sample is regular, and bottom, without defects such as trachomas, is conducive to the milling sample operation that testing staff is follow-up, and composition is uniform, and testing result is coincide with the actual constituent of copper water in stove.

Accompanying drawing explanation

Fig. 1 be the present invention up-drawing method copper alloy foundry furnace before sampling method operational flowchart.

Detailed description of the invention

In conjunction with accompanying drawing 1, the invention will be further described:

As shown in Figure 1, the stokehold sampling method of a kind of up-drawing method copper alloy casting, it is characterised in that: include drawing bar and prepare �� draw bar �� sampling �� censorship, four operating procedures; Drawing bar preparation process is use the instruments such as skin hammer, screwdriver, locking pliers, draw rod assemble being used for drawing the crystallizer of bar, graphite mo(u)ld, graphite cannula and 16 bronze medals, and clog the gap between graphite cannula and crystalliser head with the aluminosilicate fiberboard containing chromium, prevent graphite cannula landing, also avoid drawing copper liquid during bar simultaneously and flow into from gap. Then the crystallizer assembled is placed to the 3# drawing stove and draws bar position, want sum of parameters according to the operation normally drawing bar, use the instrument such as steel thimble, long handle fire tongs, draw a copper bar. Again the position contacted with copper liquid when starting to draw bar is pulled out after drawing stove two-layer platform top, the a bit of of lower about 5cm length is cut out with special hydraulic pressure, here it is for the sample detecting copper water constituent, it is have the joint below the head of a circle black oxidation skin above, after sampling, stops traction thief rod. Finally by labelled for the sample that takes, indicate sample time and heat (batch) number, deliver quality management sector and carry out composition detection, and the residual copper bar drawn during by sampling melts down. When needing again to sample, repeat sampling and censorship step above.

Above content is in conjunction with concrete preferred implementation further description made for the present invention, it is impossible to assert that specific embodiment of the invention is confined to these explanations. For general technical staff of the technical field of the invention; make some equivalent replacements or obvious modification without departing from the inventive concept of the premise; and performance or purposes are identical, then should be considered as belonging to the protection domain that the submitted claims of the present invention are determined.

Claims

1. the stokehold sampling method of a up-drawing method copper alloy casting, it is characterised in that: include drawing bar and prepare �� draw bar �� sampling �� censorship, four operating procedures; Drawing bar preparation process is use skin hammer, screwdriver, locking pliers, draw rod assemble being used for drawing the crystallizer of bar, graphite mo(u)ld, graphite cannula and 16 bronze medals, and clog the gap between graphite cannula and crystalliser head with the aluminosilicate fiberboard containing chromium, prevent graphite cannula landing, also avoid drawing copper liquid during bar simultaneously and flow into from gap; Draw bar step be the crystallizer assembled is placed to draw stove draw bar position, want sum of parameters according to the operation normally drawing bar, use steel thimble, long handle fire tongs, draw a copper bar.

2. the stokehold sampling method of up-drawing method copper alloy according to claim 1 casting, it is characterized in that: described sampling procedure is after being pulled out at the position contacted with copper liquid when starting to draw bar and drawing stove two-layer platform top, the a bit of of lower 5cm length is cut out with special hydraulic pressure, here it is for the sample detecting copper water constituent, stop traction thief rod after sampling.

3. the stokehold sampling method of up-drawing method copper alloy according to claim 1 and 2 casting, it is characterized in that: described censorship step is by labelled for the sample that takes, indicate sample time and heat (batch) number, deliver quality management sector and carry out composition detection, and the residual copper bar drawn during by sampling melts down.