Divided according to material: steel test piles, test piles of cement, plastic test pile. Test piles are divided into carbon steel test piles and steel test piles.
按材质分：钢质测试桩、水泥测试桩、塑料测试桩。钢质测试桩又分为碳钢测试桩和不锈钢测试桩。
The present invention has the advantages of effective increasing of graphite in pile-up alloy, reduced carbon content in the base tissue, raised alloying degree and raised toughness.
本发明的优点是：可有效增加堆焊合金中的石墨数量，同时减少基体组织的含碳量并提高其合金化程度和基体的强韧性。
The welding rod capable of forming pile-up welded graphite-steel metal consists of welding rod core of low-carbon steel and nickel or nickel-base alloy and coating outside the welding rod core.
本发明公开了一种可通过焊接形成石墨钢堆焊金属的焊条。它由低碳钢、镍或镍基合金制成的焊芯和压涂在焊芯外表面的焊条药皮构成；
The welding rod capable of forming pile-up welded graphite-steel metal consists of welding rod core of low-carbon steel and nickel or nickel-base alloy and coating outside the welding rod core.
本发明公开了一种可通过焊接形成石墨钢堆焊金属的焊条。它由低碳钢、镍或镍基合金制成的焊芯和压涂在焊芯外表面的焊条药皮构成；
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