산업 뉴스

패스너 청소의 6가지 일반적인 문제 분석

2021-06-18
더 잘 사용하기 위해패스너, when we use 패스너, we need regular maintenance, such as regular cleaning of 패스너, which can improve the efficiency of 패스너. But when we clean the 패스너, we often find some problems, mainly there are six common problems.
1. 헹굼시 발생하는 오염
After the 패스너 were quenched, they were cleaned with silicate cleaning agent and then rinsed. Solid materials appeared on the surface. The infrared spectrometer was used to analyze this material and it was confirmed to be inorganic silicate and iron oxide. This is caused by the incomplete rinsing and residual silicate on the surface of the 잠그는 물건.

2. 무리한 적재패스너
Fasteners show signs of discoloration after tempering. Use soaking to allow oily residue to remain after volatilization, which is a high content of lipids. It shows that the 잠그는 물건 is contaminated by cleaning agent and quenching oil during the rinsing period, and it melts at the heat treatment temperature, leaving chemical burn scars. Such substances confirm that the surface of the 잠그는 물건 is not clean. Analyzed by infrared spectrometer, it is a mixture of base oil and ether in quenching oil. The ether may come from the addition of quenching oil. The analysis results of the quenching oil in the mesh belt furnace confirmed that the 패스너 are slightly oxidized in the quenching oil due to unreasonable stacking when heating, but it is almost negligible. This phenomenon is related to the cleaning process, not the quenching oil. The problem.


3. 표면 잔류물

고강도 나사에 흰색 잔류물이 있는데 적외선 분광기로 분석한 결과 인화물로 확인되었습니다. 산성 세척제 세척은 수행하지 않았으며 헹굼 탱크를 검사한 결과 탱크 액체의 탄소 용해도가 더 높은 것으로 나타났습니다. 탱크액은 정기적으로 부어야 하며 헹굼 탱크의 잿물 농도를 자주 확인해야 합니다.

4. 알칼리 화상
고강도 나사는 담금질 열에 의해 검게 변하며 균일하고 매끄러운 오일 블랙 외부 표면을 가지고 있습니다. 그러나 외부 원에 주황색 XX로 육안으로 보이는 영역이 있습니다. 또한 약간 밝은 파란색 또는 밝은 빨간색 영역이 있습니다. 원래의 바와 선재는 인산염 피막으로 코팅되어 냉간압조 및 태핑이 용이합니다. 헹구지 않고 직접 열처리, 퀜칭유로 냉각, 알칼리성 세제로 세척, 블로우드라이(헹구지 않음), 550°C 뜨임, 핫 뜨임로에서 방청유 제거 후 붉은 반점 발견 나사산.
It has been tested that the red area on the screw is caused by alkali burns. The chloride-containing substances and calcium-containing compounds of the alkaline cleaning agent will burn the steel 패스너 during the heat treatment, leaving scars on the surface of the 패스너.
Iron and steel 패스너 cannot remove surface alkalis in the quenching oil, so that the surface burns in the high-temperature austenite state and aggravates the damage during the next step of tempering. The recommendation is to thoroughly clean and rinse the 패스너 before heat treatment to completely remove the alkaline residues that cause the 패스너 to burn.


5. 부적절한 헹굼

대형용패스너, 고분자 수용액은 담금질에 자주 사용되며 알칼리성 세제는 담금질 전에 세척 및 헹굼에 사용됩니다. 담금질 후,패스너 have rusted on the inside. Analysis with infrared spectrometer confirmed that in addition to iron oxide, there are sodium, potassium and sulfur, indicating that there is an alkaline cleaning agent on the inside of the 잠그는 물건, which is likely to be potassium hydroxide, sodium carbonate or similar substances, which promotes its rust. Rinse the 패스너 to check whether there is excessive contamination, and it is also recommended to change the rinse water frequently. In addition, adding rust inhibitors to the water is also a good way.

6. 과도한 부식
일부 검은 줄무늬는 고강도에서 종종 볼 수 있습니다.패스너. It has also been seen in the test that the 패스너 before the heat treatment have been rinsed with inorganic and organic cleaning agents. After quenching, there are still black stripes and even careful cleaning before heat treatment. , Will also leave streaks after heat treatment. Infrared spectrometer was used to analyze the residual pollutants on the surface, and it was found that there were higher concentrations of sulfur and calcium. With a small amount of acetic acid and isopropanol, fold a small piece of test filter paper on the dark spot and wipe it firmly, leaving the dark spot on the filter paper. Analysis of the filter paper with infrared spectrometer confirmed that calcium, sulfur, iron, manganese and chromium are the main elements.


녹 반점에 칼슘과 황이 존재한다는 것은 이 물질이 건조된 퀜칭 오일임을 나타내며, 퀜칭 과정에서 증기상의 진화이기도 합니다. 퀜칭 오일은 과도하게 노화되기 때문에 기존 오일을 버리고 새 오일을 추가하고 전체 공정 주기 동안 공정 감독 및 퀜칭 오일 유지보수를 시행하는 것이 좋습니다.