Temperatures in most parts of the country are lower than normal, and the northern Xinjiang and Yunnan-Guizhou-China border areas are 4-8 °C lower. Except for the majority of precipitation in the central and southwestern regions of Northeast China, the precipitation in most of the country is less than 50%. The sunshine hours in most areas south of the Huaihe River in the Qinling Mountains are less than 40 hours. The sunshine in the southwestern part of the southeast, Jiangnan and western China is less than 20 hours, and the rest of the country has better sunshine conditions. Most parts of the Northeast, Inner Mongolia, northern Xinjiang, and parts of the Yangtze River have more than 5 cm of snow cover, and some areas have a thickness of more than 20 cm. Linyi Fertilizer Network Copyright
The temperature is lower than normal, which is not conducive to the production of agricultural facilities. In mid-January, large-scale low-temperature rain, snow and ice weather appeared in the south, and vegetables, winter crops, economic forest fruit, aquaculture, facility agriculture and animal husbandry production were affected, including Guizhou, Chongqing, Hubei, Hunan, Jiangxi, Zhejiang, Guangxi and other places. Some sugar cane, potatoes, warm vegetables, bananas, papayas, etc. are frozen. Most of the northern winter wheat areas have no precipitation, and the drought in the wheat fields in the south of Huanghuai and the northern part of the Yangtze River is not continued. Linyi Fertilizer Network Copyright
At present, winter wheat in most of the northwestern region, north China, central and eastern Huanghuai, and northern Jianghuai is in the wintering period; southwestern Shaanxi, southwestern Henan, southern Jianghuai, Jianghan, Sichuan, and Guizhou are in the tillering stage; Yunnan is in the jointing stage, and some areas are heading. . Linyi Fertilizer Network Copyright
Most of the middle and lower reaches of the Yangtze River are in the fifth true leaf to the bud stage, and most of Hunan and Southwest are in the bud to the convulsion period. Linyi Fertilizer Network Copyright
It is expected that the cold air activities affecting China will be more frequent in the next 10 days. Except for the temperature in the northern part of Heilongjiang and parts of Tibet, which is close to normal or slightly higher than normal, the temperature in most other parts of the country is 1~2 °C lower than normal; 26~29 On the day, affected by a strong cold air, China will have a large-scale process of rain and snow and windy weather. In the next 10 days, there will be more rain and snow in the eastern part of the southwestern region, and there will be a significant precipitation process in the south of the south of the Yangtze River and the southern part of China. The precipitation in the above areas is generally 5 to 15 mm. During the day of the 22nd to 26th, the meteorological arid areas such as North China and Huanghuai are still There is no obvious precipitation; around the 27th, there will be 1 to 3 mm of snowfall in some meteorological arid regions such as southern North China and western Huanghuai. Gale winds, rain and snow weather are unfavorable for the growth of winter wheat, rapeseed and open vegetables, potatoes, tobacco, fruit trees, economic forests, etc., and will also affect facility agriculture and animal husbandry production. Excessive soil moisture in farmland in the southeastern part of the southwest, south of the Yangtze River and parts of southern China will continue. The farmland in the southern part of North China and the western part of Huanghuai is expected to increase in the late second half of the year. Linyi Fertilizer Network Copyright
Recommendation: Linyi Fertilizer Network Copyright
1. The northern winter wheat area continues to dry and cold weather, and there is no snow cover in the wheat fields of North China, Huanghuai and other places, which is easy to cause the situation of drought and freezing. For the plots that have been over-wintered and have better seedlings, they are managed according to conventional methods. For plots with irrigated conditions but not over-watered, use a sunny day with a daily average temperature of 3 °C or above. The water is poured finely, and the fertilizer is properly topdressed, and the plots are preserved; the plots without hydration conditions are repressed and slashed. Linyi Fertilizer Network Copyright
2. The southern part of the country should continue to strengthen the work of wintering crops, facility agriculture, and aquatic products. In areas where the soil is too wet, it is necessary to grasp the clear ditch and reduce the soil moisture of the farmland. At the same time, it is necessary to apply organic fertilizer to the crops with long-term deviations in order to increase the ground temperature and promote the steady growth of crops. Linyi Fertilizer Network Copyright
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Iron Investment Casting
Iron Investment Casting, also known as iron lost wax casting or ferrous investment casting, is a manufacturing process that involves pouring molten iron into a mould made from a wax pattern. The wax pattern is created by injecting molten wax into a mould cavity formed around a pattern of the desired part. Once the wax pattern is coated with ceramic material and dried, it is heated to melt and remove the wax, leaving a cavity in the shape of the desired part. Molten iron is then poured into the cavity and allowed to solidify, creating a final iron casting with intricate details and high dimensional accuracy.
The materials commonly used in iron investment casting include various grades of iron, such as grey iron, ductile iron, and alloyed iron. Grey iron, known for its high carbon content and graphite flakes, offers good machinability and damping capacity, making it suitable for applications requiring vibration absorption. Ductile iron, also known as nodular iron or spheroidal graphite iron, exhibits enhanced strength, ductility, and wear resistance compared to grey iron, making it ideal for components subjected to high stress and impact loads. Alloyed iron, which incorporates alloying elements such as chromium, nickel, and molybdenum, offers improved mechanical properties and corrosion resistance, expanding its application range in demanding environments.
Overall, iron investment casting provides manufacturers with the flexibility to produce complex iron components with precise dimensions and superior surface finish, making it a preferred choice for various industries, including automotive, aerospace, machinery, and infrastructure.
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