The wind power industry, once seen as a bright future for clean energy, has recently faced significant challenges. According to the "Global Wind Power Development Outlook 2012" report by Greenpeace and the Global Wind Energy Council, it was predicted that by 2020, wind power could supply 12% of global electricity demand and reduce CO₂ emissions by 15 billion tons annually. By 2030, this figure could rise beyond 20%. In China, the "12th Five-Year Plan" aimed for 100 million kilowatts of cumulative wind power capacity by 2015, with an annual generation of 190 billion kilowatt-hours, accounting for over 3% of total electricity. However, questions remain about whether these targets are being met. Shi Pengfei, deputy director of the China Wind Energy Committee, raised concerns: “Is that 190 billion kWh of electricity actually being delivered?” After years of rapid growth, China’s wind sector is now encountering major bottlenecks, including grid constraints and policy issues, which have slowed its development. One of the most pressing problems is wind curtailment, or "discarding wind." Data from the State Electricity Regulatory Commission showed that in 2011, wind farms in the “Three North” regions produced 12.3 billion kWh, but 16% of that was wasted due to grid limitations. By mid-2012, the curtailment rate had risen to around 15%, according to Shi Pengfei. This issue has been growing for years, and experts like Hou Yuxi of Goldwind Technology believe it stems from rapid early development without proper planning and coordination. “Wind curtailment is closely linked to power consumption, transmission, and grid scheduling,” said Hou. “It's not just the grid's fault—it's also about national systems and local interests.” He added that while multiple parties are working to address the problem, incomplete coordination among stakeholders has led to inefficiencies. However, he remains optimistic that structural adjustments and improved collaboration could reduce wind waste within three to five years. To solve the issue, Hou emphasized the need for better grid infrastructure and long-distance transmission capabilities. “We need to adjust peak loads and improve long-distance transmission,” he said. Shi Pengfei also highlighted the importance of a quota system to ensure wind power is fully utilized. Meanwhile, subsidies remain a critical concern. As of November 2012, green energy subsidies from 2010 had still not been paid out, creating financial strain on developers. Dai Dongdong of Dongfang Electric noted that investors are now more cautious, and without timely subsidies, many projects may struggle to survive. Hou Yuxi pointed out that delayed subsidy payments and slow grid settlements create a ripple effect, impacting manufacturers and developers alike. He called for the government to streamline processes and improve management practices. Tax exemptions, he suggested, could offer much-needed relief, allowing companies to recover funds faster and reduce financial pressure. Despite the challenges, the potential for wind power remains strong. Shi Pengfei emphasized that large-scale development is essential, but it must be matched with systemic upgrades. Sifan Taiske of Greenpeace International stressed that stable policies are key to long-term growth. With the right support, the global wind industry could create 2.1 million jobs by 2020—three times the current number. The path forward requires patience, coordination, and a clear vision from policymakers.

Cutting Tool

Introduction of diamond saw blade

Diamond saw blade is a kind of cutting tool, which is widely used in the processing of hard and brittle materials such as stone and ceramics. Diamond saw blade is mainly composed of two parts; the base body and the Cutter Head. It is the part that cuts during use. The cutter head will be continuously consumed during use, but the substrate will not. The reason why the cutter head can cut is because it contains diamond, which is currently the hardest substance. , it frictionally cuts the processed object in the cutter head. The diamond particles are wrapped in metal inside the cutter head.

Manufacturing Process Classification

1. Sintered diamond saw blade: It is divided into two types: cold press sintering and hot press sintering, which are formed by pressing and sintering.
2. Welding diamond saw blades: divided into two types: high-frequency welding and laser welding. High-frequency welding welds the cutter head and the substrate together through high-temperature melting media, and laser welding uses high-temperature laser beams to melt the contact edge of the cutter head and the substrate to form metallurgy combine
3. Electroplated diamond saw blade: the blade powder is attached to the substrate by electroplating.

Appearance classification:

1.Continuous edge saw blade: continuous sawtooth diamond saw blade, generally made by sintering method, commonly used bronze binder
2. Segment head type saw blade: the saw teeth are broken, the cutting speed is fast, suitable for both dry and wet cutting methods
3. Turbine-type saw blade: Combining the advantages of 1 and 2 above, the saw teeth continuously present a turbine-like uniform convexity, which improves the cutting speed and increases the service life.

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Hubei Chengze Diamod Products Co., Ltd. , https://www.ryomaltools.com