Wei Yuhui didn't say much on the phone. She just said that a problem was found during a routine inspection in the afternoon. It was not known whether it was caused by the process or the welding worker's operation. She asked him to go back as soon as possible after the meeting.
Without saying a word, Zhao Jingfu got on his bike and ran to the welding site. He even forgot to return the work clothes he was wearing to Yuan Feng.
Yuan Feng and Feng Chen stood downstairs and looked at Zhao Jingfu's anxious look. They both saw a kind of uneasiness in each other's eyes. Things that can make Zhao Jingfu so anxious are definitely not trivial matters.
Zhao Jingfu rushed to the welding site in one breath. Wei Yuhui was leading a few people around a piece of steel plate that had been welded and talking about something. Three or four workers stood aside with very ugly expressions.
"What happened?" Zhao Jingfu rode directly in front of the two of them.
Seeing Zhao Jingfu coming back, the workers' faces became even uglier and they muttered something.
"What nonsense are you talking about? Tell me quickly, what's going on?" Zhao Jingfu shouted.
Although Zhao Jingfu is usually strict with his work, he is still very kind to his workers. As long as he doesn't make a big mistake, he can get away with it. No one has ever seen him so angry.
When the workers next to him saw this, they didn't dare to say anything. They focused their attention on the welding gun in front of them, but their ears were perked up to listen to Zhao Jingfu's movements.
In fact, we can’t blame Zhao Jingfu for being angry. Hu Yufeng had just held a meeting to emphasize quality issues and specifically named these front-line backbones to control quality. This is what happened to him here.
Wei Yuhui hurriedly handed the inspection report in her hand to Zhao Jingfu.
"Old Zhao, look here, you can vaguely see a three-millimeter shadow, but I'm not sure what it is. What do you think?"
Zhao Jingfu looked at the shadow that had been magnified several times. It did not look very conspicuous, and could even be ignored if he didn't look carefully. However, it was Wei Yuhui who was inspecting it this time and found something fishy in it.
No one thought this was anything special before discovering it, but when this shadow of only three millimeters was highlighted, it was like being pierced by a sharp blade, causing a huge hole in the weld.
"It doesn't look like a crack!" Zhao Jingfu carefully observed the shape and position of the shadow and shook his head slightly.
Wei Yuhui also nodded: "I don't think it's a crack or lack of fusion. Could it be that it's not penetrated?"
Zhao Jingfu turned his head and glanced at the several welders in front of him. They were all his subordinates. One of them was a technician, and his level was considered to be among the best in the team.
"How many of you did the welding?" Zhao Jingfu asked.
"Yes, squad leader, we did the welding. We all followed the welding process and we didn't dare to be careless!" the workers immediately said in gibberish.
Zhao Jingfu knew that these people would not lie. He looked at the shadow and asked, "How did you deal with it?"
"Squad leader, before we welded, we followed the process and did a very thorough root cleaning. To be on the safe side, we also specially did a root cleaning and coloring inspection. In addition, when welding the back side, the welding specifications are relatively large. Even if there are problems, it is enough to remove the unsoldered parts.
The hidden danger is melted." The technician explained his welding process in detail.
After listening to the other party's explanation, Zhao Jingfu also fell into confusion. According to the technician, it is indeed impossible for this situation to happen again, but now that the facts are in front of him, what exactly is it?
"It's really not possible to perform positioning, digging and repair welding from the back!" Wei Yuhui proposed a solution.
Zhao Jingfu shook his head slightly: "Although this can solve the shadow problem, we are currently unable to determine what the shadow is. Once the hidden danger is removed during the digging process but is not discovered, the weld will eventually be dug through and repaired.
Welding will cause repeated and continuous heating cycles, which may cause other hidden dangers! I have encountered before that the stress intensity of the weld is greatly reduced unless the entire weld is removed!"
"This is impossible!" Wei Yuhui looked at the long weld in front of her. The amount of such a large project is not a small number.
"Is it really a crack?" Zhao Jingfu carefully observed the inspection sheet again, "Although this thing does not have the characteristics of a crack, the thickness of f690 is too large, which will cause great welding stress and occasional welding cracks?
"
"This possibility you mentioned also exists. What are you going to do now?" Wei Yuhui asked.
Zhao Jingfu frowned and thought for a moment, "I have to work hard on you and conduct a comprehensive inspection of the shadow part again. I want to see where it is!"
The welded steel plate weighed more than ten tons. With the help of the gantry crane, it slowly left the welding table. Wei Yuhui and the girls from the inspection department immediately arranged various non-damaging welding equipment on the top, bottom, left and right of the steel plate weld, front and back.
Detection equipment is used to conduct a comprehensive inspection of the problem areas just discovered.
After working for more than two hours, it was already getting dark. With everyone's attention and anticipation, the test results came out.
Wei Yuhui was stunned after taking one look at her. Looking at her expression, Zhao Jingfu thought something more serious had happened. He hurriedly took the report sheet over and looked at it. He was also stunned for a moment.
The shadow still exists, but its location is not at the bottom as the two men imagined before, but on the near surface!
"Not fused?" Wei Yuhui said in a low voice.
"Not fused!" Zhao Jingfu threw the report sheet in his hand on the steel plate, "Who did the filling layer? Such a low-level mistake!"
The technician looked around and raised his hand slightly, "Squad leader, I did the welding!"
"You are also an experienced welder, how could you make such a low-level mistake?" Zhao Jingfu was furious.
If a comprehensive inspection had not been carried out again, according to the previous plan, all the welds would have to be eradicated. This would consume a lot of manpower, material resources, and time, which would be huge for the current Fengyang Shipyard.
loss.
"Squad leader, it's not the master's problem!" The technician's apprentice immediately cried and said, "The master asked me to do the filling layer. I may not have adjusted the parameters properly, which caused hidden dangers!"
"Is that so?" Zhao Jingfu turned his head and glanced at the technician. This boy was able to handle things for his apprentice, just like he was before.
The technician nodded slightly: "He has been with the team for a long time and has never gotten started. I thought there was nothing wrong with the filling layer, so I let him practice for a while. I didn't expect that he made such a big mess. Squad leader, please punish me.
Well, it’s my lax discipline!”
"It's okay if you know that discipline is not strict. Although it is said that the child is unwilling to learn and the teacher is lazy, but the apprentice is willing to learn, you have to teach carefully. If you can't teach it, just let it go. Fortunately, Team Leader Wei found it out for you this time. If this is true
If it's installed on the Blue Whale, it's a huge hidden danger!"
"Yes, yes!" the technician claimed.
"Although there were no serious consequences this time, it also served as a warning to us. So, do you have any objection to deducting your attendance bonus for one month?" Zhao Jingfu asked.
"No, no!" the technician let out a long sigh of relief. This kind of thing used to require at least three months of attendance!
Zhao Jingfu patted his apprentice on the shoulder, "Learn from your master and be careful. I was just like you back then, so don't just cause trouble for your master!"
A hidden danger was finally successfully eliminated. As for eradication and repair welding, it was easy for Zhao Jingfu's team.